xfactor

MCP server that connects AI agents to browser DevTools via CDP (Chrome DevTools Protocol).

Give your AI agent real-time access to browser console logs, network requests, and page state.

Features

• Real-time console logs capture (errors, warnings, info, debug)

• Network request/response monitoring

• Page state (URL, title, viewport)

• Works with any AI agent that supports MCP (Claude, etc.)

Related MCP server: chrome-dev-mcp

Quick Start

# Install dependencies
pnpm install

# Start the server (spawns Chrome + MCP server)
pnpm dev

Connect to your AI Agent

HTTP Mode (Recommended)

The server runs on http://localhost:3001 by default.

Claude Desktop

Add to your claude_desktop_config.json:

{
  "mcpServers": {
    "xfactor": {
      "url": "http://localhost:3001/mcp"
    }
  }
}

Other Agents

Point your MCP client to: http://localhost:3001/mcp

Available Tools

get_browser_context

Get browser state including console logs and network requests.

{
  "includePageState": true,
  "includeLogs": true,
  "includeRequests": true
}

Returns:

• status - Connection status, CDP port, attached pages

• pageState - Current URL, title, viewport

• consoleLogs - Array of captured console messages

• networkRequests - Array of captured network requests

refresh_browser

Refresh the page to capture logs from page load.

{
  "clearLogs": true
}

Configuration

Environment Variables

• CDP_PORT - Chrome DevTools Protocol port (default: 9222)

• TARGET_URL - URL to monitor (default: localhost:3000)

xmcp.config.ts

const config: XmcpConfig = {
  http: { port: 3001 },
  // ... other options
};

How It Works

1. pnpm dev spawns a Chrome instance with remote debugging enabled

2. MCP server connects to Chrome via CDP

3. CDP listeners capture console logs and network activity

4. AI agents query the captured data via MCP tools

Requirements

• Node.js >= 20

• Google Chrome installed

• pnpm

License

MIT