# WhatChUNeed Fact Check Claims

> WhatChUNeed Fact Check Claims is a paid API for AI agents from whatchuneed.vercel.app, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Verifies factual claims in a given text, returning a structured fact-check result indicating accuracy and supporting context

## Facts

- Endpoint: POST https://whatchuneed.vercel.app/api/factcheck/claims
- 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/whatchuneed-fact-check-claims-1e0933ac
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hGfCKDgOhu79wfVDXhDbx

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 whatchuneed-fact-check-claims-1e0933ac -d '<json body>'
```

Example prompt: Can you fact-check this claim for me: 'The Great Wall of China is visible from space with the naked eye' — I want to know if it's true or false and why.

## When to prefer this

Use this endpoint when an agent needs to programmatically verify factual claims, news headlines, statistics, or quotes at $0.05 per call via x402 crypto micropayment — ideal for pipelines that need automated fact-checking without managing a dedicated misinformation API subscription.

## Known failure modes

- Empty or missing input string returns validation error
- Ambiguous or opinion-based claims may return inconclusive verdicts
- Claims about very recent events may lack sufficient data for verification
- Overly long input text may be truncated or rejected
- Network or payment failures return non-200 status

## How this service works

320+ pay-per-call API endpoints across accommodation, LLM, code execution, crypto, medical, finance, and more. One API, one payment. Powered by x402 protocol.

## Output

A structured JSON object containing a result field with the fact-check outcome (verdict, supporting evidence, accuracy assessment) and a status field indicating success or failure of the request.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "string",
   "description": "Request input"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "result": {
   "type": "object",
   "description": "Response data"
  },
  "status": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/whatchuneed-fact-check-claims-1e0933ac/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from whatchuneed.vercel.app](https://www.zero.xyz/host/whatchuneed.vercel.app/llms.txt)