#8888th of 111 in MCP servers for developers
js-reverse-mcp
MCP server for debugging page JavaScript, breakpoints and network from an AI agent
- Stars
- 3.1k
- License
- Apache-2.0
- Last commit
- Sep 2026
- Last release
- Sep 2026
- Language
- TypeScript
828 on 21 Apr 20263,064 on 10 Nov 2026
From GitHub's daily star counts.
Checked on GitHub.
Overview
JS Reverse MCP exposes 24 tools that let an MCP client list and search page scripts, set breakpoints, step through code, evaluate in paused call frames, and inspect network and WebSocket traffic. Results can be saved to local files for later analysis. It drives Chrome through a maintained Patchright fork, with an optional CloakBrowser binary for sites that fingerprint browsers.
Who it is for: Engineers doing web JS reverse engineering with Claude, Cursor or Codex
Strengths
- Breakpoints, stepping and call-frame evaluation, including text-based breakpoints for minified code
- Exports script source and raw request data to files instead of filling chat context
- Persistent login profile by default, with --isolated for a clean profile
- --allowedRoots restricts which local directories the agent can read and write
Weaknesses
- Without --allowedRoots, local file access is unrestricted and only a startup warning is printed
- --cloak downloads a ~200MB binary on first launch, silently unless pre-installed
- Network and debugger domains stay inactive until a tool needs them, so first-load capture needs a reload
- README is Chinese-first and carries sponsor advertising
What it needs
- no GPU
- Needs Node.js 20.19+, Google Chrome (stable), Patchright fork (@zhizhuodemao/patchright), CloakBrowser (optional)
Quick answers
Is js-reverse-mcp open source?
Yes. Its code is on GitHub under the Apache-2.0 license.
Also in MCP servers for developers
See all 111| Rank | Project | Score |
|---|---|---|
| 1 | gitnexusCode knowledge graph exposed to coding agents through MCP tools | 96 out of 100 |
| 2 | codegraphLocal code knowledge graph that coding agents query over MCP | 95 out of 100 |
| 3 | playwright-mcpMCP server that lets LLMs drive a browser through Playwright accessibility snapshots | 92 out of 100 |
| #4 | code-review-graphLocal Tree-sitter code graph that gives coding assistants review context over MCP | 92 out of 100 |
| #5 | serenaMCP server giving coding agents symbol-level code search, editing and refactoring | 91 out of 100 |