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Research Paper Profile by DOI
x402
Research Paper Profile by DOI is a paid API for AI agents from research-papers.x402tookit.com, paid per call via x402, $0.03/call, status unknown (last checked 2026-10-31).
Returns a comprehensive profile for a research paper identified by DOI, including title, journal, year, citation count, field-weighted impact, open-access link, and retraction status.
Price / call$0.03
Success—
StatusUnknown
How this service works
Paper profile by DOI: title, journal, year, citations, field-weighted impact, open-access link and retraction state.
Output
Returns a structured paper profile including: DOI, title, journal name, publisher, publication year, number of authors, first author, cited-by count, references count, field-weighted citation impact score, open-access status and URL, retraction status, topic/field, a brief summary, a quality verdict with reasons, and any checks that were skipped.
Example use cases
Retraction check before citing
“Before I cite this paper in my literature review, can you check DOI 10.1126/science.1103618 and tell me if it's been retracted, corrected, or flagged, and what its current retraction status is?”
Impact assessment for grant writing
“I need the field-weighted citation impact and total citation count for the paper at DOI 10.1016/j.cell.2020.02.052 — I'm putting together a grant application and need to show the paper's influence.”
Finding open access version of a paper
“I don't have journal access — can you look up DOI 10.1056/NEJMoa2001316 and tell me if there's a free open-access version I can read, along with the title and publication year?”
Technical details
Endpoint
GEThttps://research-papers.x402tookit.com/paper-lookup?utm_source=zero.xyzWhen to prefer
Use this endpoint when you have a specific DOI and need a comprehensive single-paper profile covering bibliometrics, impact, open access, and retraction status in one call. Prefer this over separate citation or retraction endpoints when you need multiple data points about one paper simultaneously. Choose this over a topic-search endpoint when you already know the exact DOI.
Side effects
- DOI not found in OpenAlex or Crossref — returns null fields or degraded response
- Malformed or non-existent DOI — may return empty or error response
- Retraction data unavailable for some papers — retractionStatus may be null
- Field-weighted impact not computable for very new or obscure papers
- Open-access link missing even when paper exists — openAccess.isOpen may be false or null
- Service degraded flag set when one data source is unavailable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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