Recent news
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APIs are the first built using new strategy and infrastructure
New versions of the WorldCat Search and Metadata APIs were the first developed using OCLC's new API strategy and cloud-based infrastructure.
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WMS Acquisitions API release, 26 March 2021
The next release of the WMS Acquisitions API is scheduled for 26 March 2021.
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Call for proposals: DevConnect 2021
OCLC invites you to contribute your insights and projects to DevConnect 2021.
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Planned maintenance: Classify User Interface, 25 February
OCLC will be performing maintenance on the Classify User Interface on 25 February 2021 at 9:00am Eastern US (UTC -5).
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Search API 2.0 ‘heldinState’ parameter change
On 12 February 2021 we are installing a new version of WorldCat Search API 2.0 so the ‘heldinState’ parameter aligns with ISO standards and better supports global holdings.