# Canon Claim Comparison & Fact-Checking

> Canon Claim Comparison & Fact-Checking is a paid API for AI agents from aury.orbonomy.xyz, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).

Verifies and compares an array of claims against academic and factual sources, returning a success status with supporting evidence or refutation.

## Facts

- Endpoint: POST https://aury.orbonomy.xyz/api/compare
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/canon-claim-comparison-fact-checking-39f7f070
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gNb8GezwV1fkSheu7TPYP

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 canon-claim-comparison-fact-checking-39f7f070 -d '<json body>'
```

Example prompt: Can you fact-check these three claims for me using Canon: '1) Coffee consumption reduces Alzheimer's risk by 65%, 2) The Amazon rainforest produces 20% of the world's oxygen, 3) Humans use only 10% of their brains'?

## When to prefer this

Use Canon when an AI agent needs to verify factual claims or assertions against academic and research literature, especially when the agent must produce reliable, sourced fact-checks. Prefer this over general web search when academic rigor and citation-backed verification are required.

## Known failure modes

- Empty or malformed claims array returns validation error
- Claims with insufficient specificity may return inconclusive results
- Payment failure via x402/USDC on Base will return 402 Payment Required
- Service unavailability returns 5xx error
- Claims in unsupported languages may not be verifiable

## How this service works

Fact-checking and academic research for AI agents. Verify claims, search papers, explore journals. USDC on Base.

## Output

Returns a JSON object with a boolean 'success' field indicating whether the verification completed, along with results for each claim showing whether it is supported or contradicted by academic or factual sources.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/canon-claim-comparison-fact-checking-39f7f070/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from aury.orbonomy.xyz](https://www.zero.xyz/host/aury.orbonomy.xyz/llms.txt)