Hi, the default port is 3333, which should be exposed if you’re using the example configuration here: https://bitmagnet.io/setup/installation.html - I’m not sure what the app is in your screenshot but the provided config definitely exposes that port and is tested on Docker for Mac.
Scraping torrent sites will be avoided is it’ll be prohibitively slow and break the self-sufficiency concept - we’ll infer as much as possible from the torrent meta info alone. You could have a guess at the bitrate from the file sizes. Sonarr/Radarr will already do this for you with quality profiles I think.