OAI-PMH Registered Data Providers - Discontinued

Registration of OAI-PMH conforming repositories has been discontinued (2025-07-18). Repository validation is supported.

Historical data listing base URLs of registered data providers at the time of discontinuation is avalable from https://www.openarchives.org/Register/ListFriends.

The list of sites found still to be running OAI-PMH v1.1 on 2002-12-01 that were purged from the registered list is also available from https://www.openarchives.org/OAI/RejectedSites.