# Whatchuneed Fact-Check Summary

> Whatchuneed Fact-Check Summary 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).

Takes a claim or text as input and returns a fact-check summary indicating its accuracy and supporting evidence.

## Facts

- Endpoint: POST https://whatchuneed.vercel.app/api/factcheck/summary
- 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-summary-2be330f3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_TDf6cFjqyTyndQ1kAaBrW

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-summary-2be330f3 -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' — give me a summary of whether it's true or false and why.

## When to prefer this

Choose this endpoint when you need a quick, automated fact-check summary for a specific claim, statement, or headline without needing to manually search for sources. It is well-suited for AI agents that need to validate user-supplied content, filter misinformation in pipelines, or provide fast accuracy assessments as part of a broader workflow. Prefer this over general-purpose search when you specifically need a pass/fail or true/false-style verdict with a summary explanation.

## Known failure modes

- Missing or empty 'input' field returns validation error
- Ambiguous or very short claims may return low-confidence summaries
- Claims about very recent events may lack sufficient evidence for verification
- Highly technical or niche claims may produce incomplete analysis
- API returns generic error if the x402 payment is not processed correctly

## 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

Returns a structured result object containing a fact-check summary with a verification status and supporting analysis of the input claim, indicating whether the statement is accurate, inaccurate, misleading, or unverifiable.

## 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-summary-2be330f3/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)