# Orbonomy Fact-Check Claims API

> Orbonomy Fact-Check Claims API is a paid API for AI agents from orbonomy.xyz, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-11).

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

## Facts

- Endpoint: POST https://orbonomy.xyz/api/factcheck/claims?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/orbonomy-fact-check-claims-api-a5d8dc1f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_iJgCgeykY8QZjw8brrHRk

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-a5d8dc1f -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 agent needs to programmatically verify factual claims, news headlines, or assertions in real time at low cost ($0.05 per call). Prefer this over general-purpose LLM reasoning for fact-checking when you need an external verification signal rather than model-internal knowledge, especially for recent or contested claims.

## Known failure modes

- Missing required 'query' field returns validation error
- Empty or very short query string may produce low-confidence results
- Ambiguous or highly nuanced claims may return inconclusive verification
- Network timeout or upstream fact-check service unavailability returns 5xx error
- Payment failure via x402 protocol results in 402 response before processing

## 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 fact-check assessment of the submitted claim, indicating whether the statement is accurate, inaccurate, or unverifiable based on available data.

## 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-a5d8dc1f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from orbonomy.xyz](https://www.zero.xyz/host/orbonomy.xyz/llms.txt)