KaBOOM + Cursor

KaBOOM is an open-source MCP server that gives Cursor’s AI real-time access to browser console logs, network errors, exceptions, WebSocket events, and live DOM state. Zero dependencies.

Configuration

Add to ~/.cursor/mcp.json:

{
  "mcpServers": {
    "kaboom": {
      "command": "npx",
      "args": ["-y", "kaboom-agentic-browser"]
    }
  }
}

Or use Cursor’s UI: Settings → MCP Servers → Add Server:

{
  "kaboom": {
    "command": "npx",
    "args": ["-y", "kaboom-agentic-browser"]
  }
}

Usage

After restarting Cursor, the AI can:

• See console errors and warnings
• Inspect failed network requests with response bodies
• Query the live DOM with CSS selectors
• Check WebSocket connection states
• Run accessibility audits

Ask: “What browser errors are happening?” — Cursor queries KaBOOM automatically.

Troubleshooting

1. Restart Cursor after adding config
2. Check MCP status in settings panel
3. Verify the KaBOOM extension shows “Connected” in the popup