Developer-level Access to WorldCat - for bibliographic holdings and location data
Search WorldCat and retrieve bibliographic records for cataloged items, information about libraries that own the items and links to online catalog records when available.
Interested in commercial use of this service? Contact us.
Initially 50,000 queries a day. Can be raised by request
SRU, Open Search
MARCXML (SRU), Dublin Core (SRU), Atom (OpenSearch), and RSS (OpenSearch). JSON options for lists of nearby libraries (holdings)
The OCLC Developer Network supports the use of OCLC Web Services—a set of tools and APIs that expose data and services for WorldCat and our member libraries and partner institutions or companies. learn more »
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