# Cerawal Claim Verifier

> Cerawal Claim Verifier is a paid API for AI agents from cerawal.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Verifies a textual claim by searching the web and cross-referencing multiple sources, returning a structured result with source-backed evidence

## Facts

- Endpoint: POST https://cerawal.vercel.app/api/verify
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/cerawal-claim-verifier-20b98143
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MXc7FOlNHN_fBsJg475KG

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 cerawal-claim-verifier-20b98143 -d '<json body>'
```

Example prompt: Can you verify the claim 'Elon Musk is the richest person in the world as of 2024' using 5 sources and tell me if it checks out?

## When to prefer this

Use this endpoint when an AI agent needs to programmatically fact-check a specific textual claim against live web sources without requiring an API key or subscription — ideal for lightweight, pay-per-use verification tasks where the claim can be expressed as a single string.

## Known failure modes

- Missing required 'claim' field returns a validation error
- Claim is too vague or ambiguous for web sources to resolve, resulting in inconclusive data
- Insufficient web sources found for the given claim topic
- Payment not completed via x402 results in 402 Payment Required response
- Network or scraping failure may return success: false with error details in data

## 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 verification results — likely including whether the claim is supported, and evidence or source summaries gathered from the web.

## 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/cerawal-claim-verifier-20b98143/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from cerawal.vercel.app](https://www.zero.xyz/host/cerawal.vercel.app/llms.txt)