Verified Sourcepaths · REST API

Unpaywall REST API v2

healthy

Publisher

OurResearch (Unpaywall)

Human landing

https://unpaywall.org/products/api

Artifact URL

https://api.unpaywall.org/v2/

Copy artifact URL

Auth

mailto polite pool

Rate limit

Email parameter required for the polite pool. Documented ceiling is 100,000 calls/day.

Evidence

doi · open-access · scholarly-metadata

Publisher identity: OurResearch (Unpaywall) Artifact relationship: official domain Automated access: plain GET succeeded Integrity hash: d4c47ec3e462… Parseability: valid Effects: read Licensing: Unpaywall data is available for automated use per OurResearch terms. Freshness: Sep 17, 2026, 7:10 PM PDT

Notes

Left on the documented v2 root. A DOI lookup needs ?email=, and embedding a contact address in artifact_url would leak it into git, D1, and every public page. The root already returns JSON; the checker User-Agent carries mailto for the polite pool.

Tasks this artifact can answer

• resolve a DOI to open-access location via Unpaywall
• check whether a scholarly work has an OA copy

Change history

• healthySep 17, 2026, 7:10 PM PDT · HTTP 200
• healthySep 17, 2026, 7:03 PM PDT · HTTP 200
• healthySep 17, 2026, 6:57 PM PDT · HTTP 200
• healthySep 17, 2026, 6:57 PM PDT · HTTP 200
• healthySep 17, 2026, 6:55 PM PDT · HTTP 200
• healthySep 17, 2026, 6:55 PM PDT · HTTP 200
• healthySep 17, 2026, 6:06 PM PDT · HTTP 200
• healthySep 17, 2026, 6:01 PM PDT · HTTP 200
• healthySep 17, 2026, 5:06 PM PDT · HTTP 200
• healthySep 17, 2026, 4:22 PM PDT · HTTP 200
• healthySep 17, 2026, 4:22 PM PDT · HTTP 200
• healthySep 16, 2026, 8:36 PM PDT · HTTP 200
• healthySep 16, 2026, 7:55 PM PDT · HTTP 200
• healthySep 16, 2026, 7:54 PM PDT · HTTP 200