Web Services

If you’re ready to get down to the nitty gritty of OCLC web services, you’re in the right place. Find documentation for API URLs, content negotiation options, response formats and sample requests. Prefer to learn by doing? Try an API using our API Explorer.

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Add a WorldCat attribution to your site to help people connect WorldCat with libraries. Learn more »

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Web Services

    WorldCat Metadata API

    • Status: Production
    • Sandbox access: Yes

    The WorldCat Metadata API is a read-write service for WorldCat that makes it possible to add or update master bibliographic records in WorldCat, maintain holdings information, and work with local bibliographic data. In May 2020, the WorldCat Metadata API 1.1 was released to support searching WorldCat by all available indexes and retrieval of shared print information, such as retention commitments. This new version runs in parallel with the original WorldCat Metadata API.

    Try the API » Read the documentation »

    API access to: WorldCat