This server is still running on my machine despite having "removed" Zoom a few months ago (macOS).

Guess I was a bit naive in thinking just trashing the .app and immediate artifacts in Library would do the trick.

EDIT: I missed the .zoomus directory in my home folder that had the culprit. Funny enough Zoom's instructions on how to uninstall the app on macOS just points to documentation from Apple and wikiHow (???) with standard methods that don't fully remove Zoom.