TypeScript SDK 使用说明

安装指南

要安装 MCP TypeScript SDK，请按照以下步骤操作：

通过 npm 安装

npm install @modelcontextprotocol/typescript-sdk

其他平台

如需在其他平台（如 Yarn、pnpm 等）安装，请参考对应的包管理工具文档。

快速上手

以下是一个简单的示例，展示如何使用 SDK：

示例：基本用法

import { Server } from "@modelcontextprotocol/typescript-sdk";
import { StdioServerTransport } from "@modelcontextprotocol/typescript-sdk";

const server = new Server({
  name: "example-server",
  version: "1.0.0"
});

server.setRequestHandler("ping", () => {
  return {
    status: "pong"
  };
});

const transport = new StdioServerTransport();
await server.connect(transport);

示例：完整实现

以下是一个完整的 MCP 服务器实现示例：

import { Server } from "@modelcontextprotocol/typescript-sdk";
import { StdioServerTransport } from "@modelcontextprotocol/typescript-sdk";

const server = new Server({
  name: "example-server",
  version: "1.0.0"
});

server.setRequestHandler("ping", () => {
  return {
    status: "pong"
  };
});

server.setRequestHandler("echo", ({ body }) => {
  return {
    echo: body.text
  };
});

const transport = new StdioServerTransport();
await server.connect(transport);

示例代码

基础示例

以下是一个简单的 MCP 服务器实现：

import { Server } from "@modelcontextprotocol/typescript-sdk";
import { StdioServerTransport } from "@modelcontextprotocol/typescript-sdk";

const server = new Server({
  name: "example-server",
  version: "1.0.0"
});

server.setRequestHandler("ping", () => {
  return {
    status: "pong"
  };
});

const transport = new StdioServerTransport();
await server.connect(transport);

复杂示例

以下是一个更复杂的 MCP 服务器实现，展示数据库集成：

import { Server } from "@modelcontextprotocol/typescript-sdk";
import sqlite3 from "sqlite3";
import { promisify } from "util";
import { z } from "zod";

const server = new Server({
  name: "SQLite Explorer",
  version: "1.0.0"
});

const getDb = () => {
  const db = new sqlite3.Database("database.db");
  return {
    all: promisify(db.all.bind(db)),
    close: promisify(db.close.bind(db))
  };
};

server.setRequestHandler("schema", async () => {
  const db = getDb();
  try {
    const tables = await db.all(
      "SELECT sql FROM sqlite_master WHERE type='table'"
    );
    return {
      contents: [{
        uri: "schema://main",
        text: tables.map((t: {sql: string}) => t.sql).join("\n")
      }]
    };
  } finally {
    await db.close();
  }
});

server.setRequestHandler("query", async ({ body }) => {
  const sql = body.text;
  const db = getDb();
  try {
    const results = await db.all(sql);
    return {
      content: [{
        type: "text",
        text: JSON.stringify(results, null, 2)
      }]
    };
  } catch (err: unknown) {
    const error = err as Error;
    return {
      content: [{
        type: "text",
        text: `Error: ${error.message}`
      }],
      status: "error"
    };
  } finally {
    await db.close();
  }
});

const transport = new StdioServerTransport();
await server.connect(transport);

高级用法

低层次实现

以下是一个底层实现的示例：

import { Server } from "@modelcontextprotocol/typescript-sdk";
import { RawServerTransport } from "@modelcontextprotocol/typescript-sdk";

const server = new Server({
  name: "example-server",
  version: "1.0.0"
});

server.setRequestHandler("ping", () => {
  return {
    status: "pong"
  };
});

const transport = new RawServerTransport();
await server.connect(transport);

TypeScript 类型定义

以下是一个自定义类型定义的示例：

import { Server } from "@modelcontextprotocol/typescript-sdk";
import { z } from "zod";

type User = {
  id: string;
  name: string;
  email: string;
};

const userSchema = z.object({
  id: z.string().min(1),
  name: z.string().min(1),
  email: z.string().email()
});

const server = new Server({
  name: "example-server",
  version: "1.0.0"
});

server.setRequestHandler("user", async ({ body }) => {
  const user = await body.validate(userSchema);
  return {
    user
  };
});

完整代码示例

以下是一个完整的 MCP 服务器实现：

import { Server } from "@modelcontextprotocol/typescript-sdk";
import { StdioServerTransport } from "@modelcontextprotocol/typescript-sdk";

const server = new Server({
  name: "example-server",
  version: "1.0.0"
});

server.setRequestHandler("ping", () => {
  return {
    status: "pong"
  };
});

server.setRequestHandler("echo", ({ body }) => {
  return {
    echo: body.text
  };
});

const transport = new StdioServerTransport();
await server.connect(transport);

参考文档

如需了解更多信息，请参考以下链接：

• 官方文档
• GitHub 仓库

许可证

本项目遵循 MIT 许可证，具体内容如下：

MIT License

Copyright (c) 2023 Example Corporation

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.