Claude Code实战教程(7)：连接外部世界——MCP协议与第三方工具集成

# 确保已安装 GitHub CLI
brew install gh
gh auth login

claude mcp add github \
  --transport sse \
  https://mcp.github.com/mcp \
  --header "Authorization: Bearer $GITHUB_TOKEN"

/mcp

列出我最近的 PR

创建一个 Issue，标题是"登录页面有 bug"，描述包含复现步骤

npx @modelcontextprotocol/server-playwright

在 Chrome 中打开 https://example.com 并截图

在 https://github.com 搜索 "claude code"，列出前 5 个结果

# 用户级（所有项目可用）
~/.claude.json

# 项目级（仅当前项目）
.claude.json

{
  "mcpServers": {
    "github": {
      "command": "npx",
      "args": ["@modelcontextprotocol/server-github"],
      "env": {
        "GITHUB_TOKEN": "$GITHUB_TOKEN"
      }
    }
  }
}

# 添加 MCP Server
claude mcp add <name> [options]

# 列出已安装的 MCP Server
claude mcp list

# 删除 MCP Server
claude mcp rm <name>

/mcp__github__list_prs

/mcp__github__get_issue 123

import { Server } from "@modelcontextprotocol/sdk/server/index.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";
import { CallToolRequestSchema, ListToolsRequestSchema } from "@modelcontextprotocol/sdk/types.js";

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

// 定义工具
server.setRequestHandler(ListToolsRequestSchema, async () => {
  return {
    tools: [
      {
        name: "get_weather",
        description: "获取指定城市的天气",
        inputSchema: {
          type: "object",
          properties: {
            city: { type: "string", description: "城市名称" }
          },
          required: ["city"]
        }
      }
    ]
  };
});

// 实现工具
server.setRequestHandler(CallToolRequestSchema, async (request) => {
  if (request.params.name === "get_weather") {
    const { city } = request.params.arguments;
    const weather = await fetchWeather(city);
    return {
      content: [{ type: "text", text: JSON.stringify(weather) }]
    };
  }
  throw new Error(`Unknown tool: ${request.params.name}`);
});

async function fetchWeather(city) {
  return { city, temperature: 25, condition: "sunny" };
}

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

# 发布到 npm
npm publish

# 或在 GitHub 上分享
# 其他人可以通过 npx 安装使用

claude mcp add postgres \
  --transport stdio \
  npx \
  @modelcontextprotocol/server-postgres \
  postgresql://user:password@localhost:5432/mydb

查询 users 表中有多少条记录

找出最近 7 天注册的用户

帮我分析订单数据，找出销售最好的产品