mcp-debugger MCP server

by debugmcp·io.github.debugmcp/mcp-debugger·v0.26.0·169 stars

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Step-through debugging for AI agents: breakpoints, stepping and live variables in ten languages

A94/100grade A

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A94/100

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169 stars1.1k downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

mcp-debugger tools

No tool declarations could be read from the package source. They show once the server is installed.

Not scanned yet. New listings are scanned within a day or two of arriving.

How mcp-debugger compares

Against every graded MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score: 94/100; higher than 96% of 48,255 servers
GitHub stars: 169; more than 95% of 28,688 servers
Downloads a week: 1,093; more than 95% of 12,191 servers with a package

Release history: 2 versions in the registry since 2026-09-30, latest 2026-10-31, typically one every 30 days.

Install mcp-debugger in Claude Code, Cursor or VS Code

Runs npx -y @debugmcp/mcp-debugger on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add mcp-debugger -- npx -y @debugmcp/mcp-debugger

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What the publisher says

From the mcp-debugger repository's README, as published. We do not edit it. Read it on GitHub

mcp-debugger

A headless, agentic debugger over MCP — let your AI agents debug running programs in nine languages.

🎯 Overview

mcp-debugger is a Model Context Protocol (MCP) server that exposes step-through debugging as structured tool calls. It lets AI agents set breakpoints, inspect variables, evaluate expressions, and step through running programs across nine languages — driving real language debuggers through the Debug Adapter Protocol (DAP).

No IDE required. mcp-debugger runs anywhere Node.js runs: CI runners, Docker containers, Kubernetes pods, SSH boxes, and the sandboxes that cloud coding agents live in. It's the debugger for where IDEs can't go.

When to use mcp-debugger vs an IDE-bound debug server

Microsoft's DebugMCP exposes VS Code's debugger over MCP and is a good choice when your agent works inside a running VS Code. The two projects make different structural trade-offs:

If your agent runs in a terminal, a pipeline, or a cloud sandbox — or needs to attach to a process on another machine — you want mcp-debugger.

Shortened. The full README is on GitHub.

Nothing above is checked by us. What we check is on the safety report.

mcp-debugger: common questions

Is mcp-debugger MCP server safe?: Yes, by our scan: it is graded A (94/100). Read the mcp-debugger safety report
How do I install mcp-debugger?: It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does mcp-debugger need an API key?: Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is mcp-debugger maintained?: The last commit was 34 days ago (2026-09-30). The latest release is v0.26.0.
How does mcp-debugger compare with other MCP servers?: safety score 94/100 (higher than 96% of 48,255 servers); github stars 169 (more than 95% of 28,688 servers); downloads a week 1,093 (more than 95% of 12,191 servers with a package). Full comparison.