Verified Sourcepaths · REST API

Crossref REST works API

healthy

Publisher
Crossref
Human landing
https://www.crossref.org/documentation/retrieve-metadata/rest-api/
Artifact URL
https://api.crossref.org/works
Auth
mailto polite pool
Rate limit
From 21 July 2026, polite-pool limits are 10/s for single-DOI reads and 3/s for list/filter queries; public (no email) is 5/s single and 1/s list. Limits are keyed on the identifying email, not the IP. Contact info via mailto= or User-Agent.

Evidence

bibliometrics · doi · scholarly-metadata

Publisher identity: Crossref Artifact relationship: official domain Automated access: plain GET succeeded Integrity hash: not yet hashed Parseability: valid Effects: read Licensing: Metadata openly available. Freshness: Sep 17, 2026, 7:10 PM PDT

Notes

Polite-pool routing depends on identifying the checker. Crossref now rate-limits on the email address, so FEDERATION_CONTACT_EMAIL must stay deliverable. Result sets change every fetch, so the checker omits content_hash.

Tasks this artifact can answer

Change history