The DataCite EZ API was first introduced in 2017 to assist those of our Members who transitioned from the California Digital Library (CDL) EZID service. Users were able to make the same API calls they used to make to EZID, just using the DataCite endpoint instead. This was introduced as a temporary solution to support easy transition of services. Finally, 4 years later, it is time to retire the DataCite EZ API.