WorldCat Registry API transition resources
Access to the WorldCat Registry API will end on 30 November 2025.
Since this API was first introduced, we’ve released new services and more contemporary, full-featured APIs that provide superior user experiences and deliver the functionality today’s users expect. Other OCLC APIs and services now provide enhanced features that surpass the capabilities of the WorldCat Registry API.
Here are some advantages offered by our newer APIs:
- Increased security. Our contemporary authentication technology patterns ensure a higher level of security for your library's data.
- Uniform data model. We have adopted JSON as the standard format for data exchange, making it easier to understand and work with.
- Enhanced features.
Recommended transition paths
We encourage you to implement alternate OCLC solutions for your primary uses of the WorldCat Registry API 1.0.
Current WorldCat Registry API 1.0 use |
Recommended alternative |
Convert OCLC Symbol to RegistryID or RegistryID to OCLC Symbol |
|
Look up holding and shelving codes to use in LHRs |
|
Find Libraries near a specific set of geocoordinates - latitude, longitude |
Library Profiles API* |
Find Libraries in a specific State, Province, Postal Code or Country
|
|
Find Libraries by their Name |
|
View basic information about a Library such as address, website url, branches, and phone number |
Library Profiles API* |
*Included in WorldCat Discovery Premium API package
Support for your transition
Our API team is committed to supporting your transition from the WorldCat Registry API to a newer OCLC API or service.
Learn from an API expert
- OCLC APIs Office Hours. Office Hours provide an opportunity for you to discuss questions related to your institution’s transition with OCLC API experts.
View past OCLC APIs Office Hours
Register for future Office Hours
Help for specific transition tasks
- Library Profile API technical documentation
- Compare with WorldCat Registry API technical documentation
Personal assistance when you need it