Seevl is a new kind of music discovery engine. It allows you to find how artists are similar to each other and which artists are most similar to each other, among other things. It also allows you to comment on the notes about artists within the database. This is all well and good, but better yet, it has the Seevl API, allowing developers to integrate Seevi into their own applications.
Last December, Senzari launched the MusicGraph music recommendation and data access engine as well as the new MusicGraph API. Earlier this month, Senzari opened the MusicGraph API to the public, unveiling the API at the first-ever annual SXSW Music Hackathon Championship. Among the apps included in the list of overall grand prize finalists is Party Play which uses the MusicGraph API to create "a dynamic DJ for parties."