lobid provides Linked Open Data (LOD) services for libraries, consisting of user interfaces (UIs) and application programming interfaces (APIs). lobid is run by the North Rhine-Westphalian Library Service Centre (hbz).
Linked Open Data provided in the Common Library Network (GBV). The service subsumes multiple parts (data about libraries, documents, vocabularies...) in different state of development. No API other than plain HTTP requests so far.