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Claim Verifier by PDFExtractAPI
x402
Claim Verifier by PDFExtractAPI is a paid API for AI agents from claim-verifier.pdfextractapi.workers.dev, paid per call via x402, $0.04/call, status unknown (last checked 2026-09-14).
Verifies a single factual claim against live web search results and returns a verdict with supporting evidence.
Price / call$0.04
Success—
StatusUnknown
How this service works
Verify a single factual claim against live web search results.
Output
Returns a structured verification result indicating whether the claim is supported, refuted, or unverifiable, along with evidence or citations drawn from live web search results.
Example use cases
Newsroom claim verification
“Before we publish, can you verify this claim: 'Global average temperatures in 2023 were the hottest on record since measurements began' — check it against live web sources and tell me if it holds up?”
Research paper fact-checking
“I'm reviewing a paper that says 'SpaceX has launched more rockets than NASA in the past five years' — can you verify that claim against current web results?”
Social media misinformation check
“Someone posted that 'Drinking coffee reduces the risk of Alzheimer's disease by 65%' — can you fact-check that claim against live sources and tell me if it's supported?”
Technical details
Endpoint
POSThttps://claim-verifier.pdfextractapi.workers.dev/verifyWhen to prefer
Choose this endpoint when you need real-time, web-grounded fact verification for a single discrete claim. It is best suited for spot-checking specific assertions in articles, research, user-generated content, or automated pipelines where truth grounding against live sources matters. Prefer it over static knowledge-base lookups when recency and web evidence are important.
Side effects
- Claim exceeds 500 characters — truncation or rejection error
- Ambiguous claim with no clear web evidence — returned as unverifiable
- Live web search returns no relevant results — inconclusive verdict
- Claim is too niche or recent for indexed web content — low-confidence result
- Malformed request body missing required 'claim' field — 400 validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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