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Express MCP 服务器

使用 Express 和 TypeScript 构建的无状态模型上下文协议 (MCP) 服务器。

特征

  • 采用现代 Streamable HTTP 传输的无状态 MCP 服务器实现

  • TypeScript 类型安全

  • 用于 HTTP 处理的 Express.js

Related MCP server: OpenAPI MCP Server

要求

  • Node.js 18+

  • npm 或 yarn

安装

# Clone the repository (or download) git clone https://github.com/your-username/sample-express-mcp-server.git cd sample-express-mcp-server # Install dependencies npm install

发展

# Build the TypeScript code npm run build # Run in development mode with auto-reloading npm run dev # Run tests (when added) npm test

服务器结构

src/ ├── index.ts # Main application entry point └── server.ts # MCP server definition with resource, tool, and prompt

可用功能

该服务器通过三个 MCP 组件实现了一个简单的回显端点:

  • 资源echo://{message} - 将消息作为资源返回

  • 工具echo ——将提供的消息作为工具响应回显

  • 提示echo - 使用提供的消息创建用户提示

MCP 协议

该服务器实现了模型上下文协议(MCP),这是 LLM 与外部数据和功能交互的标准化方式。它公开了一个响应 JSON-RPC 请求的无状态 API 端点。

API 使用

/mcp发送一个带有 JSON-RPC 负载的 POST 请求:

初始化

curl -X POST http://localhost:3001/mcp \ -H "Content-Type: application/json" \ -H "Accept: application/json" \ -H "Accept: text/event-stream" \ -d '{ "jsonrpc": "2.0", "id": 1, "method": "initialize", "params": { "protocolVersion": "2024-11-05", "capabilities": { "roots": { "listChanged": true }, "sampling": {} }, "clientInfo": { "name": "ExampleClient", "version": "1.0.0" } } }'

呼叫回显工具

curl -X POST http://localhost:3001/mcp \ -H "Content-Type: application/json" \ -H "Accept: application/json" \ -H "Accept: text/event-stream" \ -d '{ "jsonrpc": "2.0", "method": "tools/call", "params": { "name": "echo", "arguments": { "message": "Hello, World!" } }, "id": 1 }'

执照

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