diff --git a/.github/workflows/e2e_tests.yml b/.github/workflows/e2e_tests.yml
new file mode 100644
index 00000000..573672cc
--- /dev/null
+++ b/.github/workflows/e2e_tests.yml
@@ -0,0 +1,78 @@
+name: Playwright Tests
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  test:
+    # Installing Playright dependencies can take quite awhile, and also depends on GitHub CI load.
+    timeout-minutes: 15
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Install dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y libwoff1
+
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        id: setup_node
+        with:
+          node-version-file: package.json
+          cache: npm
+
+      # Cache Playwright browsers
+      - name: Cache Playwright browsers
+        id: cache-playwright
+        uses: actions/cache@v4
+        with:
+          path: ~/.cache/ms-playwright # The default Playwright cache path
+          key: ${{ runner.os }}-playwright-${{ hashFiles('package-lock.json') }} # Cache key based on OS and package-lock.json
+          restore-keys: |
+            ${{ runner.os }}-playwright-
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Install Playwright dependencies
+        run: npx playwright install-deps
+
+      - name: Install Playwright and browsers unless cached
+        run: npx playwright install --with-deps
+        if: steps.cache-playwright.outputs.cache-hit != 'true'
+
+      - name: Run Playwright tests
+        id: playwright-tests
+        run: npm run test:e2e
+
+      - name: Upload Playwright Report and Screenshots
+        uses: actions/upload-artifact@v4
+        if: steps.playwright-tests.conclusion != 'skipped'
+        with:
+          name: playwright-report
+          path: |
+            client/playwright-report/
+            client/test-results/
+            client/results.json
+          retention-days: 2
+
+      - name: Publish Playwright Test Summary
+        uses: daun/playwright-report-summary@v3
+        if: steps.playwright-tests.conclusion != 'skipped'
+        with:
+          create-comment: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
+          report-file: client/results.json
+          comment-title: "🎭 Playwright E2E Test Results"
+          job-summary: true
+          icon-style: "emojis"
+          custom-info: |
+            **Test Environment:** Ubuntu Latest, Node.js ${{ steps.setup_node.outputs.node-version }}
+            **Browsers:** Chromium, Firefox
+
+            📊 [View Detailed HTML Report](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}) (download artifacts)
+          test-command: "npm run test:e2e"
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index dd0b5e40..d01f7175 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -19,13 +19,16 @@ jobs:
 
       - uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version-file: package.json
           cache: npm
 
       # Working around https://github.com/npm/cli/issues/4828
       # - run: npm ci
       - run: npm install --no-package-lock
 
+      - name: Check version consistency
+        run: npm run check-version
+
       - name: Check linting
         working-directory: ./client
         run: npm run lint
@@ -50,7 +53,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: actions/setup-node@v4
         with:
-          node-version: 18
+          node-version-file: package.json
           cache: npm
           registry-url: "https://registry.npmjs.org"
 
diff --git a/.gitignore b/.gitignore
index 60faf653..8e184de8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,7 @@ client/tsconfig.app.tsbuildinfo
 client/tsconfig.node.tsbuildinfo
 cli/build
 test-output
+client/playwright-report/
+client/results.json
+client/test-results/
+
diff --git a/.node-version b/.node-version
new file mode 100644
index 00000000..980f29c2
--- /dev/null
+++ b/.node-version
@@ -0,0 +1 @@
+22.x.x
diff --git a/CLAUDE.md b/CLAUDE.md
index e62fd188..ec826b1f 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -30,4 +30,4 @@ The project is organized as a monorepo with workspaces:
 
 - `client/`: React frontend with Vite, TypeScript and Tailwind
 - `server/`: Express backend with TypeScript
-- `bin/`: CLI scripts
+- `cli/`: Command-line interface for testing and invoking MCP server methods directly
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 72502f96..0129a9e3 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -7,13 +7,13 @@ Thanks for your interest in contributing! This guide explains how to get involve
 1. Fork the repository and clone it locally
 2. Install dependencies with `npm install`
 3. Run `npm run dev` to start both client and server in development mode
-4. Use the web UI at http://127.0.0.1:6274 to interact with the inspector
+4. Use the web UI at http://localhost:6274 to interact with the inspector
 
 ## Development Process & Pull Requests
 
 1. Create a new branch for your changes
 2. Make your changes following existing code style and conventions. You can run `npm run prettier-check` and `npm run prettier-fix` as applicable.
-3. Test changes locally by running `npm test`
+3. Test changes locally by running `npm test` and `npm run test:e2e`
 4. Update documentation as needed
 5. Use clear commit messages explaining your changes
 6. Verify all changes work as expected
diff --git a/README.md b/README.md
index dd1b79ee..41aabf06 100644
--- a/README.md
+++ b/README.md
@@ -148,9 +148,9 @@ The MCP Inspector proxy server requires authentication by default. When starting
    http://localhost:6274/?MCP_PROXY_AUTH_TOKEN=3a1c267fad21f7150b7d624c160b7f09b0b8c4f623c7107bbf13378f051538d4
 ```
 
-This token must be included as a Bearer token in the Authorization header for all requests to the server. When authentication is enabled, auto-open is disabled by default to ensure you use the secure URL.
+This token must be included as a Bearer token in the Authorization header for all requests to the server. The inspector will automatically open your browser with the token pre-filled in the URL.
 
-**Recommended: Use the pre-filled URL** - Click or copy the link shown in the console to open the inspector with the token already configured.
+**Automatic browser opening** - The inspector now automatically opens your browser with the token pre-filled in the URL when authentication is enabled.
 
 **Alternative: Manual configuration** - If you already have the inspector open:
 
@@ -174,33 +174,33 @@ MCP_PROXY_AUTH_TOKEN=$(openssl rand -hex 32) npm start
 
 #### Local-only Binding
 
-By default, the MCP Inspector proxy server binds only to `127.0.0.1` (localhost) to prevent network access. This ensures the server is not accessible from other devices on the network. If you need to bind to all interfaces for development purposes, you can override this with the `HOST` environment variable:
+By default, both the MCP Inspector proxy server and client bind only to `localhost` to prevent network access. This ensures they are not accessible from other devices on the network. If you need to bind to all interfaces for development purposes, you can override this with the `HOST` environment variable:
 
 ```bash
 HOST=0.0.0.0 npm start
 ```
 
-**Warning:** Only bind to all interfaces in trusted network environments, as this exposes the proxy server's ability to execute local processes.
+**Warning:** Only bind to all interfaces in trusted network environments, as this exposes the proxy server's ability to execute local processes and both services to network access.
 
 #### DNS Rebinding Protection
 
 To prevent DNS rebinding attacks, the MCP Inspector validates the `Origin` header on incoming requests. By default, only requests from the client origin are allowed (respects `CLIENT_PORT` if set, defaulting to port 6274). You can configure additional allowed origins by setting the `ALLOWED_ORIGINS` environment variable (comma-separated list):
 
 ```bash
-ALLOWED_ORIGINS=http://localhost:6274,http://127.0.0.1:6274,http://localhost:8000 npm start
+ALLOWED_ORIGINS=http://localhost:6274,http://localhost:8000 npm start
 ```
 
 ### Configuration
 
 The MCP Inspector supports the following configuration settings. To change them, click on the `Configuration` button in the MCP Inspector UI:
 
-| Setting                                 | Description                                                                                                   | Default |
-| --------------------------------------- | ------------------------------------------------------------------------------------------------------------- | ------- |
-| `MCP_SERVER_REQUEST_TIMEOUT`            | Timeout for requests to the MCP server (ms)                                                                   | 10000   |
-| `MCP_REQUEST_TIMEOUT_RESET_ON_PROGRESS` | Reset timeout on progress notifications                                                                       | true    |
-| `MCP_REQUEST_MAX_TOTAL_TIMEOUT`         | Maximum total timeout for requests sent to the MCP server (ms) (Use with progress notifications)              | 60000   |
-| `MCP_PROXY_FULL_ADDRESS`                | Set this if you are running the MCP Inspector Proxy on a non-default address. Example: http://10.1.1.22:5577  | ""      |
-| `MCP_AUTO_OPEN_ENABLED`                 | Enable automatic browser opening when inspector starts. Only as environment var, not configurable in browser. | true    |
+| Setting                                 | Description                                                                                                                                       | Default |
+| --------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------- | ------- |
+| `MCP_SERVER_REQUEST_TIMEOUT`            | Timeout for requests to the MCP server (ms)                                                                                                       | 10000   |
+| `MCP_REQUEST_TIMEOUT_RESET_ON_PROGRESS` | Reset timeout on progress notifications                                                                                                           | true    |
+| `MCP_REQUEST_MAX_TOTAL_TIMEOUT`         | Maximum total timeout for requests sent to the MCP server (ms) (Use with progress notifications)                                                  | 60000   |
+| `MCP_PROXY_FULL_ADDRESS`                | Set this if you are running the MCP Inspector Proxy on a non-default address. Example: http://10.1.1.22:5577                                      | ""      |
+| `MCP_AUTO_OPEN_ENABLED`                 | Enable automatic browser opening when inspector starts (works with authentication enabled). Only as environment var, not configurable in browser. | true    |
 
 These settings can be adjusted in real-time through the UI and will persist across sessions.
 
@@ -305,9 +305,12 @@ npx @modelcontextprotocol/inspector --cli node build/index.js --method resources
 # List available prompts
 npx @modelcontextprotocol/inspector --cli node build/index.js --method prompts/list
 
-# Connect to a remote MCP server
+# Connect to a remote MCP server (default is SSE transport)
 npx @modelcontextprotocol/inspector --cli https://my-mcp-server.example.com
 
+# Connect to a remote MCP server (with Streamable HTTP transport)
+npx @modelcontextprotocol/inspector --cli https://my-mcp-server.example.com --transport http
+
 # Call a tool on a remote server
 npx @modelcontextprotocol/inspector --cli https://my-mcp-server.example.com --method tools/call --tool-name remotetool --tool-arg param=value
 
diff --git a/cli/package.json b/cli/package.json
index 8e895a55..bfb173a8 100644
--- a/cli/package.json
+++ b/cli/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@modelcontextprotocol/inspector-cli",
-  "version": "0.14.2",
+  "version": "0.15.0",
   "description": "CLI for the Model Context Protocol inspector",
   "license": "MIT",
   "author": "Anthropic, PBC (https://anthropic.com)",
@@ -21,7 +21,7 @@
   },
   "devDependencies": {},
   "dependencies": {
-    "@modelcontextprotocol/sdk": "^1.12.1",
+    "@modelcontextprotocol/sdk": "^1.13.1",
     "commander": "^13.1.0",
     "spawn-rx": "^5.1.2"
   }
diff --git a/cli/scripts/cli-tests.js b/cli/scripts/cli-tests.js
index 6e6b56f9..51bda553 100755
--- a/cli/scripts/cli-tests.js
+++ b/cli/scripts/cli-tests.js
@@ -44,7 +44,14 @@ console.log(`${colors.BLUE}- Resource-related options (--uri)${colors.NC}`);
 console.log(
   `${colors.BLUE}- Prompt-related options (--prompt-name, --prompt-args)${colors.NC}`,
 );
-console.log(`${colors.BLUE}- Logging options (--log-level)${colors.NC}\n`);
+console.log(`${colors.BLUE}- Logging options (--log-level)${colors.NC}`);
+console.log(
+  `${colors.BLUE}- Transport types (--transport http/sse/stdio)${colors.NC}`,
+);
+console.log(
+  `${colors.BLUE}- Transport inference from URL suffixes (/mcp, /sse)${colors.NC}`,
+);
+console.log(`\n`);
 
 // Get directory paths
 const SCRIPTS_DIR = __dirname;
@@ -62,9 +69,11 @@ if (!fs.existsSync(OUTPUT_DIR)) {
 }
 
 // Create a temporary directory for test files
-const TEMP_DIR = fs.mkdirSync(path.join(os.tmpdir(), "mcp-inspector-tests"), {
-  recursive: true,
-});
+const TEMP_DIR = path.join(os.tmpdir(), "mcp-inspector-tests");
+fs.mkdirSync(TEMP_DIR, { recursive: true });
+
+// Track servers for cleanup
+let runningServers = [];
 
 process.on("exit", () => {
   try {
@@ -74,6 +83,21 @@ process.on("exit", () => {
       `${colors.RED}Failed to remove temp directory: ${err.message}${colors.NC}`,
     );
   }
+
+  runningServers.forEach((server) => {
+    try {
+      process.kill(-server.pid);
+    } catch (e) {}
+  });
+});
+
+process.on("SIGINT", () => {
+  runningServers.forEach((server) => {
+    try {
+      process.kill(-server.pid);
+    } catch (e) {}
+  });
+  process.exit(1);
 });
 
 // Use the existing sample config file
@@ -121,6 +145,11 @@ async function runBasicTest(testName, ...args) {
         stdio: ["ignore", "pipe", "pipe"],
       });
 
+      const timeout = setTimeout(() => {
+        console.log(`${colors.YELLOW}Test timed out: ${testName}${colors.NC}`);
+        child.kill();
+      }, 10000);
+
       // Pipe stdout and stderr to the output file
       child.stdout.pipe(outputStream);
       child.stderr.pipe(outputStream);
@@ -135,6 +164,7 @@ async function runBasicTest(testName, ...args) {
       });
 
       child.on("close", (code) => {
+        clearTimeout(timeout);
         outputStream.end();
 
         if (code === 0) {
@@ -201,6 +231,13 @@ async function runErrorTest(testName, ...args) {
         stdio: ["ignore", "pipe", "pipe"],
       });
 
+      const timeout = setTimeout(() => {
+        console.log(
+          `${colors.YELLOW}Error test timed out: ${testName}${colors.NC}`,
+        );
+        child.kill();
+      }, 10000);
+
