# Orbonomy Fact Check Claims API

> Orbonomy Fact Check Claims API is a paid API for AI agents from api.orbonomy.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).

Verifies factual claims in a query string and returns a fact-check result

## Facts

- Endpoint: POST https://api.orbonomy.xyz/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/orbonomy-fact-check-claims-api-91f922b3
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_K-QqmVPozyVVIiGCyxX7X

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 orbonomy-fact-check-claims-api-91f922b3 -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'?

## When to prefer this

Use this endpoint when an AI agent needs to verify the factual accuracy of a specific claim, headline, or statement in real time. It is well-suited for journalism, content moderation, or any workflow where detecting misinformation or confirming facts is required. At $0.05 USDC per call via x402, it is appropriate for per-claim spot checks rather than bulk document analysis.

## Known failure modes

- Missing required 'query' field returns a validation error
- Empty or very short query may return low-quality results
- Ambiguous or extremely complex claims may not yield a definitive verdict
- Network or upstream service failure returns a non-success response
- Rate limiting or payment failure via x402 protocol blocks the request

## How this service works

50+ pay-per-call API endpoints across accommodation, AI, content, fact-checking, and data services. Powered by x402 protocol.

## Output

A JSON object with a success boolean indicating whether the fact-check completed, along with the fact-check assessment of the submitted claim.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "query"
 ],
 "properties": {
  "query": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "success": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/orbonomy-fact-check-claims-api-91f922b3/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.orbonomy.xyz](https://www.zero.xyz/host/api.orbonomy.xyz/llms.txt)