In preparation for some upcoming schema changes, we have added a new field to records in the REST API. Authors, editors, translators, and contributors will have a ‘role’ field. We will make an announcement in the coming weeks about how this will be used going forward, however REST API users may already notice some changes immediately.
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The role field is visible. This is an additional field in author, contributor, editor, and other fields related to contributions. See, for example:
https://api.crossref.org/v1/works?filter=from-created-date:2026-05-22&select=DOI,author -
Peer reviewer contributions are more consistently represented. We have had inconsistency between different APIs for some time: contributors with the role ‘reviewer’ in XML output have been listed under ‘author’ in the REST API. We have now fixed this. See, for example:
https://api.crossref.org/v1/works/10.1111/efp.12765/v1/review2
All peer reviews have been reindexed in order to make the changes visible.