       // Pipe stdout and stderr to the output file
       child.stdout.pipe(outputStream);
       child.stderr.pipe(outputStream);
@@ -215,6 +252,7 @@ async function runErrorTest(testName, ...args) {
       });
 
       child.on("close", (code) => {
+        clearTimeout(timeout);
         outputStream.end();
 
         // For error tests, we expect a non-zero exit code
@@ -611,6 +649,79 @@ async function runTests() {
     "debug",
   );
 
+  console.log(
+    `\n${colors.YELLOW}=== Running HTTP Transport Tests ===${colors.NC}`,
+  );
+
+  console.log(
+    `${colors.BLUE}Starting server-everything in streamableHttp mode.${colors.NC}`,
+  );
+  const httpServer = spawn(
+    "npx",
+    ["@modelcontextprotocol/server-everything", "streamableHttp"],
+    {
+      detached: true,
+      stdio: "ignore",
+    },
+  );
+  runningServers.push(httpServer);
+
+  await new Promise((resolve) => setTimeout(resolve, 3000));
+
+  // Test 25: HTTP transport inferred from URL ending with /mcp
+  await runBasicTest(
+    "http_transport_inferred",
+    "http://127.0.0.1:3001/mcp",
+    "--cli",
+    "--method",
+    "tools/list",
+  );
+
+  // Test 26: HTTP transport with explicit --transport http flag
+  await runBasicTest(
+    "http_transport_with_explicit_flag",
+    "http://127.0.0.1:3001",
+    "--transport",
+    "http",
+    "--cli",
+    "--method",
+    "tools/list",
+  );
+
+  // Test 27: HTTP transport with suffix and --transport http flag
+  await runBasicTest(
+    "http_transport_with_explicit_flag_and_suffix",
+    "http://127.0.0.1:3001/mcp",
+    "--transport",
+    "http",
+    "--cli",
+    "--method",
+    "tools/list",
+  );
+
+  // Test 28: SSE transport given to HTTP server (should fail)
+  await runErrorTest(
+    "sse_transport_given_to_http_server",
+    "http://127.0.0.1:3001",
+    "--transport",
+    "sse",
+    "--cli",
+    "--method",
+    "tools/list",
+  );
+
+  // Kill HTTP server
+  try {
+    process.kill(-httpServer.pid);
+    console.log(
+      `${colors.BLUE}HTTP server killed, waiting for port to be released...${colors.NC}`,
+    );
+  } catch (e) {
+    console.log(
+      `${colors.RED}Error killing HTTP server: ${e.message}${colors.NC}`,
+    );
+  }
+
   // Print test summary
   console.log(`\n${colors.YELLOW}=== Test Summary ===${colors.NC}`);
   console.log(`${colors.GREEN}Passed: ${PASSED_TESTS}${colors.NC}`);
diff --git a/cli/src/index.ts b/cli/src/index.ts
index bda1e8f7..5d5dcf8b 100644
--- a/cli/src/index.ts
+++ b/cli/src/index.ts
@@ -29,9 +29,13 @@ type Args = {
   logLevel?: LogLevel;
   toolName?: string;
   toolArg?: Record<string, string>;
+  transport?: "sse" | "stdio" | "http";
 };
 
-function createTransportOptions(target: string[]): TransportOptions {
+function createTransportOptions(
+  target: string[],
+  transport?: "sse" | "stdio" | "http",
+): TransportOptions {
   if (target.length === 0) {
     throw new Error(
       "Target is required. Specify a URL or a command to execute.",
@@ -50,8 +54,30 @@ function createTransportOptions(target: string[]): TransportOptions {
     throw new Error("Arguments cannot be passed to a URL-based MCP server.");
   }
 
+  let transportType: "sse" | "stdio" | "http";
+  if (transport) {
+    if (!isUrl && transport !== "stdio") {
+      throw new Error("Only stdio transport can be used with local commands.");
+    }
+    if (isUrl && transport === "stdio") {
+      throw new Error("stdio transport cannot be used with URLs.");
+    }
+    transportType = transport;
+  } else if (isUrl) {
+    const url = new URL(command);
+    if (url.pathname.endsWith("/mcp")) {
+      transportType = "http";
+    } else if (url.pathname.endsWith("/sse")) {
+      transportType = "sse";
+    } else {
+      transportType = "sse";
+    }
+  } else {
+    transportType = "stdio";
+  }
+
   return {
-    transportType: isUrl ? "sse" : "stdio",
+    transportType,
     command: isUrl ? undefined : command,
     args: isUrl ? undefined : commandArgs,
     url: isUrl ? command : undefined,
@@ -59,7 +85,7 @@ function createTransportOptions(target: string[]): TransportOptions {
 }
 
 async function callMethod(args: Args): Promise<void> {
-  const transportOptions = createTransportOptions(args.target);
+  const transportOptions = createTransportOptions(args.target, args.transport);
   const transport = createTransport(transportOptions);
   const client = new Client({
     name: "inspector-cli",
@@ -214,6 +240,22 @@ function parseArgs(): Args {
 
         return value as LogLevel;
       },
+    )
+    //
+    // Transport options
+    //
+    .option(
+      "--transport <type>",
+      "Transport type (sse, http, or stdio). Auto-detected from URL: /mcp → http, /sse → sse, commands → stdio",
+      (value: string) => {
+        const validTransports = ["sse", "http", "stdio"];
+        if (!validTransports.includes(value)) {
+          throw new Error(
+            `Invalid transport type: ${value}. Valid types are: ${validTransports.join(", ")}`,
+          );
+        }
+        return value as "sse" | "http" | "stdio";
+      },
     );
 
   // Parse only the arguments before --
diff --git a/cli/src/transport.ts b/cli/src/transport.ts
index e693f246..e0d67b4e 100644
--- a/cli/src/transport.ts
+++ b/cli/src/transport.ts
@@ -3,11 +3,12 @@ import {
   getDefaultEnvironment,
   StdioClientTransport,
 } from "@modelcontextprotocol/sdk/client/stdio.js";
+import { StreamableHTTPClientTransport } from "@modelcontextprotocol/sdk/client/streamableHttp.js";
 import type { Transport } from "@modelcontextprotocol/sdk/shared/transport.js";
 import { findActualExecutable } from "spawn-rx";
 
 export type TransportOptions = {
-  transportType: "sse" | "stdio";
+  transportType: "sse" | "stdio" | "http";
   command?: string;
   args?: string[];
   url?: string;
@@ -15,11 +16,22 @@ export type TransportOptions = {
 
 function createSSETransport(options: TransportOptions): Transport {
   const baseUrl = new URL(options.url ?? "");
-  const sseUrl = new URL("/sse", baseUrl);
+  const sseUrl = baseUrl.pathname.endsWith("/sse")
+    ? baseUrl
+    : new URL("/sse", baseUrl);
 
   return new SSEClientTransport(sseUrl);
 }
 
+function createHTTPTransport(options: TransportOptions): Transport {
+  const baseUrl = new URL(options.url ?? "");
+  const mcpUrl = baseUrl.pathname.endsWith("/mcp")
+    ? baseUrl
+    : new URL("/mcp", baseUrl);
+
+  return new StreamableHTTPClientTransport(mcpUrl);
+}
+
 function createStdioTransport(options: TransportOptions): Transport {
   let args: string[] = [];
 
@@ -67,6 +79,10 @@ export function createTransport(options: TransportOptions): Transport {
       return createSSETransport(options);
     }
 
+    if (transportType === "http") {
+      return createHTTPTransport(options);
+    }
+
     throw new Error(`Unsupported transport type: ${transportType}`);
   } catch (error) {
     throw new Error(
diff --git a/client/bin/client.js b/client/bin/client.js
index 7179e19e..2a7419e6 100755
--- a/client/bin/client.js
+++ b/client/bin/client.js
@@ -1,5 +1,6 @@
 #!/usr/bin/env node
 
+import open from "open";
 import { join, dirname } from "path";
 import { fileURLToPath } from "url";
 import handler from "serve-handler";
@@ -39,19 +40,23 @@ const server = http.createServer((request, response) => {
   return handler(request, response, handlerOptions);
 });
 
-const port = process.env.PORT || 6274;
+const port = parseInt(process.env.CLIENT_PORT || "6274", 10);
+const host = process.env.HOST || "localhost";
 server.on("listening", () => {
-  console.log(
-    `🔍 MCP Inspector is up and running at http://127.0.0.1:${port} 🚀`,
-  );
+  const url = process.env.INSPECTOR_URL || `http://${host}:${port}`;
+  console.log(`\n🚀 MCP Inspector is up and running at:\n   ${url}\n`);
+  if (process.env.MCP_AUTO_OPEN_ENABLED !== "false") {
+    console.log(`🌐 Opening browser...`);
+    open(url);
+  }
 });
 server.on("error", (err) => {
   if (err.message.includes(`EADDRINUSE`)) {
     console.error(
-      `❌  MCP Inspector PORT IS IN USE at http://127.0.0.1:${port} ❌ `,
+      `❌  MCP Inspector PORT IS IN USE at http://${host}:${port} ❌ `,
     );
   } else {
     throw err;
   }
 });
-server.listen(port);
+server.listen(port, host);
diff --git a/client/bin/start.js b/client/bin/start.js
index ccce7ade..70ca046e 100755
--- a/client/bin/start.js
+++ b/client/bin/start.js
@@ -2,15 +2,202 @@
 
 import open from "open";
 import { resolve, dirname } from "path";
-import { spawnPromise } from "spawn-rx";
+import { spawnPromise, spawn } from "spawn-rx";
 import { fileURLToPath } from "url";
+import { randomBytes } from "crypto";
 
 const __dirname = dirname(fileURLToPath(import.meta.url));
+const DEFAULT_MCP_PROXY_LISTEN_PORT = "6277";
 
 function delay(ms) {
   return new Promise((resolve) => setTimeout(resolve, ms, true));
 }
 
+function getClientUrl(port, authDisabled, sessionToken, serverPort) {
+  const host = process.env.HOST || "localhost";
+  const baseUrl = `http://${host}:${port}`;
+
+  const params = new URLSearchParams();
+  if (serverPort && serverPort !== DEFAULT_MCP_PROXY_LISTEN_PORT) {
+    params.set("MCP_PROXY_PORT", serverPort);
+  }
+  if (!authDisabled) {
+    params.set("MCP_PROXY_AUTH_TOKEN", sessionToken);
+  }
+  return params.size > 0 ? `${baseUrl}/?${params.toString()}` : baseUrl;
+}
+
+async function startDevServer(serverOptions) {
+  const { SERVER_PORT, CLIENT_PORT, sessionToken, envVars, abort } =
+    serverOptions;
+  const serverCommand = "npx";
+  const serverArgs = ["tsx", "watch", "--clear-screen=false", "src/index.ts"];
+  const isWindows = process.platform === "win32";
+
+  const spawnOptions = {
+    cwd: resolve(__dirname, "../..", "server"),
+    env: {
+      ...process.env,
+      SERVER_PORT,
+      CLIENT_PORT,
+      MCP_PROXY_TOKEN: sessionToken,
+      MCP_ENV_VARS: JSON.stringify(envVars),
+    },
+    signal: abort.signal,
+    echoOutput: true,
+  };
+
+  // For Windows, we need to use stdin: 'ignore' to simulate < NUL
+  if (isWindows) {
+    spawnOptions.stdin = "ignore";
+  }
+
+  const server = spawn(serverCommand, serverArgs, spawnOptions);
+
+  // Give server time to start
+  const serverOk = await Promise.race([
+    new Promise((resolve) => {
+      server.subscribe({
+        complete: () => resolve(false),
+        error: () => resolve(false),
+        next: () => {}, // We're using echoOutput
+      });
+    }),
+    delay(3000).then(() => true),
+  ]);
+
+  return { server, serverOk };
+}
+
+async function startProdServer(serverOptions) {
+  const {
+    SERVER_PORT,
+    CLIENT_PORT,
+    sessionToken,
+    envVars,
+    abort,
+    command,
+    mcpServerArgs,
+  } = serverOptions;
+  const inspectorServerPath = resolve(
+    __dirname,
+    "../..",
+    "server",
+    "build",
+    "index.js",
+  );
+
+  const server = spawnPromise(
+    "node",
+    [
+      inspectorServerPath,
+      ...(command ? [`--env`, command] : []),
+      ...(mcpServerArgs ? [`--args=${mcpServerArgs.join(" ")}`] : []),
+    ],
+    {
+      env: {
+        ...process.env,
+        SERVER_PORT,
+        CLIENT_PORT,
+        MCP_PROXY_TOKEN: sessionToken,
+        MCP_ENV_VARS: JSON.stringify(envVars),
+      },
+      signal: abort.signal,
+      echoOutput: true,
+    },
+  );
+
+  // Make sure server started before starting client
+  const serverOk = await Promise.race([server, delay(2 * 1000)]);
+
+  return { server, serverOk };
+}
+
+async function startDevClient(clientOptions) {
+  const {
+    CLIENT_PORT,
+    SERVER_PORT,
+    authDisabled,
+    sessionToken,
+    abort,
+    cancelled,
+  } = clientOptions;
+  const clientCommand = "npx";
+  const host = process.env.HOST || "localhost";
+  const clientArgs = ["vite", "--port", CLIENT_PORT, "--host", host];
+
+  const client = spawn(clientCommand, clientArgs, {
+    cwd: resolve(__dirname, ".."),
+    env: { ...process.env, CLIENT_PORT },
+    signal: abort.signal,
+    echoOutput: true,
+  });
+
+  const url = getClientUrl(
+    CLIENT_PORT,
+    authDisabled,
+    sessionToken,
+    SERVER_PORT,
+  );
+
+  // Give vite time to start before opening or logging the URL
+  setTimeout(() => {
+    console.log(`\n🚀 MCP Inspector is up and running at:\n   ${url}\n`);
+    if (process.env.MCP_AUTO_OPEN_ENABLED !== "false") {
+      console.log("🌐 Opening browser...");
+      open(url);
+    }
+  }, 3000);
+
+  await new Promise((resolve) => {
+    client.subscribe({
+      complete: resolve,
+      error: (err) => {
+        if (!cancelled || process.env.DEBUG) {
+          console.error("Client error:", err);
+        }
+        resolve(null);
+      },
+      next: () => {}, // We're using echoOutput
+    });
+  });
+}
+
+async function startProdClient(clientOptions) {
+  const {
+    CLIENT_PORT,
+    SERVER_PORT,
+    authDisabled,
+    sessionToken,
+    abort,
+    cancelled,
+  } = clientOptions;
+  const inspectorClientPath = resolve(
+    __dirname,
+    "../..",
+    "client",
+    "bin",
+    "client.js",
+  );
+
+  const url = getClientUrl(
+    CLIENT_PORT,
+    authDisabled,
+    sessionToken,
+    SERVER_PORT,
+  );
+
+  await spawnPromise("node", [inspectorClientPath], {
+    env: {
+      ...process.env,
+      CLIENT_PORT,
+      INSPECTOR_URL: url,
+    },
+    signal: abort.signal,
+    echoOutput: true,
+  });
+}
+
 async function main() {
   // Parse command line arguments
   const args = process.argv.slice(2);
@@ -18,6 +205,7 @@ async function main() {
   const mcpServerArgs = [];
   let command = null;
   let parsingFlags = true;
+  let isDev = false;
 
   for (let i = 0; i < args.length; i++) {
     const arg = args[i];
@@ -27,6 +215,11 @@ async function main() {
       continue;
     }
 
+    if (parsingFlags && arg === "--dev") {
+      isDev = true;
+      continue;
+    }
+
     if (parsingFlags && arg === "-e" && i + 1 < args.length) {
       const envVar = args[++i];
       const equalsIndex = envVar.indexOf("=");
@@ -38,34 +231,25 @@ async function main() {
       } else {
         envVars[envVar] = "";
       }
-    } else if (!command) {
+    } else if (!command && !isDev) {
       command = arg;
-    } else {
+    } else if (!isDev) {
       mcpServerArgs.push(arg);
     }
   }
 
-  const inspectorServerPath = resolve(
-    __dirname,
-    "../..",
-    "server",
-    "build",
-    "index.js",
-  );
-
-  // Path to the client entry point
-  const inspectorClientPath = resolve(
-    __dirname,
-    "../..",
-    "client",
-    "bin",
-    "client.js",
-  );
-
   const CLIENT_PORT = process.env.CLIENT_PORT ?? "6274";
-  const SERVER_PORT = process.env.SERVER_PORT ?? "6277";
+  const SERVER_PORT = process.env.SERVER_PORT ?? DEFAULT_MCP_PROXY_LISTEN_PORT;
 
-  console.log("Starting MCP inspector...");
+  console.log(
+    isDev
+      ? "Starting MCP inspector in development mode..."
