MCP Node.js 调试器

MCP 服务器允许 Cursor 或 Claude Code 在运行时访问 Node.js 以帮助您调试： @hyperdrive-eng/mcp-nodejs-debugger 。

演示

光标

https://github.com/user-attachments/assets/c193a17e-b0e6-4c51-82aa-7f3f0de17e1a

克劳德·科德

https://github.com/user-attachments/assets/adb7321b-3a6a-459b-a5c9-df365710d4d8

Related MCP server: Node.js Debugger MCP Server

快速启动

光标

1. 添加到光标（ ~/.cursor/mcp.json ）

   

   + {
   +   "mcpServers": {
   +   "nodejs-debugger": {
   +      "command": "npx",
   +       "args": ["@hyperdrive-eng/mcp-nodejs-debugger"]
   +     }
   +   }
   + }

2. 在调试模式下运行 Node.js 服务器（即使用--inspect flat）

   node --inspect {file.js}

3. 让 Cursor 在运行时调试你的 Node.js 服务器

   

克劳德·科德

1. 添加到克劳德代码

   claude mcp add nodejs-debugger npx @hyperdrive-eng/mcp-nodejs-debugger

2. 启动克劳德代码

   claude
   ╭───────────────────────────────────────────────────────╮
   │ ✻ Welcome to Claude Code research preview!            │
   │                                                       │
   │   /help for help                                      │
   │                                                       │
   │   Found 1 MCP server (use /mcp for status)            │
   ╰───────────────────────────────────────────────────────╯

3. 在调试模式下运行 Node.js 服务器（即使用--inspect flat）

   # In another terminal
   node --inspect {file.js}

4. 使用 Claude Code 在运行时调试你的 Node.js 服务器

   > I'm getting a runtime error in Node.js 
   
     {YOUR_RUNTIME_ERROR}
     
     Please help me debug this error at runtime using the nodejs-debugger mcp.

用法

克劳德·科德

1. 添加到克劳德代码

   claude mcp add nodejs-debugger npx mcp-nodejs-debugger

2. 验证连接

   > /mcp
     ⎿  MCP Server Status
   
        • nodejs-debugger: connected

3. 从克劳德法典中删除

   claude remove nodejs-debugger

光标

1. 添加到光标（ ~/.cursor/mcp.json ）

   + {
   +   "mcpServers": {
   +   "nodejs-debugger": {
   +      "command": "npx",
   +       "args": ["@hyperdrive-eng/mcp-nodejs-debugger"]
   +     }
   +   }
   + }

2. 验证连接：

   

3. 从 Cursor 中删除（ ~/.cursor/mcp.json ）：

   - {
   -   "mcpServers": {
   -   "nodejs-debugger": {
   -      "command": "npx",
   -       "args": ["@hyperdrive-eng/mcp-nodejs-debugger"]
   -     }
   -   }
   - }

例子

光标

1. 运行这个简单的 Node.js 应用程序： github.com/mdn/express-locallibrary-tutorial ：

   node --inspect ./bin/www

2. 要求 Cursor 设置断点

   

   

3. 在localhost:3000/catalog/book/create创建一本书

   

4. Watch Cursor 捕获运行时状态

   

