The MusicBrainz Python Library by MusicBrainz is a client library for developers to get easier access to the MusicBrainz database using the XML web service. The MusicBrainz database contains a huge amount of music metadata, which is maintained by the MusicBrainz community.
Back in May I wrote about the race for either unified APIs or API standards to bridge the growing number of APIs in specific industries or areas. Unified APIs are created by a third party provider to bridge multiple APIs, while API standards would potentially create an industry-wide standard of how APIs should operate.
Chemical Abstracts Service (CAS) has announced that the SciFinder interface now includes a series of APIs that allows researchers and developers to integrate SciFinder functionality and the CAS database with third party research tools and workflows. SciFinder constitutes the world's largest chemistry database, and many scientist use the service to launch new research and as a reference check throughout the research process.
Peachnote is quite an innovative approach to music analysis. Developed by Vladimir Viro, a renaissance man who bridges the worlds of classical music and advanced mathematics, the Peachnote API provides the ability to search a large collection of public compositions by melody or sequence of chords.