+      : "Starting MCP inspector...",
+  );
+
+  // Generate session token for authentication
+  const sessionToken = randomBytes(32).toString("hex");
+  const authDisabled = !!process.env.DANGEROUSLY_OMIT_AUTH;
 
   const abort = new AbortController();
 
@@ -74,42 +258,42 @@ async function main() {
     cancelled = true;
     abort.abort();
   });
-  let server, serverOk;
-  try {
-    server = spawnPromise(
-      "node",
-      [
-        inspectorServerPath,
-        ...(command ? [`--env`, command] : []),
-        ...(mcpServerArgs ? [`--args=${mcpServerArgs.join(" ")}`] : []),
-      ],
-      {
-        env: {
-          ...process.env,
-          PORT: SERVER_PORT,
-          MCP_ENV_VARS: JSON.stringify(envVars),
-        },
-        signal: abort.signal,
-        echoOutput: true,
-      },
-    );
 
-    // Make sure server started before starting client
-    serverOk = await Promise.race([server, delay(2 * 1000)]);
+  let server, serverOk;
+
+  try {
+    const serverOptions = {
+      SERVER_PORT,
+      CLIENT_PORT,
+      sessionToken,
+      envVars,
+      abort,
+      command,
+      mcpServerArgs,
+    };
+
+    const result = isDev
+      ? await startDevServer(serverOptions)
+      : await startProdServer(serverOptions);
+
+    server = result.server;
+    serverOk = result.serverOk;
   } catch (error) {}
 
   if (serverOk) {
     try {
-      // Only auto-open when auth is disabled
-      const authDisabled = !!process.env.DANGEROUSLY_OMIT_AUTH;
-      if (process.env.MCP_AUTO_OPEN_ENABLED !== "false" && authDisabled) {
-        open(`http://127.0.0.1:${CLIENT_PORT}`);
-      }
-      await spawnPromise("node", [inspectorClientPath], {
-        env: { ...process.env, PORT: CLIENT_PORT },
-        signal: abort.signal,
-        echoOutput: true,
-      });
+      const clientOptions = {
+        CLIENT_PORT,
+        SERVER_PORT,
+        authDisabled,
+        sessionToken,
+        abort,
+        cancelled,
+      };
+
+      await (isDev
+        ? startDevClient(clientOptions)
+        : startProdClient(clientOptions));
     } catch (e) {
       if (!cancelled || process.env.DEBUG) throw e;
     }
diff --git a/client/e2e/global-teardown.js b/client/e2e/global-teardown.js
new file mode 100644
index 00000000..9308d940
--- /dev/null
+++ b/client/e2e/global-teardown.js
@@ -0,0 +1,18 @@
+import { rimraf } from "rimraf";
+
+async function globalTeardown() {
+  if (!process.env.CI) {
+    console.log("Cleaning up test-results directory...");
+    // Add a small delay to ensure all Playwright files are written
+    await new Promise((resolve) => setTimeout(resolve, 100));
+    await rimraf("./e2e/test-results");
+    console.log("Test-results directory cleaned up.");
+  }
+}
+
+export default globalTeardown;
+
+// Call the function when this script is run directly
+if (import.meta.url === `file://${process.argv[1]}`) {
+  globalTeardown().catch(console.error);
+}
diff --git a/client/e2e/transport-type-dropdown.spec.ts b/client/e2e/transport-type-dropdown.spec.ts
new file mode 100644
index 00000000..e4ac8fbb
--- /dev/null
+++ b/client/e2e/transport-type-dropdown.spec.ts
@@ -0,0 +1,113 @@
+import { test, expect } from "@playwright/test";
+
+// Adjust the URL if your dev server runs on a different port
+const APP_URL = "http://localhost:6274/";
+
+test.describe("Transport Type Dropdown", () => {
+  test("should have options for STDIO, SSE, and Streamable HTTP", async ({
+    page,
+  }) => {
+    await page.goto(APP_URL);
+
+    // Wait for the Transport Type dropdown to be visible
+    const selectTrigger = page.getByLabel("Transport Type");
+    await expect(selectTrigger).toBeVisible();
+
+    // Open the dropdown
+    await selectTrigger.click();
+
+    // Check for the three options
+    await expect(page.getByRole("option", { name: "STDIO" })).toBeVisible();
+    await expect(page.getByRole("option", { name: "SSE" })).toBeVisible();
+    await expect(
+      page.getByRole("option", { name: "Streamable HTTP" }),
+    ).toBeVisible();
+  });
+
+  test("should show Command and Arguments fields and hide URL field when Transport Type is STDIO", async ({
+    page,
+  }) => {
+    await page.goto(APP_URL);
+
+    // Wait for the Transport Type dropdown to be visible
+    const selectTrigger = page.getByLabel("Transport Type");
+    await expect(selectTrigger).toBeVisible();
+
+    // Open the dropdown and select STDIO
+    await selectTrigger.click();
+    await page.getByRole("option", { name: "STDIO" }).click();
+
+    // Wait for the form to update
+    await page.waitForTimeout(100);
+
+    // Check that Command and Arguments fields are visible
+    await expect(page.locator("#command-input")).toBeVisible();
+    await expect(page.locator("#arguments-input")).toBeVisible();
+
+    // Check that URL field is not visible
+    await expect(page.locator("#sse-url-input")).not.toBeVisible();
+
+    // Also verify the labels are present
+    await expect(page.getByText("Command")).toBeVisible();
+    await expect(page.getByText("Arguments")).toBeVisible();
+    await expect(page.getByText("URL")).not.toBeVisible();
+  });
+
+  test("should show URL field and hide Command and Arguments fields when Transport Type is SSE", async ({
+    page,
+  }) => {
+    await page.goto(APP_URL);
+
+    // Wait for the Transport Type dropdown to be visible
+    const selectTrigger = page.getByLabel("Transport Type");
+    await expect(selectTrigger).toBeVisible();
+
+    // Open the dropdown and select SSE
+    await selectTrigger.click();
+    await page.getByRole("option", { name: "SSE" }).click();
+
+    // Wait for the form to update
+    await page.waitForTimeout(100);
+
+    // Check that URL field is visible
+    await expect(page.locator("#sse-url-input")).toBeVisible();
+
+    // Check that Command and Arguments fields are not visible
+    await expect(page.locator("#command-input")).not.toBeVisible();
+    await expect(page.locator("#arguments-input")).not.toBeVisible();
+
+    // Also verify the labels are present/absent
+    await expect(page.getByText("URL")).toBeVisible();
+    await expect(page.getByText("Command")).not.toBeVisible();
+    await expect(page.getByText("Arguments")).not.toBeVisible();
+  });
+
+  test("should show URL field and hide Command and Arguments fields when Transport Type is Streamable HTTP", async ({
+    page,
+  }) => {
+    await page.goto(APP_URL);
+
+    // Wait for the Transport Type dropdown to be visible
+    const selectTrigger = page.getByLabel("Transport Type");
+    await expect(selectTrigger).toBeVisible();
+
+    // Open the dropdown and select Streamable HTTP
+    await selectTrigger.click();
+    await page.getByRole("option", { name: "Streamable HTTP" }).click();
+
+    // Wait for the form to update
+    await page.waitForTimeout(100);
+
+    // Check that URL field is visible
+    await expect(page.locator("#sse-url-input")).toBeVisible();
+
+    // Check that Command and Arguments fields are not visible
+    await expect(page.locator("#command-input")).not.toBeVisible();
+    await expect(page.locator("#arguments-input")).not.toBeVisible();
+
+    // Also verify the labels are present/absent
+    await expect(page.getByText("URL")).toBeVisible();
+    await expect(page.getByText("Command")).not.toBeVisible();
+    await expect(page.getByText("Arguments")).not.toBeVisible();
+  });
+});
diff --git a/client/index.html b/client/index.html
index 00f5600b..b3736a82 100644
--- a/client/index.html
+++ b/client/index.html
@@ -7,7 +7,7 @@
     <title>MCP Inspector</title>
   </head>
   <body>
-    <div id="root"></div>
+    <div id="root" class="w-full"></div>
     <script type="module" src="/src/main.tsx"></script>
   </body>
 </html>
diff --git a/client/jest.config.cjs b/client/jest.config.cjs
index b4d81cfc..8652eda5 100644
--- a/client/jest.config.cjs
+++ b/client/jest.config.cjs
@@ -21,6 +21,7 @@ module.exports = {
     "/node_modules/",
     "/dist/",
     "/bin/",
+    "/e2e/",
     "\\.config\\.(js|ts|cjs|mjs)$",
   ],
   // Exclude the same patterns from coverage reports
@@ -28,6 +29,7 @@ module.exports = {
     "/node_modules/",
     "/dist/",
     "/bin/",
+    "/e2e/",
     "\\.config\\.(js|ts|cjs|mjs)$",
   ],
 };
diff --git a/client/package.json b/client/package.json
index 540320bf..59bf2288 100644
--- a/client/package.json
+++ b/client/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@modelcontextprotocol/inspector-client",
-  "version": "0.14.2",
+  "version": "0.15.0",
   "description": "Client-side application for the Model Context Protocol inspector",
   "license": "MIT",
   "author": "Anthropic, PBC (https://anthropic.com)",
@@ -20,10 +20,12 @@
     "lint": "eslint .",
     "preview": "vite preview --port 6274",
     "test": "jest --config jest.config.cjs",
-    "test:watch": "jest --config jest.config.cjs --watch"
+    "test:watch": "jest --config jest.config.cjs --watch",
+    "test:e2e": "playwright test e2e && npm run cleanup:e2e",
+    "cleanup:e2e": "node e2e/global-teardown.js"
   },
   "dependencies": {
-    "@modelcontextprotocol/sdk": "^1.12.1",
+    "@modelcontextprotocol/sdk": "^1.13.1",
     "@radix-ui/react-checkbox": "^1.1.4",
     "ajv": "^6.12.6",
     "@radix-ui/react-dialog": "^1.1.3",
@@ -38,7 +40,7 @@
     "class-variance-authority": "^0.7.0",
     "clsx": "^2.1.1",
     "cmdk": "^1.0.4",
-    "lucide-react": "^0.447.0",
+    "lucide-react": "^0.523.0",
     "pkce-challenge": "^4.1.0",
     "prismjs": "^1.30.0",
     "react": "^18.3.1",
diff --git a/client/playwright.config.ts b/client/playwright.config.ts
new file mode 100644
index 00000000..570dd054
--- /dev/null
+++ b/client/playwright.config.ts
@@ -0,0 +1,70 @@
+import { defineConfig, devices } from "@playwright/test";
+
+/**
+ * @see https://playwright.dev/docs/test-configuration
+ */
+export default defineConfig({
+  /* Run your local dev server before starting the tests */
+  webServer: {
+    cwd: "..",
+    command: "npm run dev",
+    url: "http://localhost:6274",
+    reuseExistingServer: !process.env.CI,
+  },
+
+  testDir: "./e2e",
+  outputDir: "./e2e/test-results",
+  /* Run tests in files in parallel */
+  fullyParallel: true,
+  /* Fail the build on CI if you accidentally left test.only in the source code. */
+  forbidOnly: !!process.env.CI,
+  /* Retry on CI only */
+  retries: process.env.CI ? 2 : 0,
+  /* Opt out of parallel tests on CI. */
+  workers: process.env.CI ? 1 : undefined,
+  /* Reporter to use. See https://playwright.dev/docs/test-reporters */
+  reporter: process.env.CI
+    ? [
+        ["html", { outputFolder: "playwright-report" }],
+        ["json", { outputFile: "results.json" }],
+        ["line"],
+      ]
+    : [["line"]],
+  /* Shared settings for all the projects below. See https://playwright.dev/docs/api/class-testoptions. */
+  use: {
+    /* Base URL to use in actions like `await page.goto('/')`. */
+    baseURL: "http://localhost:6274",
+
+    /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
+    trace: "on-first-retry",
+
+    /* Take screenshots on failure */
+    screenshot: "only-on-failure",
+
+    /* Record video on failure */
+    video: "retain-on-failure",
+  },
+
+  /* Configure projects for major browsers */
+  projects: [
+    {
+      name: "chromium",
+      use: { ...devices["Desktop Chrome"] },
+    },
+
+    {
+      name: "firefox",
+      use: { ...devices["Desktop Firefox"] },
+    },
+
+    // Skip WebKit on macOS due to compatibility issues
+    ...(process.platform !== "darwin"
+      ? [
+          {
+            name: "webkit",
+            use: { ...devices["Desktop Safari"] },
+          },
+        ]
+      : []),
+  ],
+});
diff --git a/client/src/App.css b/client/src/App.css
index 5f47310f..0d669ffa 100644
--- a/client/src/App.css
+++ b/client/src/App.css
@@ -1,7 +1,3 @@
-#root {
-  margin: 0 auto;
-}
-
 .logo {
   height: 6em;
   padding: 1.5em;
diff --git a/client/src/App.tsx b/client/src/App.tsx
index 26eb44c5..3ceafcae 100644
--- a/client/src/App.tsx
+++ b/client/src/App.tsx
@@ -52,7 +52,7 @@ import { z } from "zod";
 import "./App.css";
 import AuthDebugger from "./components/AuthDebugger";
 import ConsoleTab from "./components/ConsoleTab";
-import HistoryAndNotifications from "./components/History";
+import HistoryAndNotifications from "./components/HistoryAndNotifications";
 import PingTab from "./components/PingTab";
 import PromptsTab, { Prompt } from "./components/PromptsTab";
 import ResourcesTab from "./components/ResourcesTab";
diff --git a/client/src/components/DynamicJsonForm.tsx b/client/src/components/DynamicJsonForm.tsx
index 6a5993c3..081a7d3b 100644
--- a/client/src/components/DynamicJsonForm.tsx
+++ b/client/src/components/DynamicJsonForm.tsx
@@ -16,10 +16,39 @@ interface DynamicJsonFormProps {
 const isSimpleObject = (schema: JsonSchemaType): boolean => {
   const supportedTypes = ["string", "number", "integer", "boolean", "null"];
   if (supportedTypes.includes(schema.type)) return true;
-  if (schema.type !== "object") return false;
-  return Object.values(schema.properties ?? {}).every((prop) =>
-    supportedTypes.includes(prop.type),
-  );
+  if (schema.type === "object") {
+    return Object.values(schema.properties ?? {}).every((prop) =>
+      supportedTypes.includes(prop.type),
+    );
+  }
+  if (schema.type === "array") {
+    return !!schema.items && isSimpleObject(schema.items);
+  }
+  return false;
+};
+
+const getArrayItemDefault = (schema: JsonSchemaType): JsonValue => {
+  if ("default" in schema && schema.default !== undefined) {
+    return schema.default;
+  }
+
+  switch (schema.type) {
+    case "string":
+      return "";
+    case "number":
+    case "integer":
+      return 0;
+    case "boolean":
+      return false;
+    case "array":
+      return [];
+    case "object":
+      return {};
+    case "null":
+      return null;
+    default:
+      return null;
+  }
 };
 
 const DynamicJsonForm = ({
@@ -113,6 +142,8 @@ const DynamicJsonForm = ({
     currentValue: JsonValue,
     path: string[] = [],
     depth: number = 0,
+    parentSchema?: JsonSchemaType,
+    propertyName?: string,
   ) => {
     if (
       depth >= maxDepth &&
@@ -122,7 +153,8 @@ const DynamicJsonForm = ({
       return (
         <JsonEditor
           value={JSON.stringify(
-            currentValue ?? generateDefaultValue(propSchema),
+            currentValue ??
