* CLARIN centres
 * See [https://centres.clarin.eu/oai_pmh Centre Registry]
* [https://www.hathitrust.org/ Hathi Trust]
 * [http://quod.lib.umich.edu/cgi/o/oai/oai?verb=Identify http://quod.lib.umich.edu/cgi/o/oai/oai]
* [http://www.theeuropeanlibrary.org The European Library]
 * [http://data.theeuropeanlibrary.org/oaipmh/OaiPmhHandler?verb=Identify http://data.theeuropeanlibrary.org/oaipmh/OaiPmhHandler] (restricted access based on client IP)
 * See also [http://labs.europeana.eu/api/oai-pmh-introduction]