WorldCat Metadata API 2.0 release notes, June 2025

POST/worldcat/manage/institution/holdings/move

You can now move your holdings with all LBDs and LHRs from one bibliographic record to another. All LBDs and/or LHRs that are associated with the source record will move to the target record. The holdings will be set on the target record and unset on the source record. 

Requests to this endpoint are accepted for asynchronous processing. You can check the status of your request by returning current institution holdings for the source bibliographic record with the GET/worldcat/manage/institution/holdings/current endpoint. 

Example response:

{
  "sourceControlNumber": "1",
  "requestedSourceControlNumber": "1",
  "targetControlNumber": "2",
  "requestedTargetControlNumber": "2",
  "success": true
  "message": "Request to move holdings was accepted for processing.",
  "action": "Move Holdings"
}

GET/worldcat/search/institution

You can now retrieve identifiers for an institution using WorldCat Registry IDs or OCLC symbols. 

Example response:

{
    "entries": [
        {
            "registryId": 91475,
            "oclcSymbols": [
                "OCWMS"
            ]
        }
    ]
}