+              generateDefaultValue(propSchema, propertyName, parentSchema),
             null,
             2,
           )}
@@ -140,6 +172,10 @@ const DynamicJsonForm = ({
       );
     }
 
+    // Check if this property is required in the parent schema
+    const isRequired =
+      parentSchema?.required?.includes(propertyName || "") ?? false;
+
     switch (propSchema.type) {
       case "string":
         return (
@@ -148,16 +184,11 @@ const DynamicJsonForm = ({
             value={(currentValue as string) ?? ""}
             onChange={(e) => {
               const val = e.target.value;
-              // Allow clearing non-required fields by setting undefined
-              // This preserves the distinction between empty string and unset
-              if (!val && !propSchema.required) {
-                handleFieldChange(path, undefined);
-              } else {
-                handleFieldChange(path, val);
-              }
+              // Always allow setting string values, including empty strings
+              handleFieldChange(path, val);
             }}
             placeholder={propSchema.description}
-            required={propSchema.required}
+            required={isRequired}
           />
         );
       case "number":
@@ -167,9 +198,7 @@ const DynamicJsonForm = ({
             value={(currentValue as number)?.toString() ?? ""}
             onChange={(e) => {
               const val = e.target.value;
-              // Allow clearing non-required number fields
-              // This preserves the distinction between 0 and unset
-              if (!val && !propSchema.required) {
+              if (!val && !isRequired) {
                 handleFieldChange(path, undefined);
               } else {
                 const num = Number(val);
@@ -179,7 +208,7 @@ const DynamicJsonForm = ({
               }
             }}
             placeholder={propSchema.description}
-            required={propSchema.required}
+            required={isRequired}
           />
         );
       case "integer":
@@ -190,9 +219,7 @@ const DynamicJsonForm = ({
             value={(currentValue as number)?.toString() ?? ""}
             onChange={(e) => {
               const val = e.target.value;
-              // Allow clearing non-required integer fields
-              // This preserves the distinction between 0 and unset
-              if (!val && !propSchema.required) {
+              if (!val && !isRequired) {
                 handleFieldChange(path, undefined);
               } else {
                 const num = Number(val);
@@ -203,7 +230,7 @@ const DynamicJsonForm = ({
               }
             }}
             placeholder={propSchema.description}
-            required={propSchema.required}
+            required={isRequired}
           />
         );
       case "boolean":
@@ -213,9 +240,135 @@ const DynamicJsonForm = ({
             checked={(currentValue as boolean) ?? false}
             onChange={(e) => handleFieldChange(path, e.target.checked)}
             className="w-4 h-4"
-            required={propSchema.required}
+            required={isRequired}
           />
         );
+      case "object":
+        if (!propSchema.properties) {
+          return (
+            <JsonEditor
+              value={JSON.stringify(currentValue ?? {}, null, 2)}
+              onChange={(newValue) => {
+                try {
+                  const parsed = JSON.parse(newValue);
+                  handleFieldChange(path, parsed);
+                  setJsonError(undefined);
+                } catch (err) {
+                  setJsonError(
+                    err instanceof Error ? err.message : "Invalid JSON",
+                  );
+                }
+              }}
+              error={jsonError}
+            />
+          );
+        }
+
+        return (
+          <div className="space-y-2 border rounded p-3">
+            {Object.entries(propSchema.properties).map(([key, subSchema]) => (
+              <div key={key}>
+                <label className="block text-sm font-medium mb-1">
+                  {key}
+                  {propSchema.required?.includes(key) && (
+                    <span className="text-red-500 ml-1">*</span>
+                  )}
+                </label>
+                {renderFormFields(
+                  subSchema as JsonSchemaType,
+                  (currentValue as Record<string, JsonValue>)?.[key],
+                  [...path, key],
+                  depth + 1,
+                  propSchema,
+                  key,
+                )}
+              </div>
+            ))}
+          </div>
+        );
+      case "array": {
+        const arrayValue = Array.isArray(currentValue) ? currentValue : [];
+        if (!propSchema.items) return null;
+
+        // If the array items are simple, render as form fields, otherwise use JSON editor
+        if (isSimpleObject(propSchema.items)) {
+          return (
+            <div className="space-y-4">
+              {propSchema.description && (
+                <p className="text-sm text-gray-600">
+                  {propSchema.description}
+                </p>
+              )}
+
+              {propSchema.items?.description && (
+                <p className="text-sm text-gray-500">
+                  Items: {propSchema.items.description}
+                </p>
+              )}
+
+              <div className="space-y-2">
+                {arrayValue.map((item, index) => (
+                  <div key={index} className="flex items-center gap-2">
+                    {renderFormFields(
+                      propSchema.items as JsonSchemaType,
+                      item,
+                      [...path, index.toString()],
+                      depth + 1,
+                    )}
+                    <Button
+                      variant="outline"
+                      size="sm"
+                      onClick={() => {
+                        const newArray = [...arrayValue];
+                        newArray.splice(index, 1);
+                        handleFieldChange(path, newArray);
+                      }}
+                    >
+                      Remove
+                    </Button>
+                  </div>
+                ))}
+                <Button
+                  variant="outline"
+                  size="sm"
+                  onClick={() => {
+                    const defaultValue = getArrayItemDefault(
+                      propSchema.items as JsonSchemaType,
+                    );
+                    handleFieldChange(path, [...arrayValue, defaultValue]);
+                  }}
+                  title={
+                    propSchema.items?.description
+                      ? `Add new ${propSchema.items.description}`
+                      : "Add new item"
+                  }
+                >
+                  Add Item
+                </Button>
+              </div>
+            </div>
+          );
+        }
+
+        // For complex arrays, fall back to JSON editor
+        return (
+          <JsonEditor
+            value={JSON.stringify(currentValue ?? [], null, 2)}
+            onChange={(newValue) => {
+              try {
+                const parsed = JSON.parse(newValue);
+                handleFieldChange(path, parsed);
+                setJsonError(undefined);
+              } catch (err) {
+                setJsonError(
+                  err instanceof Error ? err.message : "Invalid JSON",
+                );
+              }
+            }}
+            error={jsonError}
+          />
+        );
+      }
       default:
         return null;
     }
diff --git a/client/src/components/History.tsx b/client/src/components/HistoryAndNotifications.tsx
similarity index 89%
rename from client/src/components/History.tsx
rename to client/src/components/HistoryAndNotifications.tsx
index 78394dea..34c035f5 100644
--- a/client/src/components/History.tsx
+++ b/client/src/components/HistoryAndNotifications.tsx
@@ -110,15 +110,27 @@ const HistoryAndNotifications = ({
                 >
                   <div
                     className="flex justify-between items-center cursor-pointer"
-                    onClick={() => toggleNotificationExpansion(index)}
+                    onClick={() =>
+                      toggleNotificationExpansion(
+                        serverNotifications.length - 1 - index,
+                      )
+                    }
                   >
                     <span className="font-mono">
                       {serverNotifications.length - index}.{" "}
                       {notification.method}
                     </span>
-                    <span>{expandedNotifications[index] ? "▼" : "▶"}</span>
+                    <span>
+                      {expandedNotifications[
+                        serverNotifications.length - 1 - index
+                      ]
+                        ? "▼"
+                        : "▶"}
+                    </span>
                   </div>
-                  {expandedNotifications[index] && (
+                  {expandedNotifications[
+                    serverNotifications.length - 1 - index
+                  ] && (
                     <div className="mt-2">
                       <div className="flex justify-between items-center mb-1">
                         <span className="font-semibold text-purple-600">
diff --git a/client/src/components/OAuthFlowProgress.tsx b/client/src/components/OAuthFlowProgress.tsx
index b9b67c6c..0e260556 100644
--- a/client/src/components/OAuthFlowProgress.tsx
+++ b/client/src/components/OAuthFlowProgress.tsx
@@ -156,7 +156,7 @@ export const OAuthFlowProgress = ({
               {authState.resourceMetadataError && (
                 <div className="mt-2 p-3 border border-blue-300 bg-blue-50 rounded-md">
                   <p className="text-sm font-medium text-blue-700">
-                    ℹ️ No resource metadata available from{" "}
+                    ℹ️ Problem with resource metadata from{" "}
                     <a
                       href={
                         new URL(
diff --git a/client/src/components/PromptsTab.tsx b/client/src/components/PromptsTab.tsx
index 66c15d8f..466b3d52 100644
--- a/client/src/components/PromptsTab.tsx
+++ b/client/src/components/PromptsTab.tsx
@@ -98,12 +98,12 @@ const PromptsTab = ({
             setPromptArgs({});
           }}
           renderItem={(prompt) => (
-            <>
+            <div className="flex flex-col items-start">
               <span className="flex-1">{prompt.name}</span>
-              <span className="text-sm text-gray-500">
+              <span className="text-sm text-gray-500 text-left">
                 {prompt.description}
               </span>
-            </>
+            </div>
           )}
           title="Prompts"
           buttonText={nextCursor ? "List More Prompts" : "List Prompts"}
diff --git a/client/src/components/ToolsTab.tsx b/client/src/components/ToolsTab.tsx
index 8a7f6578..9e4bc69a 100644
--- a/client/src/components/ToolsTab.tsx
+++ b/client/src/components/ToolsTab.tsx
@@ -7,7 +7,7 @@ import { TabsContent } from "@/components/ui/tabs";
 import { Textarea } from "@/components/ui/textarea";
 import DynamicJsonForm from "./DynamicJsonForm";
 import type { JsonValue, JsonSchemaType } from "@/utils/jsonUtils";
-import { generateDefaultValue } from "@/utils/schemaUtils";
+import { generateDefaultValue, isPropertyRequired } from "@/utils/schemaUtils";
 import {
   CompatibilityCallToolResult,
   ListToolsResult,
@@ -48,7 +48,11 @@ const ToolsTab = ({
       selectedTool?.inputSchema.properties ?? [],
     ).map(([key, value]) => [
       key,
-      generateDefaultValue(value as JsonSchemaType),
+      generateDefaultValue(
+        value as JsonSchemaType,
+        key,
+        selectedTool?.inputSchema as JsonSchemaType,
+      ),
     ]);
     setParams(Object.fromEntries(params));
   }, [selectedTool]);
@@ -92,6 +96,9 @@ const ToolsTab = ({
                 {Object.entries(selectedTool.inputSchema.properties ?? []).map(
                   ([key, value]) => {
                     const prop = value as JsonSchemaType;
+                    const inputSchema =
+                      selectedTool.inputSchema as JsonSchemaType;
+                    const required = isPropertyRequired(key, inputSchema);
                     return (
                       <div key={key}>
                         <Label
@@ -99,6 +106,9 @@ const ToolsTab = ({
                           className="block text-sm font-medium text-gray-700 dark:text-gray-300"
                         >
                           {key}
+                          {required && (
+                            <span className="text-red-500 ml-1">*</span>
+                          )}
                         </Label>
                         {prop.type === "boolean" ? (
                           <div className="flex items-center space-x-2 mt-2">
@@ -163,12 +173,13 @@ const ToolsTab = ({
                             name={key}
                             placeholder={prop.description}
                             value={(params[key] as string) ?? ""}
-                            onChange={(e) =>
+                            onChange={(e) => {
+                              const value = e.target.value;
                               setParams({
                                 ...params,
-                                [key]: Number(e.target.value),
-                              })
-                            }
+                                [key]: value === "" ? "" : Number(value),
+                              });
+                            }}
                             className="mt-1"
                           />
                         ) : (
diff --git a/client/src/components/__tests__/AuthDebugger.test.tsx b/client/src/components/__tests__/AuthDebugger.test.tsx
index eb7ff3ba..fa9f2f7d 100644
--- a/client/src/components/__tests__/AuthDebugger.test.tsx
+++ b/client/src/components/__tests__/AuthDebugger.test.tsx
@@ -41,6 +41,7 @@ jest.mock("@modelcontextprotocol/sdk/client/auth.js", () => ({
   startAuthorization: jest.fn(),
   exchangeAuthorization: jest.fn(),
   discoverOAuthProtectedResourceMetadata: jest.fn(),
+  selectResourceURL: jest.fn(),
 }));
 
 // Import the functions to get their types
@@ -88,7 +89,7 @@ describe("AuthDebugger", () => {
   const defaultAuthState = EMPTY_DEBUGGER_STATE;
 
   const defaultProps = {
-    serverUrl: "https://example.com",
+    serverUrl: "https://example.com/mcp",
     onBack: jest.fn(),
     authState: defaultAuthState,
     updateAuthState: jest.fn(),
@@ -203,7 +204,7 @@ describe("AuthDebugger", () => {
 
       // Should first discover and save OAuth metadata
       expect(mockDiscoverOAuthMetadata).toHaveBeenCalledWith(
-        new URL("https://example.com"),
+        new URL("https://example.com/"),
       );
 
       // Check that updateAuthState was called with the right info message
@@ -320,6 +321,7 @@ describe("AuthDebugger", () => {
         isInitiatingAuth: false,
         resourceMetadata: null,
         resourceMetadataError: null,
+        resource: null,
         oauthTokens: null,
         oauthStep: "metadata_discovery",
         latestError: null,
@@ -361,7 +363,7 @@ describe("AuthDebugger", () => {
       });
 
       expect(mockDiscoverOAuthMetadata).toHaveBeenCalledWith(
-        new URL("https://example.com"),
+        new URL("https://example.com/"),
       );
     });
 
@@ -496,11 +498,11 @@ describe("AuthDebugger", () => {
     it("should successfully fetch and display protected resource metadata", async () => {
       const updateAuthState = jest.fn();
