# Orbonomy Fact Check Claims API

> Orbonomy Fact Check Claims API is a paid API for AI agents from backup-v2api.orbonomy.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-14).

Submits a text claim or query for automated fact-checking and returns a verification result

## Facts

- Endpoint: POST https://backup-v2api.orbonomy.xyz/api/factcheck/claims
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/orbonomy-fact-check-claims-api-72d6d88e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WIUtox4XRVwaVxszvLpu9

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-72d6d88e -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 you need automated fact-checking of a specific textual claim, statement, or headline at low cost ($0.05 per call) via pay-per-call x402 protocol, especially in workflows that require real-time verification without a subscription

## Known failure modes

- Missing required 'query' field returns validation error
- Empty or very short query string may return low-quality results
- Service unavailability returns HTTP 402 or 5xx if payment or backend fails
- Ambiguous or opinion-based claims may return inconclusive results
- Very long or complex multi-part claims may be mishandled

## How this service works

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

## Output

Returns a JSON object with a success boolean and likely a fact-check verdict or confidence assessment about whether the submitted claim is accurate or false

## 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-72d6d88e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from backup-v2api.orbonomy.xyz](https://www.zero.xyz/host/backup-v2api.orbonomy.xyz/llms.txt)