# Cravvol Claim Verification

> Cravvol Claim Verification is a paid API for AI agents from cravvol.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-13).

Verifies a factual claim by searching and crawling the web, returning a verdict with supporting sources

## Facts

- Endpoint: POST https://cravvol.vercel.app/api/verify
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cravvol-claim-verification-343e5330
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DHdJtfylsc4qSnnlxQ1iV

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability cravvol-claim-verification-343e5330 -d '<json body>'
```

Example prompt: Can you verify this claim using 5 sources: 'The Eiffel Tower is taller than the Statue of Liberty'?

## When to prefer this

Use this endpoint when an AI agent needs to programmatically fact-check or verify a specific textual claim against live web sources without requiring API keys or subscriptions. Ideal for autonomous agents that need pay-per-use, no-auth fact verification in USDC via x402.

## Known failure modes

- Claim string missing — returns 400 validation error
- Insufficient web sources available for obscure or highly specific claims
- Payment not sent or invalid USDC amount — returns 402 payment required
- Ambiguous claim yields inconclusive result with low confidence
- Rate limiting or upstream scraping blocks reduce source count

## How this service works

Web scraping and search for AI agents. No auth, no subscriptions. Pay per request in USDC via x402.

## Output

Returns a JSON object with a success boolean and a data object containing the verification result and supporting evidence gathered from crawled web sources

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "claim"
 ],
 "properties": {
  "claim": {
   "type": "string",
   "description": "Claim to verify"
  },
  "sources": {
   "type": "number",
   "description": "Number of sources"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "data": {
   "type": "object"
  },
  "success": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/cravvol-claim-verification-343e5330/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cravvol.vercel.app](https://www.zero.xyz/host/cravvol.vercel.app/llms.txt)