This lookup service is provided by the Blue Core project to support authority lookup for single terms and search for terms matching a query. It is maintained and operated by Cornell University Library. See Usage for more information on the API.

The Blue Core Look-UP (BCL-UP) service is an evolution of the LD4P Lookup Service that was built as part of the Linked Data for Libraries - Labs and Linked Data for Production projects that were funded through grants from the Andrew W. Mellon Foundation.