WorldCat Search API

Developer-level Access to WorldCat - for bibliographic holdings and location data

  • Status: Production
  • Sandbox access: Yes

What you get

  • Search WorldCat and retrieve bibliographic records for cataloged items such as books, videos, music and more in WorldCat
  • Retrieve records in MARC XML or Dublin Core formats
  • Get item information in the standard bibliographic citation formats (APA, Chicago, Harvard, MLA, and Turabian
  • Find about libraries that own an item and retrieve links to online catalog records when available.

Who can use it

  • Libraries that maintain both WorldCat Discovery and OCLC Cataloging subscriptions.
  • Partners interested in integrating WorldCat data into their software
  • Anyone can request sandbox access to this web service
  • This API has specific Terms and Conditions.

Commercial partnerships are also available.

Authentication & Authorization

The WorldCat Search API supports the WSKey Lite pattern.


API access to

Service categories


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Other Resources

We are a worldwide library cooperative, owned, governed and sustained by members since 1967. Our public purpose is a statement of commitment to each other—that we will work together to improve access to the information held in libraries around the globe, and find ways to reduce costs for libraries through collaboration. Learn more »