Head to head
Openlibrary vs Crossref
Same numbers we show everywhere else, lined up. Ratings come from users, the grade comes from our scanner, adoption comes from public registries.
No reviews yet
Search books and authors, fetch editions, browse subjects, and resolve cover images.
Full listingCrossref
Cio.github.mrfentmen/crossref-mcpNo reviews yet
Search scholarly works and resolve DOIs through Crossref. No key required.
Full listingThe short version
Neither has been reviewed yet, so the comparison rests on the scan and the public usage numbers. The safety scan favours Openlibrary (93/100 against 65). Openlibrary is hosted and callable through the gateway; Crossref runs on your own machine. Openlibrary has noticeably more public adoption.
| Openlibrary | Crossref | |
|---|---|---|
| User rating | No reviews yet | No reviews yet |
| Safety grade | A93/100 | C65/100 |
| Adoption | Growing | — |
| GitHub stars | 4 | – |
| Downloads / week | 428 | – |
| Runs where | Hosted (remote) | Your machine (local) |
| Gateway-ready | Yes | No |
| Tools | 10 | 2 |
| Write actions | — | — |
| Price per call | Free | Free |
| Licence | Apache-2.0 | MIT |
| Last release | 2026-09-19 | — |
| Category | Web search | Web search |