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apiacre.com research crossref-doi-metadata
https://apiacre.com/v1/research/crossref-doi-metadata
answers 402
Resolve one DOI into normalized open Crossref bibliographic, author, container, citation-count, license, identifier, and correction or retraction-link metadata without abstracts or full text.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.003
- Network
- base
- Pay to
- 0xa0BFa4f07281c9b248DC3AED2217836BcA24869B
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 139 ms
- Payment options
- 2 usable of 2
- Last checked
- 2026-09-06T01:14:17.936Z (22d ago)
- Category
- search
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fapiacre.com%2Fv1%2Fresearch%2Fcrossref-doi-metadata"