JS Reverse Server
为 AI Agent 设计的 JS 逆向 MCP Server，内置反检测，基于 chrome-devtools-mcp 重构 | JS reverse engineering MCP server with agent-first tool design and built-in anti-detection. Rebuilt from chrome-devtools-mcp.
What is JS Reverse Server?
JS Reverse Server is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to 为 ai agent 设计的 js 逆向 mcp server，内置反检测，基于 chrome-devtools-mcp 重构 | js reverse engineering mcp server with agent-first tool design and built-in anti-detection. rebuilt from chrome-devtools-mcp.
为 AI Agent 设计的 JS 逆向 MCP Server，内置反检测，基于 chrome-devtools-mcp 重构 | JS reverse engineering MCP server with agent-first tool design and built-in anti-detection. Rebuilt from chrome-devtools-mcp.
This server falls under the Security category on MCPgee, the world's largest MCP server directory with 33,000+ servers.
Features
- 为 AI Agent 设计的 JS 逆向 MCP Server，内置反检测，基于 chrome-devtools-mcp
Use Cases
Maintainer
Works with
Installation
Manual Installation
npx js-reverseConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
How to Set Up and Use JS Reverse Server
JS Reverse MCP Server is an AI-agent-first JavaScript reverse engineering tool rebuilt from chrome-devtools-mcp with a focus on anti-detection and streamlined tool design. It exposes Chrome DevTools Protocol capabilities as MCP tools so AI agents can navigate pages, inspect scripts, set breakpoints, monitor network traffic, and execute JavaScript—all while evading bot detection through Patchright's protocol-level patches. Chinese and English documentation is provided, and the server is designed for security researchers automating complex deobfuscation and hook-injection workflows.
Prerequisites
- Node.js v20.19 or later
- Chrome browser (stable channel) installed
- An MCP-compatible client such as Claude Desktop
- npm or npx for running the package
Add the server to Claude Desktop
Configure Claude Desktop to run js-reverse-mcp via npx. This is the same underlying package as the js-reverse-mcp entry—both slugs point to the same npm package.
{
"mcpServers": {
"js-reverse": {
"command": "npx",
"args": ["js-reverse-mcp"]
}
}
}Clone and build for local development
For customization, clone the repository and build the TypeScript source.
git clone https://github.com/zhizhuodemao/js-reverse-mcp.git
cd js-reverse-mcp
npm install
npm run buildRun with built-in anti-detection
Use the --cloak flag for CloakBrowser fingerprint patching and --isolated for ephemeral browser sessions that discard state on close.
{
"mcpServers": {
"js-reverse": {
"command": "npx",
"args": ["js-reverse-mcp", "--cloak", "--isolated"]
}
}
}Navigate to a target and list scripts
Once connected, ask the AI agent to navigate to a URL and enumerate all JavaScript resources. This is typically the first step in any reverse engineering workflow.
Set breakpoints and capture runtime state
Use the debugging tools to set breakpoints on specific functions or XHR calls, trigger user actions, then inspect the paused execution scope to extract encryption keys or algorithm logic.
JS Reverse Server Examples
Client configuration
Claude Desktop configuration using the js-reverse-mcp npm package with anti-detection flags.
{
"mcpServers": {
"js-reverse": {
"command": "npx",
"args": ["js-reverse-mcp", "--cloak"]
}
}
}Prompts to try
After connecting the MCP server, try these reverse engineering prompts with the AI agent.
- "Navigate to the target site and list all JavaScript files loaded"
- "Search for obfuscated function names containing 'sign' or 'token' across all scripts"
- "Set a breakpoint on fetch() calls and capture the request headers"
- "Analyze this minified script and explain what it does"
- "Inject a hook on localStorage.getItem and log all key accesses"
- "Monitor XHR requests and show me the parameters being sent to /api/auth"Troubleshooting JS Reverse Server
Chrome does not launch or crashes immediately
Verify Chrome stable is installed. On Linux, ensure `google-chrome` or `chromium-browser` is in your PATH. The server auto-launches Chrome; if it fails, start Chrome manually with `--remote-debugging-port=9222` and use the `--browserUrl http://localhost:9222` flag.
Target website detects the automation tool
Add the --cloak flag to enable CloakBrowser's 49 C++ patches that neutralize canvas fingerprinting, WebGL, audio context, and GPU-based detection. Patchright already prevents Runtime.enable CDP leakage by default.
Breakpoints are not being hit
Ensure the script is loaded before setting the breakpoint. Use the list-scripts tool first, then set the breakpoint by exact function name or line number. For dynamically loaded scripts, use XHR-based breakpoints that trigger on network activity instead.
Frequently Asked Questions about JS Reverse Server
What is JS Reverse Server?
JS Reverse Server is a Model Context Protocol (MCP) server that 为 ai agent 设计的 js 逆向 mcp server，内置反检测，基于 chrome-devtools-mcp 重构 | js reverse engineering mcp server with agent-first tool design and built-in anti-detection. rebuilt from chrome-devtools-mcp. It connects AI assistants to external tools and data sources through a standardized interface.
How do I install JS Reverse Server?
Follow the installation instructions on the JS Reverse Server GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.
Which AI clients work with JS Reverse Server?
JS Reverse Server works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.
Is JS Reverse Server free to use?
Yes, JS Reverse Server is open source and available under the Apache-2.0 license. You can use it freely in both personal and commercial projects.
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