I always seem to miss new albums from music artists I like, and I haven't been happy with any existing services (they either cost $ or only work with Spotify, which doesn't have all the artists I listen to). So I built a simple tool to pull data from MusicBrainz for whatever artists you want.
It runs entirely locally (sqlite db) and can be used as a CLI (also works well with agents) or with a local web UI. It can optionally notify you with emails, or you can just check it periodically. I've already found a bunch of releases I missed from my favorite artists.