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Crossref API
Metadata and DOIs for scholarly publications, handy for citation lookups.
| Category | Academic & Research |
|---|---|
| Authentication | No auth |
| Pricing | Free |
| Website | https://www.crossref.org/ |
| Docs | https://www.crossref.org/documentation/retrieve-metadata/rest-api/ |
| Last checked | 2026-10-14 |
| As JSON | /api/v1/directory/crossref-api.json |
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