       const mockResourceMetadata = {
-        resource: "https://example.com/api",
+        resource: "https://example.com/mcp",
         authorization_servers: ["https://custom-auth.example.com"],
         bearer_methods_supported: ["header", "body"],
-        resource_documentation: "https://example.com/api/docs",
-        resource_policy_uri: "https://example.com/api/policy",
+        resource_documentation: "https://example.com/mcp/docs",
+        resource_policy_uri: "https://example.com/mcp/policy",
       };
 
       // Mock successful metadata discovery
@@ -538,7 +540,7 @@ describe("AuthDebugger", () => {
       // Wait for the metadata to be fetched
       await waitFor(() => {
         expect(mockDiscoverOAuthProtectedResourceMetadata).toHaveBeenCalledWith(
-          "https://example.com",
+          "https://example.com/mcp",
         );
       });
 
@@ -584,7 +586,7 @@ describe("AuthDebugger", () => {
       // Wait for the metadata fetch to fail
       await waitFor(() => {
         expect(mockDiscoverOAuthProtectedResourceMetadata).toHaveBeenCalledWith(
-          "https://example.com",
+          "https://example.com/mcp",
         );
       });
 
@@ -594,7 +596,7 @@ describe("AuthDebugger", () => {
           expect.objectContaining({
             resourceMetadataError: mockError,
             // Should use the original server URL as fallback
-            authServerUrl: new URL("https://example.com"),
+            authServerUrl: new URL("https://example.com/"),
             oauthStep: "client_registration",
           }),
         );
@@ -602,7 +604,7 @@ describe("AuthDebugger", () => {
 
       // Verify that regular OAuth metadata discovery was still called
       expect(mockDiscoverOAuthMetadata).toHaveBeenCalledWith(
-        new URL("https://example.com"),
+        new URL("https://example.com/"),
       );
     });
   });
diff --git a/client/src/components/__tests__/DynamicJsonForm.array.test.tsx b/client/src/components/__tests__/DynamicJsonForm.array.test.tsx
new file mode 100644
index 00000000..00a324bf
--- /dev/null
+++ b/client/src/components/__tests__/DynamicJsonForm.array.test.tsx
@@ -0,0 +1,256 @@
+import { render, screen, fireEvent } from "@testing-library/react";
+import { describe, it, expect, jest } from "@jest/globals";
+import DynamicJsonForm from "../DynamicJsonForm";
+import type { JsonSchemaType } from "@/utils/jsonUtils";
+
+describe("DynamicJsonForm Array Fields", () => {
+  const renderSimpleArrayForm = (props = {}) => {
+    const defaultProps = {
+      schema: {
+        type: "array" as const,
+        description: "Test array field",
+        items: {
+          type: "string" as const,
+          description: "Array item",
+        },
+      } satisfies JsonSchemaType,
+      value: [],
+      onChange: jest.fn(),
+    };
+    return render(<DynamicJsonForm {...defaultProps} {...props} />);
+  };
+
+  const renderComplexArrayForm = (props = {}) => {
+    const defaultProps = {
+      schema: {
+        type: "array" as const,
+        description: "Test complex array field",
+        items: {
+          type: "object" as const,
+          properties: {
+            nested: { type: "object" as const },
+          },
+        },
+      } satisfies JsonSchemaType,
+      value: [],
+      onChange: jest.fn(),
+    };
+    return render(<DynamicJsonForm {...defaultProps} {...props} />);
+  };
+
+  describe("Simple Array Rendering", () => {
+    it("should render form fields for simple array items", () => {
+      renderSimpleArrayForm({ value: ["item1", "item2"] });
+
+      // Should show array description
+      expect(screen.getByText("Test array field")).toBeDefined();
+      expect(screen.getByText("Items: Array item")).toBeDefined();
+
+      // Should show input fields for each item
+      const inputs = screen.getAllByRole("textbox");
+      expect(inputs).toHaveLength(2);
+      expect(inputs[0]).toHaveProperty("value", "item1");
+      expect(inputs[1]).toHaveProperty("value", "item2");
+
+      // Should show remove buttons
+      const removeButtons = screen.getAllByText("Remove");
+      expect(removeButtons).toHaveLength(2);
+
+      // Should show add button
+      expect(screen.getByText("Add Item")).toBeDefined();
+    });
+
+    it("should add new items when Add Item button is clicked", () => {
+      const onChange = jest.fn();
+      renderSimpleArrayForm({ value: ["item1"], onChange });
+
+      const addButton = screen.getByText("Add Item");
+      fireEvent.click(addButton);
+
+      expect(onChange).toHaveBeenCalledWith(["item1", ""]);
+    });
+
+    it("should remove items when Remove button is clicked", () => {
+      const onChange = jest.fn();
+      renderSimpleArrayForm({ value: ["item1", "item2"], onChange });
+
+      const removeButtons = screen.getAllByText("Remove");
+      fireEvent.click(removeButtons[0]);
+
+      expect(onChange).toHaveBeenCalledWith(["item2"]);
+    });
+
+    it("should update item values when input changes", () => {
+      const onChange = jest.fn();
+      renderSimpleArrayForm({ value: ["item1"], onChange });
+
+      const input = screen.getByRole("textbox");
+      fireEvent.change(input, { target: { value: "updated item" } });
+
+      expect(onChange).toHaveBeenCalledWith(["updated item"]);
+    });
+
+    it("should handle empty arrays", () => {
+      renderSimpleArrayForm({ value: [] });
+
+      // Should show description and add button but no items
+      expect(screen.getByText("Test array field")).toBeDefined();
+      expect(screen.getByText("Add Item")).toBeDefined();
+      expect(screen.queryByText("Remove")).toBeNull();
+    });
+  });
+
+  describe("Complex Array Fallback", () => {
+    it("should render JSON editor for complex arrays", () => {
+      renderComplexArrayForm();
+
+      // Should render as JSON editor (textarea)
+      const textarea = screen.getByRole("textbox");
+      expect(textarea).toHaveProperty("type", "textarea");
+
+      // Should not show form-specific array controls
+      expect(screen.queryByText("Add Item")).toBeNull();
+      expect(screen.queryByText("Remove")).toBeNull();
+    });
+  });
+
+  describe("Array Type Detection", () => {
+    it("should detect string arrays as simple", () => {
+      const schema = {
+        type: "array" as const,
+        items: { type: "string" as const },
+      };
+      renderSimpleArrayForm({ schema, value: ["test"] });
+
+      // Should render form fields, not JSON editor
+      expect(screen.getByRole("textbox")).not.toHaveProperty(
+        "type",
+        "textarea",
+      );
+    });
+
+    it("should detect number arrays as simple", () => {
+      const schema = {
+        type: "array" as const,
+        items: { type: "number" as const },
+      };
+      renderSimpleArrayForm({ schema, value: [1, 2] });
+
+      // Should render form fields (number inputs)
+      const inputs = screen.getAllByRole("spinbutton");
+      expect(inputs).toHaveLength(2);
+    });
+
+    it("should detect boolean arrays as simple", () => {
+      const schema = {
+        type: "array" as const,
+        items: { type: "boolean" as const },
+      };
+      renderSimpleArrayForm({ schema, value: [true, false] });
+
+      // Should render form fields (checkboxes)
+      const checkboxes = screen.getAllByRole("checkbox");
+      expect(checkboxes).toHaveLength(2);
+    });
+
+    it("should detect simple object arrays as simple", () => {
+      const schema = {
+        type: "array" as const,
+        items: {
+          type: "object" as const,
+          properties: {
+            name: { type: "string" as const },
+            age: { type: "number" as const },
+          },
+        },
+      };
+      renderSimpleArrayForm({ schema, value: [{ name: "John", age: 30 }] });
+
+      // Should render form fields for simple objects
+      expect(screen.getByText("Add Item")).toBeDefined();
+      expect(screen.getByText("Remove")).toBeDefined();
+    });
+  });
+
+  describe("Array with Different Item Types", () => {
+    it("should handle integer array items", () => {
+      const schema = {
+        type: "array" as const,
+        items: { type: "integer" as const },
+      };
+      const onChange = jest.fn();
+      renderSimpleArrayForm({ schema, value: [1, 2], onChange });
+
+      const inputs = screen.getAllByRole("spinbutton");
+      expect(inputs).toHaveLength(2);
+      expect(inputs[0]).toHaveProperty("value", "1");
+      expect(inputs[1]).toHaveProperty("value", "2");
+
+      // Test adding new integer item
+      const addButton = screen.getByText("Add Item");
+      fireEvent.click(addButton);
+      expect(onChange).toHaveBeenCalledWith([1, 2, 0]);
+    });
+
+    it("should handle boolean array items", () => {
+      const schema = {
+        type: "array" as const,
+        items: { type: "boolean" as const },
+      };
+      const onChange = jest.fn();
+      renderSimpleArrayForm({ schema, value: [true, false], onChange });
+
+      const checkboxes = screen.getAllByRole("checkbox");
+      expect(checkboxes).toHaveLength(2);
+      expect(checkboxes[0]).toHaveProperty("checked", true);
+      expect(checkboxes[1]).toHaveProperty("checked", false);
+
+      // Test adding new boolean item
+      const addButton = screen.getByText("Add Item");
+      fireEvent.click(addButton);
+      expect(onChange).toHaveBeenCalledWith([true, false, false]);
+    });
+  });
+
+  describe("Array Item Descriptions", () => {
+    it("should show item description when available", () => {
+      const schema = {
+        type: "array" as const,
+        description: "List of names",
+        items: {
+          type: "string" as const,
+          description: "Person name",
+        },
+      };
+      renderSimpleArrayForm({ schema });
+
+      expect(screen.getByText("List of names")).toBeDefined();
+      expect(screen.getByText("Items: Person name")).toBeDefined();
+    });
+
+    it("should use item description in add button title", () => {
+      const schema = {
+        type: "array" as const,
+        items: {
+          type: "string" as const,
+          description: "Email address",
+        },
+      };
+      renderSimpleArrayForm({ schema });
+
+      const addButton = screen.getByText("Add Item");
+      expect(addButton).toHaveProperty("title", "Add new Email address");
+    });
+
+    it("should use default title when no item description", () => {
+      const schema = {
+        type: "array" as const,
+        items: { type: "string" as const },
+      };
+      renderSimpleArrayForm({ schema });
+
+      const addButton = screen.getByText("Add Item");
+      expect(addButton).toHaveProperty("title", "Add new item");
+    });
+  });
+});
diff --git a/client/src/components/__tests__/HistoryAndNotifications.test.tsx b/client/src/components/__tests__/HistoryAndNotifications.test.tsx
new file mode 100644
index 00000000..42c58519
--- /dev/null
+++ b/client/src/components/__tests__/HistoryAndNotifications.test.tsx
@@ -0,0 +1,226 @@
+import { render, screen, fireEvent } from "@testing-library/react";
+import { describe, it, expect, jest } from "@jest/globals";
+import HistoryAndNotifications from "../HistoryAndNotifications";
+import { ServerNotification } from "@modelcontextprotocol/sdk/types.js";
+
+// Mock JsonView component
+jest.mock("../JsonView", () => {
+  return function JsonView({ data }: { data: string }) {
+    return <div data-testid="json-view">{data}</div>;
+  };
+});
+
+describe("HistoryAndNotifications", () => {
+  const mockRequestHistory = [
+    {
+      request: JSON.stringify({ method: "test/method1", params: {} }),
+      response: JSON.stringify({ result: "success" }),
+    },
+    {
+      request: JSON.stringify({ method: "test/method2", params: {} }),
+      response: JSON.stringify({ result: "success" }),
+    },
+  ];
+
+  const mockNotifications: ServerNotification[] = [
+    {
+      method: "notifications/message",
+      params: {
+        level: "info" as const,
+        message: "First notification",
+      },
+    },
+    {
+      method: "notifications/progress",
+      params: {
+        progressToken: "test-token",
+        progress: 50,
+        message: "Second notification",
+      },
+    },
+  ];
+
+  it("renders history and notifications sections", () => {
+    render(
+      <HistoryAndNotifications
+        requestHistory={mockRequestHistory}
+        serverNotifications={mockNotifications}
+      />,
+    );
+
+    expect(screen.getByText("History")).toBeTruthy();
+    expect(screen.getByText("Server Notifications")).toBeTruthy();
+  });
+
+  it("displays request history items with correct numbering", () => {
+    render(
+      <HistoryAndNotifications
+        requestHistory={mockRequestHistory}
+        serverNotifications={[]}
+      />,
+    );
+
+    // Items should be numbered in reverse order (newest first)
+    expect(screen.getByText("2. test/method2")).toBeTruthy();
+    expect(screen.getByText("1. test/method1")).toBeTruthy();
+  });
+
+  it("displays server notifications with correct numbering", () => {
+    render(
+      <HistoryAndNotifications
+        requestHistory={[]}
+        serverNotifications={mockNotifications}
+      />,
+    );
+
+    // Items should be numbered in reverse order (newest first)
+    expect(screen.getByText("2. notifications/progress")).toBeTruthy();
+    expect(screen.getByText("1. notifications/message")).toBeTruthy();
+  });
+
+  it("expands and collapses request items when clicked", () => {
+    render(
+      <HistoryAndNotifications
+        requestHistory={mockRequestHistory}
+        serverNotifications={[]}
+      />,
+    );
+
+    const firstRequestHeader = screen.getByText("2. test/method2");
+
+    // Initially collapsed - should show ▶ arrows (there are multiple)
+    expect(screen.getAllByText("▶")).toHaveLength(2);
+    expect(screen.queryByText("Request:")).toBeNull();
+
+    // Click to expand
+    fireEvent.click(firstRequestHeader);
+
+    // Should now be expanded - one ▼ and one ▶
+    expect(screen.getByText("▼")).toBeTruthy();
+    expect(screen.getAllByText("▶")).toHaveLength(1);
+    expect(screen.getByText("Request:")).toBeTruthy();
+    expect(screen.getByText("Response:")).toBeTruthy();
+  });
+
+  it("expands and collapses notification items when clicked", () => {
+    render(
+      <HistoryAndNotifications
+        requestHistory={[]}
+        serverNotifications={mockNotifications}
+      />,
+    );
+
+    const firstNotificationHeader = screen.getByText(
+      "2. notifications/progress",
+    );
+
+    // Initially collapsed
+    expect(screen.getAllByText("▶")).toHaveLength(2);
+    expect(screen.queryByText("Details:")).toBeNull();
+
+    // Click to expand
+    fireEvent.click(firstNotificationHeader);
+
+    // Should now be expanded
+    expect(screen.getByText("▼")).toBeTruthy();
+    expect(screen.getAllByText("▶")).toHaveLength(1);
+    expect(screen.getByText("Details:")).toBeTruthy();
+  });
+
+  it("maintains expanded state when new notifications are added", () => {
+    const { rerender } = render(
+      <HistoryAndNotifications
+        requestHistory={[]}
+        serverNotifications={mockNotifications}
+      />,
+    );
+
+    // Find and expand the older notification (should be "1. notifications/message")
+    const olderNotificationHeader = screen.getByText(
+      "1. notifications/message",
+    );
+    fireEvent.click(olderNotificationHeader);
+
+    // Verify it's expanded
+    expect(screen.getByText("Details:")).toBeTruthy();
+
+    // Add a new notification at the beginning (simulating real behavior)
+    const newNotifications: ServerNotification[] = [
+      {
