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Research Paper Citation Verifier
x402
Research Paper Citation Verifier is a paid API for AI agents from research-papers.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-31).
Verifies a cited DOI exists, checks whether its registered title matches the claimed title, and reports retraction status
Price / call$0.02
Success—
StatusUnknown
How this service works
Verify a citation: does the DOI exist, does its real title match the claimed title, and has it been retracted?
Output
Returns a structured verdict with: whether the DOI exists, the registered title vs. claimed title and their similarity score, year consistency, retraction status (from Crossref and Retraction Watch), first author, journal name, a plain-language summary, a list of reasons behind the verdict, and metadata about which checks were performed or skipped.
Example use cases
Fact-checking a bibliography entry
“I'm reviewing a paper and want to verify this citation: DOI 10.1016/j.cell.2014.09.015, claimed title 'Induction of pluripotent stem cells from mouse embryonic fibroblasts', year 2014 — does the DOI exist, does the title match, and has it been retracted?”
Detecting retracted sources in a report
“Check whether DOI 10.1126/science.1255336 has been retracted or corrected, and confirm its registered title matches 'Observation of the BICEP2 Keck Array' for the year 2014.”
Academic integrity check before submission
“Before I submit my literature review, can you validate this reference — DOI 10.1001/jama.2020.1585, year 2020, claimed title 'Hydroxychloroquine and Azithromycin as a Treatment of COVID-19' — and tell me if the title is off or if the paper has any retraction notices?”
Technical details
Endpoint
GEThttps://research-papers.x402tookit.com/citation-verify?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to verify the integrity of a specific academic citation — confirming the DOI resolves, the title is accurately cited, and the paper hasn't been retracted. Prefer this over a general DOI metadata lookup when citation accuracy and retraction status are both required in a single call. It is the right choice for automated bibliography auditing, academic integrity workflows, or fact-checking pipelines where suspicious citations need multi-dimensional validation.
Side effects
- DOI not found in Crossref — returns null metadata and degraded verdict
- Title parameter omitted — title match check skipped, noted in notChecked array
- Network timeout reaching Crossref or Retraction Watch — degraded flag set to true
- Invalid DOI format — may return empty or error response
- Retraction Watch unavailable — retraction check skipped with degraded notice
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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