# Veritas Fact Check API

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

Verifies factual claims against multiple sources and returns a structured list of verified or disputed claims

## Facts

- Endpoint: POST https://veritas.orbonomy.xyz/api/factcheck
- 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/veritas-fact-check-api-c11c1ddf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5skIE1qsa6r5elCd1zuxi

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 veritas-fact-check-api-c11c1ddf -d '<json body>'
```

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

## When to prefer this

Use this endpoint when you need multi-source fact verification of a specific textual claim or statement, especially when accuracy and cross-referencing matter. Prefer this over single-source lookup or general search when the goal is explicitly to confirm or refute a factual assertion.

## Known failure modes

- Missing required 'query' field returns validation error
- Empty or very short query may yield low-confidence or empty claims array
- Ambiguous queries may return multiple conflicting claims
- Service unavailable or timeout results in non-success response
- Highly niche or very recent claims may have insufficient source coverage

## How this service works

Multi-source fact verification API

## Output

Returns a JSON object with a success boolean and a claims array, where each claim entry describes the verification status and supporting evidence found across multiple sources for the queried statement.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "success"
 ],
 "properties": {
  "claims": {
   "type": "array"
  },
  "success": {
   "type": "boolean"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/veritas-fact-check-api-c11c1ddf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from veritas.orbonomy.xyz](https://www.zero.xyz/host/veritas.orbonomy.xyz/llms.txt)