The Spotify Web Java Library provides a wrapper to the Spotify Web API. The library provides helper functions for interacting with your music library, authentication, browsing, searching, profiles, playlists, and music metadata.
Shoutcast maintains a radio directory of 50,000+ radio stations from all around the world. The company, owned by AOL, released its first Shoutcast API a few years ago, but has since released version 2.0. The updated API provides developers with more advanced options for integrating music streaming services into web services and mobile applications using RESTful calls formatted in XML, JSON and RSS.
In what might be a first in the world of open APIs and mashups, a developer has been sued by a major corporation for developing an application using a third party web service API. As TechCrunch's Jason Kincaid reports, Ryan Sit, the talented developer behind a number of popular mashups is being sued by EMI for his application Favtape because it uses the Seeqpod API. Of course it's not unusual for a record label to aggressively use the courts to defend copyright, but this appears to take the battle to a new ground. As Jason describes: