# whatchuneed Fact Check Search

> whatchuneed Fact Check Search 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).

Searches for and fact-checks claims by querying relevant sources and returning a verification result

## Facts

- Endpoint: POST https://whatchuneed.vercel.app/api/factcheck/search
- 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-search-b9d97407
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_wi0h9wVzUht4ObgwNqlRF

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-search-b9d97407 -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' — search for evidence and tell me if it's accurate?

## When to prefer this

Choose this endpoint when you need a quick, pay-per-call fact-checking search without committing to a subscription service. Ideal for agents that occasionally need to verify claims, check misinformation, or validate statements as part of a broader workflow, especially when integrated into an x402 payment pipeline.

## Known failure modes

- Empty or ambiguous input string may return inconclusive results
- Complex or highly niche claims may lack sufficient indexed sources to verify
- Rate limiting or payment failure (402) if USDC payment is not properly attached
- Overly long input strings may be truncated or rejected
- Non-English claims may have reduced accuracy due to limited source coverage

## 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 result object containing the fact-check outcome and a status string. The result typically includes verdict information, relevant sources, or evidence gathered during the search to support or refute the queried claim.

## 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-search-b9d97407/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)