# Web Content Verification API

> Web Content Verification API is a paid API for AI agents from ouhue-37-255-229-96.run.pinggy-free.link, paid per call via x402, $0.25/call, status unknown (last checked 2026-10-20).

Verifies a URL's content and optionally tests a specific claim against the page's content, returning cross-references and support status

## Facts

- Endpoint: POST https://ouhue-37-255-229-96.run.pinggy-free.link/verify?utm_source=zero.xyz
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/web-content-verification-api-ad07d891
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_3XzG1gAhxkzEzEp9fO528

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 web-content-verification-api-ad07d891 -d '<json body>'
```

Example prompt: Can you verify whether this page — https://example.com/article — actually supports the claim that 'electric vehicles reduce CO2 emissions by 50% compared to gasoline cars'?

## When to prefer this

Use this endpoint when you need to programmatically verify whether a specific URL's content supports or contradicts a particular claim, especially for fact-checking, citation validation, or content auditing workflows. It is distinct from general web scraping because it returns structured cross-reference evidence and an explicit support verdict tied to a claim.

## Known failure modes

- URL is unreachable or returns a non-200 status — endpoint may return an error or empty cross-references
- Paywalled or JavaScript-heavy pages may not render properly, resulting in incomplete content analysis
- Ambiguous or very broad claims may return low-confidence or inconclusive support status
- Invalid URL format in the request body causes a validation error
- Rate limiting or network timeouts from the target website may cause verification failure

## How this service works

Website hosted for free through pinggy.io&gt;
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## Output

Returns a JSON object containing the original URL, a support status string indicating whether the page supports the claim, an array of cross-reference objects with corroborating or contradicting evidence found on the page, and a payment receipt object confirming the transaction.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "url"
 ],
 "properties": {
  "url": {
   "type": "string"
  },
  "claim": {
   "type": "string",
   "description": "optional claim to test against page content"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "url"
 ],
 "properties": {
  "url": {
   "type": "string"
  },
  "receipt": {
   "type": "object"
  },
  "supported": {
   "type": "string"
  },
  "crossReferences": {
   "type": "array",
   "items": {
    "type": "object"
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/web-content-verification-api-ad07d891/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ouhue-37-255-229-96.run.pinggy-free.link](https://www.zero.xyz/host/ouhue-37-255-229-96.run.pinggy-free.link/llms.txt)