+        method: "notifications/resources/updated",
+        params: { uri: "file://test.txt" },
+      },
+      ...mockNotifications,
+    ];
+
+    // Re-render with new notifications
+    rerender(
+      <HistoryAndNotifications
+        requestHistory={[]}
+        serverNotifications={newNotifications}
+      />,
+    );
+
+    // The original notification should still be expanded
+    // It's now numbered as "2. notifications/message" due to the new item
+    expect(screen.getByText("3. notifications/progress")).toBeTruthy();
+    expect(screen.getByText("2. notifications/message")).toBeTruthy();
+    expect(screen.getByText("1. notifications/resources/updated")).toBeTruthy();
+
+    // The originally expanded notification should still show its details
+    expect(screen.getByText("Details:")).toBeTruthy();
+  });
+
+  it("maintains expanded state when new requests are added", () => {
+    const { rerender } = render(
+      <HistoryAndNotifications
+        requestHistory={mockRequestHistory}
+        serverNotifications={[]}
+      />,
+    );
+
+    // Find and expand the older request (should be "1. test/method1")
+    const olderRequestHeader = screen.getByText("1. test/method1");
+    fireEvent.click(olderRequestHeader);
+
+    // Verify it's expanded
+    expect(screen.getByText("Request:")).toBeTruthy();
+    expect(screen.getByText("Response:")).toBeTruthy();
+
+    // Add a new request at the beginning
+    const newRequestHistory = [
+      {
+        request: JSON.stringify({ method: "test/new_method", params: {} }),
+        response: JSON.stringify({ result: "new success" }),
+      },
+      ...mockRequestHistory,
+    ];
+
+    // Re-render with new request history
+    rerender(
+      <HistoryAndNotifications
+        requestHistory={newRequestHistory}
+        serverNotifications={[]}
+      />,
+    );
+
+    // The original request should still be expanded
+    // It's now numbered as "2. test/method1" due to the new item
+    expect(screen.getByText("3. test/method2")).toBeTruthy();
+    expect(screen.getByText("2. test/method1")).toBeTruthy();
+    expect(screen.getByText("1. test/new_method")).toBeTruthy();
+
+    // The originally expanded request should still show its details
+    expect(screen.getByText("Request:")).toBeTruthy();
+    expect(screen.getByText("Response:")).toBeTruthy();
+  });
+
+  it("displays empty state messages when no data is available", () => {
+    render(
+      <HistoryAndNotifications requestHistory={[]} serverNotifications={[]} />,
+    );
+
+    expect(screen.getByText("No history yet")).toBeTruthy();
+    expect(screen.getByText("No notifications yet")).toBeTruthy();
+  });
+});
diff --git a/client/src/components/__tests__/ToolsTab.test.tsx b/client/src/components/__tests__/ToolsTab.test.tsx
index c9f9b315..dc353ba5 100644
--- a/client/src/components/__tests__/ToolsTab.test.tsx
+++ b/client/src/components/__tests__/ToolsTab.test.tsx
@@ -111,6 +111,27 @@ describe("ToolsTab", () => {
     });
   });
 
+  it("should allow typing negative numbers", async () => {
+    renderToolsTab({
+      selectedTool: mockTools[0],
+    });
+
+    const input = screen.getByRole("spinbutton") as HTMLInputElement;
+
+    // Complete the negative number
+    fireEvent.change(input, { target: { value: "-42" } });
+    expect(input.value).toBe("-42");
+
+    const submitButton = screen.getByRole("button", { name: /run tool/i });
+    await act(async () => {
+      fireEvent.click(submitButton);
+    });
+
+    expect(defaultProps.callTool).toHaveBeenCalledWith(mockTools[0].name, {
+      num: -42,
+    });
+  });
+
   it("should disable button and change text while tool is running", async () => {
     // Create a promise that we can resolve later
     let resolvePromise: ((value: unknown) => void) | undefined;
diff --git a/client/src/lib/auth-types.ts b/client/src/lib/auth-types.ts
index 5e8113ef..f8f927c6 100644
--- a/client/src/lib/auth-types.ts
+++ b/client/src/lib/auth-types.ts
@@ -30,6 +30,7 @@ export interface AuthDebuggerState {
   oauthStep: OAuthStep;
   resourceMetadata: OAuthProtectedResourceMetadata | null;
   resourceMetadataError: Error | null;
+  resource: URL | null;
   authServerUrl: URL | null;
   oauthMetadata: OAuthMetadata | null;
   oauthClientInfo: OAuthClientInformationFull | OAuthClientInformation | null;
@@ -47,6 +48,7 @@ export const EMPTY_DEBUGGER_STATE: AuthDebuggerState = {
   oauthMetadata: null,
   resourceMetadata: null,
   resourceMetadataError: null,
+  resource: null,
   authServerUrl: null,
   oauthClientInfo: null,
   authorizationUrl: null,
diff --git a/client/src/lib/oauth-state-machine.ts b/client/src/lib/oauth-state-machine.ts
index 5f10a783..d87b3ecd 100644
--- a/client/src/lib/oauth-state-machine.ts
+++ b/client/src/lib/oauth-state-machine.ts
@@ -6,6 +6,7 @@ import {
   startAuthorization,
   exchangeAuthorization,
   discoverOAuthProtectedResourceMetadata,
+  selectResourceURL,
 } from "@modelcontextprotocol/sdk/client/auth.js";
 import {
   OAuthMetadataSchema,
@@ -29,17 +30,15 @@ export const oauthTransitions: Record<OAuthStep, StateTransition> = {
   metadata_discovery: {
     canTransition: async () => true,
     execute: async (context) => {
-      let authServerUrl = new URL(context.serverUrl);
+      // Default to discovering from the server's URL
+      let authServerUrl = new URL("/", context.serverUrl);
       let resourceMetadata: OAuthProtectedResourceMetadata | null = null;
       let resourceMetadataError: Error | null = null;
       try {
         resourceMetadata = await discoverOAuthProtectedResourceMetadata(
           context.serverUrl,
         );
-        if (
-          resourceMetadata &&
-          resourceMetadata.authorization_servers?.length
-        ) {
+        if (resourceMetadata?.authorization_servers?.length) {
           authServerUrl = new URL(resourceMetadata.authorization_servers[0]);
         }
       } catch (e) {
@@ -50,6 +49,13 @@ export const oauthTransitions: Record<OAuthStep, StateTransition> = {
         }
       }
 
+      const resource: URL | undefined = await selectResourceURL(
+        context.serverUrl,
+        context.provider,
+        // we default to null, so swap it for undefined if not set
+        resourceMetadata ?? undefined,
+      );
+
       const metadata = await discoverOAuthMetadata(authServerUrl);
       if (!metadata) {
         throw new Error("Failed to discover OAuth metadata");
@@ -58,6 +64,7 @@ export const oauthTransitions: Record<OAuthStep, StateTransition> = {
       context.provider.saveServerMetadata(parsedMetadata);
       context.updateState({
         resourceMetadata,
+        resource,
         resourceMetadataError,
         authServerUrl,
         oauthMetadata: parsedMetadata,
@@ -113,6 +120,7 @@ export const oauthTransitions: Record<OAuthStep, StateTransition> = {
           clientInformation,
           redirectUrl: context.provider.redirectUrl,
           scope,
+          resource: context.state.resource ?? undefined,
         },
       );
 
@@ -163,6 +171,7 @@ export const oauthTransitions: Record<OAuthStep, StateTransition> = {
         authorizationCode: context.state.authorizationCode,
         codeVerifier,
         redirectUri: context.provider.redirectUrl,
+        resource: context.state.resource ?? undefined,
       });
 
       context.provider.saveTokens(tokens);
diff --git a/client/src/utils/__tests__/schemaUtils.test.ts b/client/src/utils/__tests__/schemaUtils.test.ts
index ca6b65ca..133e25ec 100644
--- a/client/src/utils/__tests__/schemaUtils.test.ts
+++ b/client/src/utils/__tests__/schemaUtils.test.ts
@@ -11,72 +11,68 @@ import type { Tool } from "@modelcontextprotocol/sdk/types.js";
 
 describe("generateDefaultValue", () => {
   test("generates default string", () => {
-    expect(generateDefaultValue({ type: "string", required: true })).toBe("");
+    const parentSchema = { type: "object" as const, required: ["testProp"] };
+    expect(
+      generateDefaultValue({ type: "string" }, "testProp", parentSchema),
+    ).toBe("");
   });
 
   test("generates default number", () => {
-    expect(generateDefaultValue({ type: "number", required: true })).toBe(0);
+    const parentSchema = { type: "object" as const, required: ["testProp"] };
+    expect(
+      generateDefaultValue({ type: "number" }, "testProp", parentSchema),
+    ).toBe(0);
   });
 
   test("generates default integer", () => {
-    expect(generateDefaultValue({ type: "integer", required: true })).toBe(0);
+    const parentSchema = { type: "object" as const, required: ["testProp"] };
+    expect(
+      generateDefaultValue({ type: "integer" }, "testProp", parentSchema),
+    ).toBe(0);
   });
 
   test("generates default boolean", () => {
-    expect(generateDefaultValue({ type: "boolean", required: true })).toBe(
-      false,
-    );
+    const parentSchema = { type: "object" as const, required: ["testProp"] };
+    expect(
+      generateDefaultValue({ type: "boolean" }, "testProp", parentSchema),
+    ).toBe(false);
   });
 
   test("generates default array", () => {
-    expect(generateDefaultValue({ type: "array", required: true })).toEqual([]);
+    expect(generateDefaultValue({ type: "array" })).toEqual([]);
   });
 
   test("generates default empty object", () => {
-    expect(generateDefaultValue({ type: "object", required: true })).toEqual(
-      {},
-    );
+    expect(generateDefaultValue({ type: "object" })).toEqual({});
   });
 
   test("generates default null for unknown types", () => {
     // @ts-expect-error Testing with invalid type
-    expect(generateDefaultValue({ type: "unknown", required: true })).toBe(
-      null,
-    );
+    expect(generateDefaultValue({ type: "unknown" })).toBe(undefined);
   });
 
   test("generates empty array for non-required array", () => {
-    expect(generateDefaultValue({ type: "array", required: false })).toEqual(
-      [],
-    );
+    expect(generateDefaultValue({ type: "array" })).toEqual([]);
   });
 
   test("generates empty object for non-required object", () => {
-    expect(generateDefaultValue({ type: "object", required: false })).toEqual(
-      {},
-    );
+    expect(generateDefaultValue({ type: "object" })).toEqual({});
   });
 
-  test("generates null for non-required primitive types", () => {
-    expect(generateDefaultValue({ type: "string", required: false })).toBe(
-      undefined,
-    );
-    expect(generateDefaultValue({ type: "number", required: false })).toBe(
-      undefined,
-    );
-    expect(generateDefaultValue({ type: "boolean", required: false })).toBe(
-      undefined,
-    );
+  test("generates undefined for non-required primitive types", () => {
+    expect(generateDefaultValue({ type: "string" })).toBe(undefined);
+    expect(generateDefaultValue({ type: "number" })).toBe(undefined);
+    expect(generateDefaultValue({ type: "boolean" })).toBe(undefined);
   });
 
   test("generates object with properties", () => {
     const schema: JsonSchemaType = {
       type: "object",
-      required: true,
+      required: ["name", "age", "isActive"],
       properties: {
-        name: { type: "string", required: true },
-        age: { type: "number", required: true },
-        isActive: { type: "boolean", required: true },
+        name: { type: "string" },
+        age: { type: "number" },
+        isActive: { type: "boolean" },
       },
     };
     expect(generateDefaultValue(schema)).toEqual({
@@ -89,18 +85,18 @@ describe("generateDefaultValue", () => {
   test("handles nested objects", () => {
     const schema: JsonSchemaType = {
       type: "object",
-      required: true,
+      required: ["user"],
       properties: {
         user: {
           type: "object",
-          required: true,
+          required: ["name", "address"],
           properties: {
-            name: { type: "string", required: true },
+            name: { type: "string" },
             address: {
               type: "object",
-              required: true,
+              required: ["city"],
               properties: {
-                city: { type: "string", required: true },
+                city: { type: "string" },
               },
             },
           },
diff --git a/client/src/utils/configUtils.ts b/client/src/utils/configUtils.ts
index 40e47a94..418f0007 100644
--- a/client/src/utils/configUtils.ts
+++ b/client/src/utils/configUtils.ts
@@ -4,12 +4,27 @@ import {
   DEFAULT_INSPECTOR_CONFIG,
 } from "@/lib/constants";
 
+const getSearchParam = (key: string): string | null => {
+  try {
+    const url = new URL(window.location.href);
+    return url.searchParams.get(key);
+  } catch {
+    return null;
+  }
+};
+
 export const getMCPProxyAddress = (config: InspectorConfig): string => {
-  const proxyFullAddress = config.MCP_PROXY_FULL_ADDRESS.value as string;
+  let proxyFullAddress = config.MCP_PROXY_FULL_ADDRESS.value as string;
   if (proxyFullAddress) {
+    proxyFullAddress = proxyFullAddress.replace(/\/+$/, "");
     return proxyFullAddress;
   }
-  return `${window.location.protocol}//${window.location.hostname}:${DEFAULT_MCP_PROXY_LISTEN_PORT}`;
+
+  // Check for proxy port from query params, fallback to default
+  const proxyPort =
+    getSearchParam("MCP_PROXY_PORT") || DEFAULT_MCP_PROXY_LISTEN_PORT;
+
+  return `${window.location.protocol}//${window.location.hostname}:${proxyPort}`;
 };
 
 export const getMCPServerRequestTimeout = (config: InspectorConfig): number => {
@@ -40,15 +55,6 @@ export const getMCPProxyAuthToken = (
   };
 };
 
-const getSearchParam = (key: string): string | null => {
-  try {
-    const url = new URL(window.location.href);
-    return url.searchParams.get(key);
-  } catch {
-    return null;
-  }
-};
-
 export const getInitialTransportType = ():
   | "stdio"
   | "sse"
diff --git a/client/src/utils/jsonUtils.ts b/client/src/utils/jsonUtils.ts
index 28cbf303..83317938 100644
--- a/client/src/utils/jsonUtils.ts
+++ b/client/src/utils/jsonUtils.ts
@@ -17,7 +17,7 @@ export type JsonSchemaType = {
     | "object"
     | "null";
   description?: string;
-  required?: boolean;
+  required?: string[];
   default?: JsonValue;
   properties?: Record<string, JsonSchemaType>;
   items?: JsonSchemaType;
diff --git a/client/src/utils/schemaUtils.ts b/client/src/utils/schemaUtils.ts
index 30210532..9fc7a724 100644
--- a/client/src/utils/schemaUtils.ts
+++ b/client/src/utils/schemaUtils.ts
@@ -81,46 +81,70 @@ export function hasOutputSchema(toolName: string): boolean {
 /**
  * Generates a default value based on a JSON schema type
  * @param schema The JSON schema definition
- * @returns A default value matching the schema type, or null for non-required fields
+ * @param propertyName Optional property name for checking if it's required in parent schema
+ * @param parentSchema Optional parent schema to check required array
+ * @returns A default value matching the schema type
  */
-export function generateDefaultValue(schema: JsonSchemaType): JsonValue {
-  if ("default" in schema) {
+export function generateDefaultValue(
+  schema: JsonSchemaType,
+  propertyName?: string,
+  parentSchema?: JsonSchemaType,
+): JsonValue {
+  if ("default" in schema && schema.default !== undefined) {
     return schema.default;
   }
 
-  if (!schema.required) {
-    if (schema.type === "array") return [];
-    if (schema.type === "object") return {};
-    return undefined;
-  }
+  // Check if this property is required in the parent schema
+  const isRequired =
+    propertyName && parentSchema
+      ? isPropertyRequired(propertyName, parentSchema)
+      : false;
 
   switch (schema.type) {
     case "string":
-      return "";
+      return isRequired ? "" : undefined;
