API Acre
Search open Crossref bibliographic metadata by title, author, DOI fragment, or citation and return bounded normalized publication, author, citation, license, and update metadata without abstracts or full text.
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 78 ms
- Price
- $0.008 per call
- Paying buyers, last 30 days
- 1 (directory's own records)
- Paid calls, last 30 days
- 1
- Category
- Research, reports and analytics
- Address
- https://apiacre.com/v1/research/crossref-work-search
Accuracy
Accuracy scores are published once a seller has enough paid checks against an independent record (at least 7 scored answers over at least 7 days). Until then no score is shown, and a missing score is never a pass.
For agents
This page as JSON: /sellers/972c11b6f38b.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).