克劳德·科德

1. 这是一个有缺陷的 Node.js 服务器：

   node --inspect index.js
   
   Debugger listening on ws://127.0.0.1:9229/2862f5a2-8618-4516-8429-1248b397e9b4
   
   #######################
   ## THE RUNTIME ERROR ##
   #######################
   MongooseServerSelectionError: Could not connect to any servers in your MongoDB Atlas cluster. One common reason is that you're trying to access the database from an IP that isn't whitelisted. Make sure your current IP address is on your Atlas cluster's IP whitelist: https://www.mongodb.com/docs/atlas/security-whitelist/
       at _handleConnectionErrors (/Users/arthur/Documents/thirdparties/mdn/express-locallibrary-tutorial/node_modules/mongoose/lib/connection.js:1110:11)
       at NativeConnection.openUri (/Users/arthur/Documents/thirdparties/mdn/express-locallibrary-tutorial/node_modules/mongoose/lib/connection.js:1041:11)
       at async main (/Users/arthur/Documents/thirdparties/mdn/express-locallibrary-tutorial/app.js:35:3) {
     reason: TopologyDescription {
       type: 'ReplicaSetNoPrimary',
       servers: Map(3) {
         'ac-8e6hgk7-shard-00-01.cojoign.mongodb.net:27017' => [ServerDescription],
         'ac-8e6hgk7-shard-00-02.cojoign.mongodb.net:27017' => [ServerDescription],
         'ac-8e6hgk7-shard-00-00.cojoign.mongodb.net:27017' => [ServerDescription]
       },
       stale: false,
       compatible: true,
       heartbeatFrequencyMS: 10000,
       localThresholdMS: 15,
       setName: 'atlas-5syy8t-shard-0',
       maxElectionId: null,
       maxSetVersion: null,
       commonWireVersion: 0,
       logicalSessionTimeoutMinutes: null
     },
     code: undefined
   }

2. Claude Code 在运行时调试 Node.js 服务器：

   > I'm getting a runtime error connecting to mongoose. Please help me debug by checking the value of 
     the mongodb configs at runtime using the nodejs-debugger mcp.
   
     ⏺ I'll help you debug the mongoose connection issue using the Node.js debugger. Let's first understand where the
     MongoDB connection is configured.
   
     ⏺ Search(pattern: "**/*.js")…
       ⎿  Found 100 files
   
     ⏺ Let's set a breakpoint at the mongoose connection point and continue:
   
     ⏺ nodejs-debugger:set_breakpoint (MCP)(file:                                                                         …
           "/Users/arthur/Documents/thirdparties/mdn/express-locallibrary-tutorial/app.js",
            line: 35)
       ⎿  Breakpoint set successfully. ID:
          2:34:0:file:///Users/arthur/Documents/thirdparties/mdn/express-locallibrary-tutorial/app\.js
     
     ⏺ Let's list all our breakpoints:
     
     ⏺ nodejs-debugger:list_breakpoints (MCP)
       ⎿  [
            {
              "file": "/Users/arthur/Documents/thirdparties/mdn/express-locallibrary-tutorial/app.js",
              "line": 35,
              "id": "2:34:0:file:///Users/arthur/Documents/thirdparties/mdn/express-locallibrary-tutorial/app\\.js"
            }
          ]
     
     ⏺ Let's try to execute a specific piece of code to check the connection variables:
   
     ⏺ nodejs-debugger:nodejs_inspect (MCP)(js_code: "// Get the mongoose module and inspect connection\nconst mongoose = …
                                           require('mongoose');\nconsole.log('Current mongoose version:',
                                           mongoose.version);\nconsole.log('Current mongoose connection state:',
                                           mongoose.connection.readyState);\n// Log connection string safely (without
                                           password)\nconst connectionString = process.env.MONGODB_URI || \n
                                           \"mongodb+srv://cooluser:coolpassword@cluster0.cojoign.mongodb.net/local_library?retryWr
                                           ites=true&w=majority&appName=Cluster0\";\nconsole.log('Connection string
                                           (masked):', connectionString.replace(/(?<=mongodb\\+srv:\\/\\/\\w+:)(.+?)(?=@)/,
                                            '*****'));")
     
       ⎿  Console output:
          [log] Current mongoose version: 8.9.5
          [log] Current mongoose connection state: 0
          [log] Connection string (masked): mongodb+srv://cooluser:coolpassword@cluster0.cojoign.mongodb.net/local_library?retryWri
          tes=true&w=majority&appName=Cluster0
   
     ⏺ The runtime error you're seeing in your application is related to MongoDB
       Atlas connection issues. Based on your error message, the problem is:
     
       1. You're using placeholder credentials ("cooluser:coolpassword")
     
       To fix this, you have two options:
     
       1. Use a local MongoDB instance by changing line 29-30 in app.js to:
       const dev_db_url = "mongodb://127.0.0.1:27017/local_library";
       2. Or correctly set up MongoDB Atlas:
         - Log into Atlas at https://cloud.mongodb.com
         - Go to Network Access and add your current IP to whitelist
         - Create proper database credentials
         - Update the connection string with real credentials
     
       Which option would you like to proceed with?