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Academic Citation Verifier
x402
Academic Citation Verifier is a paid API for AI agents from agent-tools-7936.onrender.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-10).
Verifies academic citations by checking DOI or arXiv ID against primary sources and returns a verdict on whether the paper exists, matches the cited metadata, and has not been retracted.
Price / call$0.003
Success—
StatusUnknown
How this service works
Primary-source tools for AI agents: verify before you pay, cite, or repeat.
Output
Returns a JSON object with a 'verdict' field (e.g. VERIFIED, NOT_FOUND, RETRACTED, MISMATCH) and a 'record' object containing the authoritative metadata for the paper — including title, year, and retraction status — as retrieved from primary sources.
Example use cases
Fact-check AI-generated bibliography
“I had an AI write my literature review and I'm worried some citations are hallucinated — can you verify DOI 10.1145/3442188.3445922 and confirm it's a real paper published in 2021?”
Retraction check before submission
“I'm submitting a paper and want to make sure none of my references have been retracted — can you check arXiv ID 1706.03762 and tell me if it's still valid?”
Validate citation by title and authors
“I don't have the DOI for this paper, but I'm citing a work called 'Attention is All You Need' by Vaswani et al. — can you verify it exists and confirm the publication year?”
Technical details
Endpoint
GEThttps://agent-tools-7936.onrender.com/verify/citation?utm_source=zero.xyzWhen to prefer
Choose this endpoint when an AI agent needs to fact-check academic citations before publishing, submitting research, or paying for a citation-based service. Ideal for catching hallucinated DOIs, retracted papers, or metadata mismatches. Prefer this over general web search when you need a structured VERIFIED/RETRACTED verdict from primary sources rather than a best-guess web result.
Side effects
- DOI not found in registry — returns NOT_FOUND verdict
- arXiv ID does not match any paper — returns NOT_FOUND
- Paper exists but cited year or authors do not match — may return MISMATCH
- Network timeout reaching primary source registry
- Missing required query parameters (doi, arxiv, or title) causes 400-level error
- Paper record found but retraction status is indeterminate
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"record": {
"year": 2015,
"title": "Deep learning",
"retracted": false
},
"verdict": "VERIFIED"
}
}Tags
x402
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