What schema does ORCID use? ← Frequently Asked Questions about the ORCID API The ORCID API uses the ORCID Messages Schema. We've described the portions of the schema most integrators use in more detail at ORCID XML. For more information, see: API FAQ: What version of the schema should I use? API FAQ: What format can I export records in? Can I get them in a CVS or XLS spreadsheet? API FAQ: How will I be notified of changes and updates to the API and schema?