Crossref REST API
Crossref
Up· checked 14 Nov 2026, 01:55 UTCUser-AgentScience & research
DOI metadata for 150M+ records; add mailto in UA for polite pool.
Details
- Access
- User-AgentOpen, but asks clients to identify themselves with a User-Agent header.
- Coverage
- global
- Updates
- daily
- Formats
- JSON
- License
- CC0 (metadata)
- API base
https://api.crossref.org/- Tags
- doi, metadata, publications
- Added
- 14 Nov 2026
Status checks
Up Last check 14 Nov 2026, 01:55 UTC, HTTP 200, 1,170 ms.
30-day uptime 100% (1 of 1 checks passed).
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- 14 Nov 2026, 01:55 UTC: up, HTTP 200, 1170 ms
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