     case "number":
     case "integer":
-      return 0;
+      return isRequired ? 0 : undefined;
     case "boolean":
-      return false;
+      return isRequired ? false : undefined;
     case "array":
       return [];
     case "object": {
       if (!schema.properties) return {};
 
       const obj: JsonObject = {};
-      Object.entries(schema.properties)
-        .filter(([, prop]) => prop.required)
-        .forEach(([key, prop]) => {
-          const value = generateDefaultValue(prop);
-          obj[key] = value;
-        });
+      // Only include properties that are required according to the schema's required array
+      Object.entries(schema.properties).forEach(([key, prop]) => {
+        if (isPropertyRequired(key, schema)) {
+          const value = generateDefaultValue(prop, key, schema);
+          if (value !== undefined) {
+            obj[key] = value;
+          }
+        }
+      });
       return obj;
     }
-    default:
+    case "null":
       return null;
+    default:
+      return undefined;
   }
 }
 
+/**
+ * Helper function to check if a property is required in a schema
+ * @param propertyName The name of the property to check
+ * @param schema The parent schema containing the required array
+ * @returns true if the property is required, false otherwise
+ */
+export function isPropertyRequired(
+  propertyName: string,
+  schema: JsonSchemaType,
+): boolean {
+  return schema.required?.includes(propertyName) ?? false;
+}
+
 /**
  * Formats a field key into a human-readable label
  * @param key The field key to format
diff --git a/package-lock.json b/package-lock.json
index b46e4597..075b0a28 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "@modelcontextprotocol/inspector",
-  "version": "0.14.2",
+  "version": "0.15.0",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "@modelcontextprotocol/inspector",
-      "version": "0.14.2",
+      "version": "0.15.0",
       "license": "MIT",
       "workspaces": [
         "client",
@@ -14,10 +14,10 @@
         "cli"
       ],
       "dependencies": {
-        "@modelcontextprotocol/inspector-cli": "^0.14.2",
-        "@modelcontextprotocol/inspector-client": "^0.14.2",
-        "@modelcontextprotocol/inspector-server": "^0.14.2",
-        "@modelcontextprotocol/sdk": "^1.12.1",
+        "@modelcontextprotocol/inspector-cli": "^0.15.0",
+        "@modelcontextprotocol/inspector-client": "^0.15.0",
+        "@modelcontextprotocol/inspector-server": "^0.15.0",
+        "@modelcontextprotocol/sdk": "^1.13.1",
         "concurrently": "^9.0.1",
         "open": "^10.1.0",
         "shell-quote": "^1.8.2",
@@ -29,6 +29,7 @@
         "mcp-inspector": "cli/build/cli.js"
       },
       "devDependencies": {
+        "@playwright/test": "^1.52.0",
         "@types/jest": "^29.5.14",
         "@types/node": "^22.7.5",
         "@types/shell-quote": "^1.7.5",
@@ -36,14 +37,17 @@
         "prettier": "3.3.3",
         "rimraf": "^6.0.1",
         "typescript": "^5.4.2"
+      },
+      "engines": {
+        "node": ">=22.7.5"
       }
     },
     "cli": {
       "name": "@modelcontextprotocol/inspector-cli",
-      "version": "0.14.2",
+      "version": "0.15.0",
       "license": "MIT",
       "dependencies": {
-        "@modelcontextprotocol/sdk": "^1.12.1",
+        "@modelcontextprotocol/sdk": "^1.13.1",
         "commander": "^13.1.0",
         "spawn-rx": "^5.1.2"
       },
@@ -63,10 +67,10 @@
     },
     "client": {
       "name": "@modelcontextprotocol/inspector-client",
-      "version": "0.14.2",
+      "version": "0.15.0",
       "license": "MIT",
       "dependencies": {
-        "@modelcontextprotocol/sdk": "^1.12.1",
+        "@modelcontextprotocol/sdk": "^1.13.1",
         "@radix-ui/react-checkbox": "^1.1.4",
         "@radix-ui/react-dialog": "^1.1.3",
         "@radix-ui/react-icons": "^1.3.0",
@@ -81,7 +85,7 @@
         "class-variance-authority": "^0.7.0",
         "clsx": "^2.1.1",
         "cmdk": "^1.0.4",
-        "lucide-react": "^0.447.0",
+        "lucide-react": "^0.523.0",
         "pkce-challenge": "^4.1.0",
         "prismjs": "^1.30.0",
         "react": "^18.3.1",
@@ -2005,9 +2009,9 @@
       "link": true
     },
     "node_modules/@modelcontextprotocol/sdk": {
-      "version": "1.12.1",
-      "resolved": "https://registry.npmjs.org/@modelcontextprotocol/sdk/-/sdk-1.12.1.tgz",
-      "integrity": "sha512-KG1CZhZfWg+u8pxeM/mByJDScJSrjjxLc8fwQqbsS8xCjBmQfMNEBTotYdNanKekepnfRI85GtgQlctLFpcYPw==",
+      "version": "1.13.1",
+      "resolved": "https://registry.npmjs.org/@modelcontextprotocol/sdk/-/sdk-1.13.1.tgz",
+      "integrity": "sha512-8q6+9aF0yA39/qWT/uaIj6zTpC+Qu07DnN/lb9mjoquCJsAh6l3HyYqc9O3t2j7GilseOQOQimLg7W3By6jqvg==",
       "dependencies": {
         "ajv": "^6.12.6",
         "content-type": "^1.0.5",
@@ -2070,6 +2074,22 @@
         "node": ">=14"
       }
     },
+    "node_modules/@playwright/test": {
+      "version": "1.52.0",
+      "resolved": "https://registry.npmjs.org/@playwright/test/-/test-1.52.0.tgz",
+      "integrity": "sha512-uh6W7sb55hl7D6vsAeA+V2p5JnlAqzhqFyF0VcJkKZXkgnFcVG9PziERRHQfPLfNGx1C292a4JqbWzhR8L4R1g==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright": "1.52.0"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@radix-ui/number": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/@radix-ui/number/-/number-1.1.1.tgz",
@@ -2083,12 +2103,12 @@
       "license": "MIT"
     },
     "node_modules/@radix-ui/react-arrow": {
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-      "integrity": "sha512-Ed2mlOmT+tktOsu2NZBK1bCSHh/uqULu1vWOkpQTVq53EoOuZUZw7FInQoDB3uil5wZc2oe0XN9a7uVZB7/6AQ==",
+      "version": "1.2.14",
+      "resolved": "https://registry.npmjs.org/@radix-ui/react-toast/-/react-toast-1.2.14.tgz",
+      "integrity": "sha512-nAP5FBxBJGQ/YfUB+r+O6USFVkWq3gAInkxyEnmvEV5jtSbfDhfa4hwX8CraCnbjMLsE7XSf/K75l9xXY7joWg==",
       "license": "MIT",
       "dependencies": {
         "@radix-ui/primitive": "1.1.2",
-        "@radix-ui/react-collection": "1.1.4",
+        "@radix-ui/react-collection": "1.1.7",
         "@radix-ui/react-compose-refs": "1.1.2",
         "@radix-ui/react-context": "1.1.2",
-        "@radix-ui/react-dismissable-layer": "1.1.7",
-        "@radix-ui/react-portal": "1.1.6",
+        "@radix-ui/react-dismissable-layer": "1.1.10",
+        "@radix-ui/react-portal": "1.1.9",
         "@radix-ui/react-presence": "1.1.4",
-        "@radix-ui/react-primitive": "2.1.0",
+        "@radix-ui/react-primitive": "2.1.3",
         "@radix-ui/react-use-callback-ref": "1.1.1",
         "@radix-ui/react-use-controllable-state": "1.2.2",
         "@radix-ui/react-use-layout-effect": "1.1.1",
-        "@radix-ui/react-visually-hidden": "1.2.0"
+        "@radix-ui/react-visually-hidden": "1.2.3"
       },
       "peerDependencies": {
         "@types/react": "*",
@@ -2656,23 +2676,23 @@
       }
     },
     "node_modules/@radix-ui/react-tooltip": {
-      "version": "1.2.4",
-      "resolved": "https://registry.npmjs.org/@radix-ui/react-tooltip/-/react-tooltip-1.2.4.tgz",
-      "integrity": "sha512-DyW8VVeeMSSLFvAmnVnCwvI3H+1tpJFHT50r+tdOoMse9XqYDBCcyux8u3G2y+LOpt7fPQ6KKH0mhs+ce1+Z5w==",
+      "version": "1.2.7",
+      "resolved": "https://registry.npmjs.org/@radix-ui/react-tooltip/-/react-tooltip-1.2.7.tgz",
+      "integrity": "sha512-Ap+fNYwKTYJ9pzqW+Xe2HtMRbQ/EeWkj2qykZ6SuEV4iS/o1bZI5ssJbk4D2r8XuDuOBVz/tIx2JObtuqU+5Zw==",
       "license": "MIT",
       "dependencies": {
         "@radix-ui/primitive": "1.1.2",
         "@radix-ui/react-compose-refs": "1.1.2",
         "@radix-ui/react-context": "1.1.2",
-        "@radix-ui/react-dismissable-layer": "1.1.7",
+        "@radix-ui/react-dismissable-layer": "1.1.10",
         "@radix-ui/react-id": "1.1.1",
-        "@radix-ui/react-popper": "1.2.4",
-        "@radix-ui/react-portal": "1.1.6",
+        "@radix-ui/react-popper": "1.2.7",
+        "@radix-ui/react-portal": "1.1.9",
         "@radix-ui/react-presence": "1.1.4",
-        "@radix-ui/react-primitive": "2.1.0",
-        "@radix-ui/react-slot": "1.2.0",
+        "@radix-ui/react-primitive": "2.1.3",
+        "@radix-ui/react-slot": "1.2.3",
         "@radix-ui/react-use-controllable-state": "1.2.2",
-        "@radix-ui/react-visually-hidden": "1.2.0"
+        "@radix-ui/react-visually-hidden": "1.2.3"
       },
       "peerDependencies": {
         "@types/react": "*",
@@ -2826,12 +2846,12 @@
       }
     },
     "node_modules/@radix-ui/react-visually-hidden": {
-      "version": "1.2.0",
-      "resolved": "https://registry.npmjs.org/@radix-ui/react-visually-hidden/-/react-visually-hidden-1.2.0.tgz",
-      "integrity": "sha512-rQj0aAWOpCdCMRbI6pLQm8r7S2BM3YhTa0SzOYD55k+hJA8oo9J+H+9wLM9oMlZWOX/wJWPTzfDfmZkf7LvCfg==",
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/@radix-ui/react-visually-hidden/-/react-visually-hidden-1.2.3.tgz",
+      "integrity": "sha512-pzJq12tEaaIhqjbzpCuv/OypJY/BPavOofm+dbab+MHLajy277+1lLm6JFcGgF5eskJ6mquGirhXY2GD/8u8Ug==",
       "license": "MIT",
       "dependencies": {
-        "@radix-ui/react-primitive": "2.1.0"
+        "@radix-ui/react-primitive": "2.1.3"
       },
       "peerDependencies": {
         "@types/react": "*",
@@ -7843,12 +7863,12 @@
       }
     },
     "node_modules/lucide-react": {
-      "version": "0.447.0",
-      "resolved": "https://registry.npmjs.org/lucide-react/-/lucide-react-0.447.0.tgz",
-      "integrity": "sha512-SZ//hQmvi+kDKrNepArVkYK7/jfeZ5uFNEnYmd45RKZcbGD78KLnrcNXmgeg6m+xNHFvTG+CblszXCy4n6DN4w==",
+      "version": "0.523.0",
+      "resolved": "https://registry.npmjs.org/lucide-react/-/lucide-react-0.523.0.tgz",
+      "integrity": "sha512-rUjQoy7egZT9XYVXBK1je9ckBnNp7qzRZOhLQx5RcEp2dCGlXo+mv6vf7Am4LimEcFBJIIZzSGfgTqc9QCrPSw==",
       "license": "ISC",
       "peerDependencies": {
-        "react": "^16.5.1 || ^17.0.0 || ^18.0.0 || ^19.0.0-rc"
+        "react": "^16.5.1 || ^17.0.0 || ^18.0.0 || ^19.0.0"
       }
     },
     "node_modules/lz-string": {
@@ -8519,6 +8539,53 @@
         "node": ">=8"
       }
     },
+    "node_modules/playwright": {
+      "version": "1.52.0",
+      "resolved": "https://registry.npmjs.org/playwright/-/playwright-1.52.0.tgz",
+      "integrity": "sha512-JAwMNMBlxJ2oD1kce4KPtMkDeKGHQstdpFPcPH3maElAXon/QZeTvtsfXmTMRyO9TslfoYOXkSsvao2nE1ilTw==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "dependencies": {
+        "playwright-core": "1.52.0"
+      },
+      "bin": {
+        "playwright": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      },
+      "optionalDependencies": {
+        "fsevents": "2.3.2"
+      }
+    },
+    "node_modules/playwright-core": {
+      "version": "1.52.0",
+      "resolved": "https://registry.npmjs.org/playwright-core/-/playwright-core-1.52.0.tgz",
+      "integrity": "sha512-l2osTgLXSMeuLZOML9qYODUQoPPnUsKsb5/P6LJ2e6uPKXUdPK5WYhN4z03G+YNbWmGDY4YENauNu4ZKczreHg==",
+      "dev": true,
+      "license": "Apache-2.0",
+      "bin": {
+        "playwright-core": "cli.js"
+      },
+      "engines": {
+        "node": ">=18"
+      }
+    },
+    "node_modules/playwright/node_modules/fsevents": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.2.tgz",
+      "integrity": "sha512-xiqMQR4xAeHTuB9uWm+fFRcIOgKBMiOBP+eXiyT7jsgVCq1bkVygt00oASowB7EdtpOHaaPgKt812P9ab+DDKA==",
+      "dev": true,
+      "hasInstallScript": true,
+      "license": "MIT",
+      "optional": true,
+      "os": [
+        "darwin"
+      ],
+      "engines": {
+        "node": "^8.16.0 || ^10.6.0 || >=11.0.0"
+      }
+    },
     "node_modules/postcss": {
       "version": "8.5.3",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.5.3.tgz",
@@ -10920,10 +10987,10 @@
     },
     "server": {
       "name": "@modelcontextprotocol/inspector-server",
-      "version": "0.14.2",
+      "version": "0.15.0",
       "license": "MIT",
       "dependencies": {
-        "@modelcontextprotocol/sdk": "^1.12.1",
+        "@modelcontextprotocol/sdk": "^1.13.1",
         "cors": "^2.8.5",
         "express": "^5.1.0",
         "ws": "^8.18.0",
diff --git a/package.json b/package.json
index 061ddf1a..5d5fe52f 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@modelcontextprotocol/inspector",
-  "version": "0.14.2",
+  "version": "0.15.0",
   "description": "Model Context Protocol inspector",
   "license": "MIT",
   "author": "Anthropic, PBC (https://anthropic.com)",
@@ -27,13 +27,14 @@
     "build-client": "cd client && npm run build",
     "build-cli": "cd cli && npm run build",
     "clean": "rimraf ./node_modules ./client/node_modules ./cli/node_modules ./build ./client/dist ./server/build ./cli/build ./package-lock.json && npm install",
-    "dev": "concurrently \"cd client && npm run dev\" \"cd server && npm run dev\"",
-    "dev:windows": "concurrently \"cd client && npm run dev\" \"cd server && npm run dev:windows\"",
+    "dev": "node client/bin/start.js --dev",
+    "dev:windows": "node client/bin/start.js --dev",
     "start": "node client/bin/start.js",
     "start-server": "cd server && npm run start",
     "start-client": "cd client && npm run preview",
     "test": "npm run prettier-check && cd client && npm test",
     "test-cli": "cd cli && npm run test",
+    "test:e2e": "MCP_AUTO_OPEN_ENABLED=false npm run test:e2e --workspace=client",
     "prettier-fix": "prettier --write .",
     "prettier-check": "prettier --check .",
     "lint": "prettier --check . && cd client && npm run lint",
@@ -43,10 +44,10 @@
     "check-version": "node scripts/check-version-consistency.js"
   },
   "dependencies": {
-    "@modelcontextprotocol/inspector-cli": "^0.14.2",
-    "@modelcontextprotocol/inspector-client": "^0.14.2",
-    "@modelcontextprotocol/inspector-server": "^0.14.2",
-    "@modelcontextprotocol/sdk": "^1.12.1",
+    "@modelcontextprotocol/inspector-cli": "^0.15.0",
+    "@modelcontextprotocol/inspector-client": "^0.15.0",
+    "@modelcontextprotocol/inspector-server": "^0.15.0",
+    "@modelcontextprotocol/sdk": "^1.13.1",
     "concurrently": "^9.0.1",
     "open": "^10.1.0",
     "shell-quote": "^1.8.2",
@@ -55,6 +56,7 @@
     "zod": "^3.23.8"
   },
   "devDependencies": {
+    "@playwright/test": "^1.52.0",
     "@types/jest": "^29.5.14",
     "@types/node": "^22.7.5",
     "@types/shell-quote": "^1.7.5",
@@ -62,5 +64,8 @@
     "prettier": "3.3.3",
     "rimraf": "^6.0.1",
     "typescript": "^5.4.2"
+  },
+  "engines": {
+    "node": ">=22.7.5"
   }
 }
diff --git a/scripts/README.md b/scripts/README.md
new file mode 100644
index 00000000..d6887faf
--- /dev/null
+++ b/scripts/README.md
@@ -0,0 +1,72 @@
+# Version Management Scripts
+
+This directory contains scripts for managing version consistency across the monorepo.
+
+## Scripts
+
+### update-version.js
+
+Updates the version across all package.json files in the monorepo and updates package-lock.json.
+
+**Usage:**
+
+```bash
+npm run update-version <new-version>
+# Example:
+npm run update-version 0.14.3
+```
+
+This script will:
+
+1. Update the version in all package.json files (root, client, server, cli)
+2. Update workspace dependencies in the root package.json
+3. Run `npm install` to update package-lock.json
+4. Provide next steps for committing and tagging
+
+### check-version-consistency.js
+
+Checks that all packages have consistent versions and that package-lock.json is up to date.
+
+**Usage:**
+
+```bash
+npm run check-version
+```
+
+This script checks:
+
+1. All package.json files have the same version
+2. Workspace dependencies in root package.json match the current version
+3. package-lock.json version matches package.json
+4. Workspace packages in package-lock.json have the correct versions
+
+This check runs automatically in CI on every PR and push to main.
