Entity Changes API

Learn when there are changes to WorldCat® Entities data. 

  • Status: Production
  • Sandbox access: No

What you get

The Entity Changes API provides a feed of changes across WorldCat Entities data, which allows users to update any local cache with the updated data. 

This API is included with an OCLC Meridian® subscription and is part of a suite of WorldCat Entities APIs that enables a variety of functions for creating, managing, and analyzing entity data. Other APIs in the set include:

  • Entity Management API
  • Entity Search API
  • PID Lookup API

WorldCat Entities APIs available as add-ons to an OCLC Meridian subscription:

  • Entity Connections API
  • Entity Query API

Who can use it

  • OCLC Meridian subscribers