OCLC APIs

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 our APIs.

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    VIAF (Virtual International Authority File)

    • Status: Production
    • Sandbox access: No

    Access to linked names for the same entity across the world's major name authority files, including national and regional variations in language, character set, and spelling.

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    API access to: VIAF

    WorldCat Identities

    • Status: Production
    • Sandbox access: No

    A service that provides personal, corporate and subject-based identities (writers, authors, characters, corporations, horses, ships, etc.) based on information in WorldCat.

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    WorldCat knowledge base API

    • Status: Production
    • Sandbox access: Yes

    A read-only service for e-resource discovery and linking. Provides developer-level access to a library's information in the WorldCat knowledge base. The WorldCat knowledge base combines data about your library's econtent with access to it through linking features.

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    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.

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    API access to: WorldCat

    WorldCat Registry

    • Status: Production
    • Sandbox access: Yes

    Developer-level access to information in the Worldcat Registry: a free global directory for libraries, consortia, archives and museums. (http://www.worldcat.org/registry/institutions)

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