# Orbonomy Fact-Check Verify

> Orbonomy Fact-Check Verify is a paid API for AI agents from backup-v2api.orbonomy.xyz, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-13).

Verifies the factual accuracy of a text claim in a specified language, returning a success/result object

## Facts

- Endpoint: POST https://backup-v2api.orbonomy.xyz/api/factcheck/verify
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/orbonomy-fact-check-verify-7d9d3390
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bMHPkq6sjiOwFST4YUHRA

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-verify-7d9d3390 -d '<json body>'
```

Example prompt: Can you fact-check this claim in English: 'The Great Wall of China is visible from space with the naked eye'?

## When to prefer this

Use this endpoint when you need a pay-per-call, programmatic fact-checking service that accepts a plain-text claim and a language specifier, and returns a machine-readable verification result. Prefer this over general LLM reasoning for situations where an external, dedicated fact-checking pipeline is desired, especially when operating via the x402 micropayment protocol.

## Known failure modes

- Missing required 'claim' field returns 400 error
- Missing required 'lang' field returns 400 error
- Payment not provided or insufficient triggers 402 Payment Required
- Unsupported language code may return an error or unexpected result
- Very ambiguous or nonsensical claims may return low-confidence or inconclusive results
- Service downtime returns 5xx error

## 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 indicating whether the verification request was processed, along with (implied) fact-check results such as whether the claim is true, false, or unverifiable.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "lang",
  "claim"
 ],
 "properties": {
  "lang": {
   "type": "string"
  },
  "claim": {
   "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-verify-7d9d3390/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)