If you just want correct metadata (no own adjustments), then getting it from the MusicBrainz database is probably easiest. You can use MusicBrainz Picard for that: https://picard.musicbrainz.org
It does also seem to have a scripting API. No idea how well that works, though.
https://www.mp3tag.de/en/ could be useful if your files are already uniformly named and if you're on Windows
Or if you want to edit multiple files in the same way simultaneously (e.g. adjust album or artist name)
Yeah that one is very good.
Musicbrainz Picard if you like graphical interfaces.
Beets if you like the command line.
If you just want correct metadata (no own adjustments), then getting it from the MusicBrainz database is probably easiest. You can use MusicBrainz Picard for that: https://picard.musicbrainz.org
It does also seem to have a scripting API. No idea how well that works, though.
This looks nice, thanks!
Ive used easytag in the past.
There's also KID3 and Foobar2000.
+1 for kid3
I became obsessive with beets. It uses MusicBrainz IDs to sort all of the files. https://beets.io/
I do it in Winamp, but you probably just want a dedicated software like the other commenters proposed