One small helper, and Radar can see who started what.

A browser can't see which program owns a port. Radar's helper can: it reads your process list, works out which AI tool started each server, and stops one when you ask. Your browser starts it only when Radar needs it; it doesn't run in the background, and it never uses the network.

1. Download the installer for this computer

   macOS / Linux Windows

   Download

   It's generated right here for this copy of Radar (ID ), and contains the helper as readable source. You can read the helper first.

2. Run it in Terminal

   If your browser saved it somewhere other than Downloads, change the path.

   copy

3. Come back here

   This page checks every two seconds and turns green when the helper answers. No browser restart needed.

what it reads

Listening ports, and for each one its process, parent processes, working folder and a few environment markers (such as CLAUDECODE or CODEX_THREAD_ID), only for your own user.

what it asks

Each local server's home page, for its status, title and icon. Nothing beyond this computer.

what it changes

Nothing, unless you press Stop. Then it checks that the process is still the one you saw, sends the normal shutdown signal, and only forces it if you ask.

where it lives

who can start it

Only Radar. Chrome enforces this using the extension ID written into the helper's manifest.

to remove it

copy