+
+## CI Integration
+
+The version consistency check is integrated into the GitHub Actions workflow (`.github/workflows/main.yml`) and will fail the build if:
+
+- Package versions are inconsistent
+- package-lock.json is out of sync
+
+## Common Workflows
+
+### Bumping version for a release:
+
+```bash
+# Update to new version
+npm run update-version 0.15.0
+
+# Verify everything is correct
+npm run check-version
+
+# Commit the changes
+git add -A
+git commit -m "chore: bump version to 0.15.0"
+
+# Create a tag
+git tag 0.15.0
+
+# Push changes and tag
+git push && git push --tags
+```
diff --git a/scripts/check-version-consistency.js b/scripts/check-version-consistency.js
new file mode 100755
index 00000000..379931de
--- /dev/null
+++ b/scripts/check-version-consistency.js
@@ -0,0 +1,177 @@
+#!/usr/bin/env node
+
+import fs from "fs";
+import path from "path";
+import { fileURLToPath } from "url";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+/**
+ * Checks version consistency across all package.json files in the monorepo
+ * Exits with code 1 if versions are inconsistent
+ * Usage: node scripts/check-version-consistency.js
+ */
+
+console.log("🔍 Checking version consistency across packages...\n");
+
+// List of package.json files to check
+const packagePaths = [
+  "package.json",
+  "client/package.json",
+  "server/package.json",
+  "cli/package.json",
+];
+
+const versions = new Map();
+const errors = [];
+
+// Read version from each package.json
+packagePaths.forEach((packagePath) => {
+  const fullPath = path.join(__dirname, "..", packagePath);
+
+  if (!fs.existsSync(fullPath)) {
+    console.warn(`⚠️  Skipping ${packagePath} - file not found`);
+    return;
+  }
+
+  try {
+    const packageJson = JSON.parse(fs.readFileSync(fullPath, "utf8"));
+    const version = packageJson.version;
+    const packageName = packageJson.name || packagePath;
+
+    versions.set(packagePath, {
+      name: packageName,
+      version: version,
+      dependencies: packageJson.dependencies || {},
+    });
+
+    console.log(`📦 ${packagePath}:`);
+    console.log(`   Name: ${packageName}`);
+    console.log(`   Version: ${version}`);
+  } catch (error) {
+    errors.push(`Failed to read ${packagePath}: ${error.message}`);
+  }
+});
+
+if (errors.length > 0) {
+  console.error("\n❌ Errors occurred while reading package files:");
+  errors.forEach((error) => console.error(`   - ${error}`));
+  process.exit(1);
+}
+
+// Check if all versions match
+const allVersions = Array.from(versions.values()).map((v) => v.version);
+const uniqueVersions = [...new Set(allVersions)];
+
+console.log("\n📊 Version Summary:");
+console.log(`   Total packages: ${versions.size}`);
+console.log(`   Unique versions: ${uniqueVersions.length}`);
+
+if (uniqueVersions.length > 1) {
+  console.error("\n❌ Version mismatch detected!");
+  console.error("   Found versions: " + uniqueVersions.join(", "));
+
+  console.error("\n   Package versions:");
+  versions.forEach((info, path) => {
+    console.error(`   - ${path}: ${info.version}`);
+  });
+} else {
+  console.log(`   ✅ All packages are at version: ${uniqueVersions[0]}`);
+}
+
+// Check workspace dependencies in root package.json
+const rootPackage = versions.get("package.json");
+if (rootPackage) {
+  console.log("\n🔗 Checking workspace dependencies...");
+  const expectedVersion = rootPackage.version;
+  let dependencyErrors = false;
+
+  Object.entries(rootPackage.dependencies).forEach(([dep, version]) => {
+    if (dep.startsWith("@modelcontextprotocol/inspector-")) {
+      const expectedDepVersion = `^${expectedVersion}`;
+      if (version !== expectedDepVersion) {
+        console.error(
+          `   ❌ ${dep}: ${version} (expected ${expectedDepVersion})`,
+        );
+        dependencyErrors = true;
+      } else {
+        console.log(`   ✅ ${dep}: ${version}`);
+      }
+    }
+  });
+
+  if (dependencyErrors) {
+    errors.push("Workspace dependency versions do not match package versions");
+  }
+}
+
+// Check if package-lock.json is up to date
+console.log("\n🔒 Checking package-lock.json...");
+const lockPath = path.join(__dirname, "..", "package-lock.json");
+let lockFileError = false;
+
+if (!fs.existsSync(lockPath)) {
+  console.error("   ❌ package-lock.json not found");
+  lockFileError = true;
+} else {
+  try {
+    const lockFile = JSON.parse(fs.readFileSync(lockPath, "utf8"));
+    const lockVersion = lockFile.version;
+    const expectedVersion = rootPackage?.version || uniqueVersions[0];
+
+    if (lockVersion !== expectedVersion) {
+      console.error(
+        `   ❌ package-lock.json version (${lockVersion}) does not match package.json version (${expectedVersion})`,
+      );
+      lockFileError = true;
+    } else {
+      console.log(`   ✅ package-lock.json version matches: ${lockVersion}`);
+    }
+
+    // Check workspace package versions in lock file
+    if (lockFile.packages) {
+      const workspacePackages = [
+        { path: "client", name: "@modelcontextprotocol/inspector-client" },
+        { path: "server", name: "@modelcontextprotocol/inspector-server" },
+        { path: "cli", name: "@modelcontextprotocol/inspector-cli" },
+      ];
+
+      workspacePackages.forEach(({ path, name }) => {
+        const lockPkgPath = lockFile.packages[path];
+        if (lockPkgPath && lockPkgPath.version !== expectedVersion) {
+          console.error(
+            `   ❌ ${name} in lock file: ${lockPkgPath.version} (expected ${expectedVersion})`,
+          );
+          lockFileError = true;
+        }
+      });
+    }
+  } catch (error) {
+    console.error(`   ❌ Failed to parse package-lock.json: ${error.message}`);
+    lockFileError = true;
+  }
+}
+
+// Final result
+console.log("\n🎯 Result:");
+if (uniqueVersions.length === 1 && errors.length === 0 && !lockFileError) {
+  console.log("   ✅ Version consistency check passed!");
+  process.exit(0);
+} else {
+  console.error("   ❌ Version consistency check failed!");
+  if (uniqueVersions.length > 1) {
+    console.error("   - Package versions are not consistent");
+  }
+  if (errors.length > 0) {
+    console.error("   - " + errors.join("\n   - "));
+  }
+  if (lockFileError) {
+    console.error("   - package-lock.json is out of sync");
+  }
+  console.error(
+    '\n💡 Run "npm run update-version <new-version>" to fix version inconsistencies',
+  );
+  console.error('   or run "npm install" to update package-lock.json');
+  process.exit(1);
+}
diff --git a/scripts/update-version.js b/scripts/update-version.js
new file mode 100755
index 00000000..91b69f3b
--- /dev/null
+++ b/scripts/update-version.js
@@ -0,0 +1,104 @@
+#!/usr/bin/env node
+
+import fs from "fs";
+import path from "path";
+import { execSync } from "child_process";
+import { fileURLToPath } from "url";
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+
+/**
+ * Updates version across all package.json files in the monorepo
+ * Usage: node scripts/update-version.js <new-version>
+ * Example: node scripts/update-version.js 0.14.2
+ */
+
+const newVersion = process.argv[2];
+
+if (!newVersion) {
+  console.error("❌ Please provide a version number");
+  console.error("Usage: node scripts/update-version.js <new-version>");
+  console.error("Example: node scripts/update-version.js 0.14.2");
+  process.exit(1);
+}
+
+// Validate version format
+const versionRegex = /^\d+\.\d+\.\d+(-[\w.]+)?$/;
+if (!versionRegex.test(newVersion)) {
+  console.error(
+    "❌ Invalid version format. Please use semantic versioning (e.g., 1.2.3 or 1.2.3-beta.1)",
+  );
+  process.exit(1);
+}
+
+console.log(`🔄 Updating all packages to version ${newVersion}...`);
+
+// List of package.json files to update
+const packagePaths = [
+  "package.json",
+  "client/package.json",
+  "server/package.json",
+  "cli/package.json",
+];
+
+const updatedFiles = [];
+
+// Update version in each package.json
+packagePaths.forEach((packagePath) => {
+  const fullPath = path.join(__dirname, "..", packagePath);
+
+  if (!fs.existsSync(fullPath)) {
+    console.warn(`⚠️  Skipping ${packagePath} - file not found`);
+    return;
+  }
+
+  try {
+    const packageJson = JSON.parse(fs.readFileSync(fullPath, "utf8"));
+    const oldVersion = packageJson.version;
+    packageJson.version = newVersion;
+
+    // Update workspace dependencies in root package.json
+    if (packagePath === "package.json" && packageJson.dependencies) {
+      Object.keys(packageJson.dependencies).forEach((dep) => {
+        if (dep.startsWith("@modelcontextprotocol/inspector-")) {
+          packageJson.dependencies[dep] = `^${newVersion}`;
+        }
+      });
+    }
+
+    fs.writeFileSync(fullPath, JSON.stringify(packageJson, null, 2) + "\n");
+    updatedFiles.push(packagePath);
+    console.log(
+      `✅ Updated ${packagePath} from ${oldVersion} to ${newVersion}`,
+    );
+  } catch (error) {
+    console.error(`❌ Failed to update ${packagePath}:`, error.message);
+    process.exit(1);
+  }
+});
+
+console.log("\n📝 Summary:");
+console.log(`Updated ${updatedFiles.length} files to version ${newVersion}`);
+
+// Update package-lock.json
+console.log("\n🔒 Updating package-lock.json...");
+try {
+  execSync("npm install", { stdio: "inherit" });
+  console.log("✅ package-lock.json updated successfully");
+} catch (error) {
+  console.error("❌ Failed to update package-lock.json:", error.message);
+  console.error('Please run "npm install" manually');
+  process.exit(1);
+}
+
+console.log("\n✨ Version update complete!");
+console.log("\nNext steps:");
+console.log("1. Review the changes: git diff");
+console.log(
+  '2. Commit the changes: git add -A && git commit -m "chore: bump version to ' +
+    newVersion +
+    '"',
+);
+console.log("3. Create a git tag: git tag v" + newVersion);
+console.log("4. Push changes and tag: git push && git push --tags");
diff --git a/server/package.json b/server/package.json
index 9417243d..b43fc289 100644
--- a/server/package.json
+++ b/server/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@modelcontextprotocol/inspector-server",
-  "version": "0.14.2",
+  "version": "0.15.0",
   "description": "Server-side application for the Model Context Protocol inspector",
   "license": "MIT",
   "author": "Anthropic, PBC (https://anthropic.com)",
@@ -27,7 +27,7 @@
     "typescript": "^5.6.2"
   },
   "dependencies": {
-    "@modelcontextprotocol/sdk": "^1.12.1",
+    "@modelcontextprotocol/sdk": "^1.13.1",
     "cors": "^2.8.5",
     "express": "^5.1.0",
     "ws": "^8.18.0",
diff --git a/server/src/index.ts b/server/src/index.ts
index 67bac919..971cf158 100644
--- a/server/src/index.ts
+++ b/server/src/index.ts
@@ -21,6 +21,7 @@ import { findActualExecutable } from "spawn-rx";
 import mcpProxy from "./mcpProxy.js";
 import { randomUUID, randomBytes, timingSafeEqual } from "node:crypto";
 
+const DEFAULT_MCP_PROXY_LISTEN_PORT = "6277";
 const SSE_HEADERS_PASSTHROUGH = ["authorization"];
 const STREAMABLE_HTTP_HEADERS_PASSTHROUGH = [
   "authorization",
@@ -89,7 +90,9 @@ app.use((req, res, next) => {
 const webAppTransports: Map<string, Transport> = new Map<string, Transport>(); // Web app transports by web app sessionId
 const serverTransports: Map<string, Transport> = new Map<string, Transport>(); // Server Transports by web app sessionId
 
-const sessionToken = process.env.MCP_PROXY_AUTH_TOKEN || randomBytes(32).toString("hex");
+// Use provided token from environment or generate a new one
+const sessionToken =
+  process.env.MCP_PROXY_TOKEN || randomBytes(32).toString("hex");
 const authDisabled = !!process.env.DANGEROUSLY_OMIT_AUTH;
 
 // Origin validation middleware to prevent DNS rebinding attacks
@@ -102,12 +105,10 @@ const originValidationMiddleware = (
 
   // Default origins based on CLIENT_PORT or use environment variable
   const clientPort = process.env.CLIENT_PORT || "6274";
-  const defaultOrigins = [
-    `http://localhost:${clientPort}`,
-    `http://127.0.0.1:${clientPort}`,
+  const defaultOrigin = `http://localhost:${clientPort}`;
+  const allowedOrigins = process.env.ALLOWED_ORIGINS?.split(",") || [
+    defaultOrigin,
   ];
-  const allowedOrigins =
-    process.env.ALLOWED_ORIGINS?.split(",") || defaultOrigins;
 
   if (origin && !allowedOrigins.includes(origin)) {
     console.error(`Invalid origin: ${origin}`);
@@ -528,23 +529,19 @@ app.get("/config", originValidationMiddleware, authMiddleware, (req, res) => {
   }
 });
 
-const PORT = parseInt(process.env.PORT || "6277", 10);
-const HOST = process.env.HOST || "127.0.0.1";
+const PORT = parseInt(
+  process.env.SERVER_PORT || DEFAULT_MCP_PROXY_LISTEN_PORT,
+  10,
+);
+const HOST = process.env.HOST || "localhost";
 
 const server = app.listen(PORT, HOST);
 server.on("listening", () => {
   console.log(`⚙️ Proxy server listening on ${HOST}:${PORT}`);
   if (!authDisabled) {
-    console.log(`🔑 Session token: ${sessionToken}`);
     console.log(
-      `Use this token to authenticate requests or set DANGEROUSLY_OMIT_AUTH=true to disable auth`,
-    );
-
-    // Display clickable URL with pre-filled token
-    const clientPort = process.env.CLIENT_PORT || "6274";
-    const clientUrl = `http://localhost:${clientPort}/?MCP_PROXY_AUTH_TOKEN=${sessionToken}`;
-    console.log(
-      `\n🔗 Open inspector with token pre-filled:\n   ${clientUrl}\n   (Auto-open is disabled when authentication is enabled)\n`,
+      `🔑 Session token: ${sessionToken}\n   ` +
+        `Use this token to authenticate requests or set DANGEROUSLY_OMIT_AUTH=true to disable auth`,
     );
   } else {
     console.log(
diff --git a/server/src/mcpProxy.ts b/server/src/mcpProxy.ts
index 9dee9de4..664f1711 100644
--- a/server/src/mcpProxy.ts
+++ b/server/src/mcpProxy.ts
@@ -6,12 +6,10 @@ function onClientError(error: Error) {
 }
 
 function onServerError(error: Error) {
-  if (
-    (error?.message &&
-      error.message.includes("Error POSTing to endpoint (HTTP 404)")) ||
-    (error?.cause && JSON.stringify(error.cause).includes("ECONNREFUSED"))
-  ) {
+  if (error?.cause && JSON.stringify(error.cause).includes("ECONNREFUSED")) {
     console.error("Connection refused. Is the MCP server running?");
+  } else if (error.message && error.message.includes("404")) {
+    console.error("Error accessing endpoint (HTTP 404)");
   } else {
     console.error("Error from MCP server:", error);
   }