OCLC API documentation

developer.api.oclc.org is the new home for OCLC API documentation. So, if you’re ready to get to the technical details of OCLC APIs, you’re in the right place. Find documentation for API URLs, content negotiation options, response formats, sample requests, and more by selecting an API from the left menu. We have also added code examples to make getting started easier than ever.

Check out our latest release, the WorldCat Search API 2.0.

For general information about OCLC APIs or how to get access, visit the OCLC Developer Network.