Last.fm

Muse can use last.fm to get artist biographies. You'll need to set the environment variables FM_KEY and FM_SECRET

To get those, create an API account here: https://www.last.fm/api/account/create

Spotify

Muse can use Spotify to get artist images. You'll need to set the environment variables SPOTIFY_ID and SPOTIFY_SECRET.

To get the environment variables, create an API application here: https://developer.spotify.com/dashboard/applications