[ajflores1604]

Could probably roll something yourself using Spotify API. Has tempo available as a query https://developer.spotify.com/documentation/web-api/referenc...

[drewg123]

This exists. I use it daily & it is awesome. Its called spotifyd: https://github.com/Spotifyd/spotifyd

[mixmastamyk]

I don't really understand how this fits in.