devtools-debugger-mcp-nodejs

Skill by ara.so — Devtools Skills collection.

An MCP (Model Context Protocol) server that exposes comprehensive Node.js debugging capabilities through the Chrome DevTools Protocol. Enables AI assistants to set breakpoints, step through code, inspect variables, evaluate expressions, analyze call stacks, and work with source maps — all programmatically.

What It Does

This MCP server launches Node.js applications with the built-in inspector (--inspect-brk=0), connects via WebSocket to the Chrome DevTools Protocol, and exposes debugging operations as MCP tools. It handles:

• Session management: Launch/stop Node.js processes with debugging enabled
• Breakpoints: Set line breakpoints, conditional breakpoints, logpoints, and pause-on-exceptions
• Execution control: Resume, step over/into/out, continue to location, restart frames
• Inspection: Explore scopes (locals, closures, this), drill into object properties
• Evaluation: Execute JavaScript expressions in paused call frames
• Console capture: Buffer and retrieve console output between pauses
• Source maps: Full TypeScript and transpiled code debugging support
• Script management: List loaded scripts, fetch sources, blackbox patterns