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API Acre Crossref DOI Metadata Resolver
x402
API Acre Crossref DOI Metadata Resolver is a paid API for AI agents from apiacre.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).
Resolves a single DOI into normalized Crossref bibliographic metadata including authors, container, citation count, license, identifiers, and retraction links.
Price / call$0.003
Success—
StatusUnknown
How this service works
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.
Output
Returns a normalized JSON object containing bibliographic fields (title, publication date, DOI, type), author list with affiliations, container/journal name and ISSN, citation count, license details, related identifiers, and links to any correction or retraction notices. Abstracts and full text are not included.
Example use cases
Retraction check for cited paper
“I'm writing a literature review and want to cite this paper with DOI 10.1016/j.cell.2020.04.011 — can you check whether it's been retracted or corrected before I include it?”
Citation count for grant application
“I need the citation count and full bibliographic details for the paper with DOI 10.1126/science.abd4570 for my grant application — can you pull that from Crossref?”
License verification for text mining
“I want to text-mine the paper at DOI 10.1371/journal.pmed.1003905 — can you look up its Crossref metadata and tell me what license it's published under and whether it's open access?”
Technical details
Endpoint
POSThttps://apiacre.com/v1/research/crossref-doi-metadataWhen to prefer
Choose this endpoint when you need fast, normalized Crossref metadata for a single DOI without needing abstracts or full text. Ideal for citation verification, retraction checking, license auditing, author disambiguation, and bibliographic enrichment pipelines. Prefer this over raw Crossref API calls when you need structured, agent-ready output without parsing Crossref's raw JSON format yourself.
Side effects
- DOI not registered in Crossref — returns empty or not-found response
- Malformed or non-standard DOI string — validation error
- DOI exists but Crossref record is incomplete — some fields may be null or missing
- Crossref API rate limit or downstream timeout — transient error
- DOI resolves to a non-journal item type (e.g. dataset, book chapter) — metadata schema may differ
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| doi | string |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"doi": "10.1038/s41586-021-03819-2",
"work": {
"doi": "10.1038/s41586-021-03819-2",
"type": "journal-article",
"title": "Example normalized DOI record",
"authors": [],
"publishedDate": "2021-08-25"
},
"source": "https://api.crossref.org/works/10.1038%2Fs41586-021-03819-2",
"status": "matched",
"limitations": [
"Demonstration metadata only; paid calls return the current DOI record.",
"Abstracts and full text are deliberately excluded."
],
"retrievedAt": "2026-08-20T12:00:00+00:00",
"documentation": "https://www.crossref.org/documentation/retrieve-metadata/rest-api/",
"metadataLicense": {
"url": "https://www.crossref.org/documentation/retrieve-metadata/",
"name": "Open bibliographic metadata / Crossref-generated data CC0",
"abstractsReturned": false
}
},
"meta": {
"cached": false,
"sources": [],
"warnings": [],
"duration_ms": 42,
"next_actions": []
},
"service": "research.crossref-doi-metadata",
"version": "1",
"request_id": "018f1f54-7f38-7ba2-8dc3-5f90272d9f1a"
}
}Tags
x402
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