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Crossref

Crossref · Research dissemination

Membership organization that registers DOIs for scholarly content and exposes the metadata through a free public REST API, content negotiation and the paid Metadata Plus service

ProprietaryFreePaidNov 2, 2026

Zenodo

CERN (with OpenAIRE) · Research dissemination

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Free general-purpose research repository operated by CERN that assigns DOIs to datasets, software, papers and other outputs, with a REST API, OAI-PMH, GitHub release archiving and CC0 metadata

Open sourceFreeNov 2, 2026

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