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Migrate to MCP SDK 2.0 with official Protocol and isolated role peers (#720)

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App and AppBridge extend the public Protocol from @modelcontextprotocol/client; the iframe wire protocol (ui/initialize only) is unchanged. Peers move to the split SDK 2.0 packages with client and server as optional role peers. Fixups (lockfile, peer ranges, restored handler guards, docs, wire-compat tests) follow in a separate PR.

Co-authored-by: Andrew Khadder <andrew@manufact.com>
Co-authored-by: Felix Weinberger <fweinberger@anthropic.com>
Closes #702
This commit is contained in:
Olivier Chafik 2026-09-08 12:44:49 +01:00 • committed by GitHub
commit 1a713173cc
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3 changed files with 2415 additions and 1867 deletions
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10
examples/quickstart/main.ts
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@ -1,7 +1,7 @@
import { createMcpExpressApp } from "@modelcontextprotocol/sdk/server/express.js";
import type { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import { StreamableHTTPServerTransport } from "@modelcontextprotocol/sdk/server/streamableHttp.js";
import { createMcpExpressApp } from "@modelcontextprotocol/express";
import { NodeStreamableHTTPServerTransport } from "@modelcontextprotocol/node";
import type { McpServer } from "@modelcontextprotocol/server";
import { StdioServerTransport } from "@modelcontextprotocol/server/stdio";
import cors from "cors";
import type { Request, Response } from "express";
import { createServer } from "./server.js";
@ -21,7 +21,7 @@ export async function startStreamableHTTPServer(
app.all("/mcp", async (req: Request, res: Response) => {
const server = createServer();
const transport = new StreamableHTTPServerTransport({
const transport = new NodeStreamableHTTPServerTransport({
sessionIdGenerator: undefined,
});

7
examples/quickstart/package.json
View file

@ -16,9 +16,12 @@
},
"dependencies": {
"@modelcontextprotocol/ext-apps": "^1.7.0",
"@modelcontextprotocol/sdk": "^1.29.0",
"@modelcontextprotocol/express": "2.0.0",
"@modelcontextprotocol/node": "2.0.0",
"@modelcontextprotocol/server": "2.0.0",
"cors": "^2.8.5",
"express": "^5.1.0"
"express": "^5.1.0",
"zod": "^4.1.13"
},
"devDependencies": {
"@types/cors": "^2.8.19",

5
examples/quickstart/server.ts
View file

@ -3,9 +3,10 @@ import {
registerAppTool,
RESOURCE_MIME_TYPE,
} from "@modelcontextprotocol/ext-apps/server";
import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { McpServer } from "@modelcontextprotocol/server";
import fs from "node:fs/promises";
import path from "node:path";
import { z } from "zod";
const DIST_DIR = path.join(import.meta.dirname, "dist");
@ -30,7 +31,7 @@ export function createServer(): McpServer {
{
title: "Get Time",
description: "Returns the current server time.",
inputSchema: {},
inputSchema: z.object({}),
_meta: { ui: { resourceUri } }, // Links this tool to its UI resource
},
async () => {