Install for Cursor

Build the extension first

Build and install the extension from source first (Quickstart); there is no published .ablx yet. With Live running, the extension has written a bridge.json (a port and a bearer token) into its storage directory.

Edit the config file

Cursor reads an mcp.json. Use the project file to scope Loophole to one project, or the global file to make it available everywhere.

• Project: .cursor/mcp.json
• Global: ~/.cursor/mcp.json

{
  "mcpServers": {
    "loophole": {
      "transport": "http",
      "url": "http://127.0.0.1:<port>/mcp",
      "headers": { "Authorization": "Bearer <token-from-bridge.json>" }
    }
  }
}

Replace <port> and <token-from-bridge.json> with the real values from bridge.json. Reload Cursor’s MCP servers (or restart Cursor) so it picks up the change.

The ableton-live skill’s /setup can write this file for you.

Verify it worked

1. Live 12.4.5b Suite is running with the Loophole extension active.
2. loophole appears in Cursor’s MCP server list as connected.
3. Ask the assistant to run live_get_song_overview (or live_find_track) and confirm it returns your real track names.

If the tool returns your actual tracks, the connection is correct. Otherwise see Troubleshooting.