Empower your software with the world's biggest music platform
This API is used to build application-like functionality made to reside inside the Spotify client. It's mainly used to extend or complement some aspect of Spotify.
Libspotify is a C API package with third party wrappers for many programming languages. Used for stand-alone applications, hosted outside of the Spotify client.
The Spotify Play Button is an easy way to add music listening capabilities to any website. The user must have the Spotify client installed however.