KSoft.Si Lyrics
API to get lyrics for songs

Music.
LastFm API is a free Music API that requires apiKey authentication, is served over HTTPS and has unconfirmed CORS support.
The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
Details from last.fm.

Unified API suite · now live
Geocode an address, validate an email, track a flight or pull stock data with one account, one dashboard and one API key.
API to get lyrics for songs
The LastFm API is provided by Last.fm (last.fm). The world's largest online music service. Listen online, find out more about your favourite artists, and get music recommendations, only at Last.fm
Yes. The LastFm API is listed in the Music category of the public-apis directory, which only includes APIs that are free or have a free tier. Check its documentation for rate limits and paid plans.
Yes. The LastFm API uses apiKey authentication, so you need to register for credentials before making requests.
CORS support for the LastFm API is unknown. Test a request from the browser, and fall back to a server-side call if it is blocked.
Yes. The LastFm API is served over HTTPS, so it's safe to use in production.