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Claim Verification via Web Search
x402
Claim Verification via Web Search is a paid API for AI agents from cr4vvol.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Verifies a textual claim by searching and scraping the web, returning a structured result indicating whether the claim is supported
Price / call$0.05
Success—
StatusUnknown
How this service works
Web scraping and search for AI agents. No auth, no subscriptions. Pay per request in USDC via x402.
Output
A JSON object with a 'success' boolean indicating if the verification completed, and a 'data' object containing structured results from the web search — likely including source evidence and a verdict on whether the claim is supported.
Example use cases
Example prompt
“Can you fact-check this claim for me using 5 sources: 'Electric vehicles account for more than 20% of all new car sales globally in 2024'?”
Technical details
Endpoint
POSThttps://cr4vvol.vercel.app/api/verifyWhen to prefer
Use this endpoint when you need to fact-check or verify a specific textual claim against real web sources, paid per-request with no subscription. Prefer this over generic search APIs when you specifically need a structured verification verdict rather than raw search results.
Side effects
- Claim too vague or ambiguous to search effectively — returns low-confidence or empty data
- Requested number of sources unavailable — may return fewer sources than requested
- Payment failure via x402 — request blocked before processing
- Web scraping blocked by target sites — incomplete evidence gathered
- Network timeout on external web requests — success: false returned
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| claimrequired | string | Claim to verify |
| sources | number | Number of sources |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| data | object | |
| success | boolean |
Tags
x402
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