diff --git a/mcp-client-python/README.md b/mcp-client-python/README.md index 53467ba..dc6cda0 100644 --- a/mcp-client-python/README.md +++ b/mcp-client-python/README.md @@ -1,3 +1,3 @@ -# An LLM-Powered Chatbot MCP Client +# An LLM-Powered Chatbot MCP Client written in Python See the [Building MCP clients](https://modelcontextprotocol.io/tutorials/building-a-client) tutorial for more information. diff --git a/mcp-client-typescript/.env.example b/mcp-client-typescript/.env.example new file mode 100644 index 0000000..80a79e6 --- /dev/null +++ b/mcp-client-typescript/.env.example @@ -0,0 +1 @@ +ANTHROPIC_API_KEY= \ No newline at end of file diff --git a/mcp-client-typescript/.gitignore b/mcp-client-typescript/.gitignore new file mode 100644 index 0000000..ef064b7 --- /dev/null +++ b/mcp-client-typescript/.gitignore @@ -0,0 +1,3 @@ +/build +/node_modules +.env diff --git a/mcp-client-typescript/README.md b/mcp-client-typescript/README.md new file mode 100644 index 0000000..8a66bf5 --- /dev/null +++ b/mcp-client-typescript/README.md @@ -0,0 +1,3 @@ +# An LLM-Powered Chatbot MCP Client written in TypeScript + +See the [Building MCP clients](https://modelcontextprotocol.io/tutorials/building-a-client) tutorial for more information. diff --git a/mcp-client-typescript/index.ts b/mcp-client-typescript/index.ts new file mode 100644 index 0000000..5a357db --- /dev/null +++ b/mcp-client-typescript/index.ts @@ -0,0 +1,167 @@ +import { Anthropic } from "@anthropic-ai/sdk"; +import { + MessageParam, + Tool, +} from "@anthropic-ai/sdk/resources/messages/messages.mjs"; + +import { Client } from "@modelcontextprotocol/sdk/client/index.js"; +import { StdioClientTransport } from "@modelcontextprotocol/sdk/client/stdio.js"; +import readline from "readline/promises"; + +import dotenv from "dotenv"; + +dotenv.config(); + +const ANTHROPIC_API_KEY = process.env.ANTHROPIC_API_KEY; +if (!ANTHROPIC_API_KEY) { + throw new Error("ANTHROPIC_API_KEY is not set"); +} + +class MCPClient { + private mcp: Client; + private anthropic: Anthropic; + private transport: StdioClientTransport | null = null; + + constructor() { + this.anthropic = new Anthropic({ + apiKey: ANTHROPIC_API_KEY, + }); + this.mcp = new Client({ name: "mcp-client-cli", version: "1.0.0" }); + } + + async connectToServer(serverScriptPath: string) { + try { + const isJs = serverScriptPath.endsWith(".js"); + const isPy = serverScriptPath.endsWith(".py"); + if (!isJs && !isPy) { + throw new Error("Server script must be a .js or .py file"); + } + const command = isPy + ? process.platform === "win32" + ? "python" + : "python3" + : process.execPath; + this.transport = new StdioClientTransport({ + command, + args: [serverScriptPath], + }); + this.mcp.connect(this.transport); + const toolsResult = await this.mcp.listTools(); + const tools = toolsResult.tools.map((tool) => { + return { + name: tool.name, + description: tool.description, + input_schema: tool.inputSchema, + }; + }); + console.log( + "Connected to server with tools:", + tools.map(({ name }) => name) + ); + } catch (e) { + console.log("Failed to connect to MCP server: ", e); + throw e; + } + } + + async processQuery(query: string) { + const messages: MessageParam[] = [ + { + role: "user", + content: query, + }, + ]; + + const toolsResult = await this.mcp.listTools(); + const tools: Tool[] = toolsResult.tools.map((tool) => { + return { + name: tool.name, + description: tool.description, + input_schema: tool.inputSchema, + }; + }); + const response = await this.anthropic.messages.create({ + model: "claude-3-5-sonnet-20241022", + max_tokens: 1000, + messages, + tools, + }); + + const finalText = []; + const toolResults = []; + + for (const content of response.content) { + if (content.type === "text") { + finalText.push(content.text); + } else if (content.type === "tool_use") { + const toolName = content.name; + const toolArgs = content.input as { [x: string]: unknown } | undefined; + + const result = await this.mcp.callTool({ + name: toolName, + arguments: toolArgs, + }); + toolResults.push(result); + finalText.push( + `[Calling tool ${toolName} with args ${JSON.stringify(toolArgs)}]` + ); + + messages.push({ + role: "user", + content: result.content as string, + }); + + const response = await this.anthropic.messages.create({ + model: "claude-3-5-sonnet-20241022", + max_tokens: 1000, + messages, + }); + + finalText.push( + response.content[0].type === "text" ? response.content[0].text : "" + ); + } + } + + return finalText.join("\n"); + } + + async chatLoop() { + const rl = readline.createInterface({ + input: process.stdin, + output: process.stdout, + }); + + console.log("\nMCP Client Started!"); + console.log("Type your queries or 'quit' to exit."); + + while (true) { + const message = await rl.question("\nQuery: "); + if (message === "quit") { + break; + } + const response = await this.processQuery(message); + console.log("\n" + response); + } + } + + async cleanup() { + await this.mcp.close(); + } +} +async function main() { + if (process.argv.length < 3) { + console.log("Usage: node index.ts "); + return; + } + const mcpClient = new MCPClient(); + try { + await mcpClient.connectToServer(process.argv[2]); + await mcpClient.chatLoop(); + } finally { + await mcpClient.cleanup(); + process.exit(0); + } +} + +main(); diff --git a/mcp-client-typescript/package-lock.json b/mcp-client-typescript/package-lock.json new file mode 100644 index 0000000..f9498fe --- /dev/null +++ b/mcp-client-typescript/package-lock.json @@ -0,0 +1,636 @@ +{ + "name": "mcp-client-cli", + "version": "1.0.0", + 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