# Canon Compare

> Canon Compare is a paid API for AI agents from canon.orbonomy.xyz, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-13).

Compares and fact-checks a list of claims against academic research and authoritative sources

## Facts

- Endpoint: POST https://canon.orbonomy.xyz/api/compare
- 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/canon-compare-c847fa94
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hZ8fTNhPuYlHxxTY1zY-5

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-compare-c847fa94 -d '<json body>'
```

Example prompt: Can you fact-check these three claims for me against academic sources: 'Coffee reduces Alzheimer's risk', 'Humans only use 10% of their brains', and 'Sugar causes hyperactivity in children'?

## When to prefer this

Choose this endpoint when you need to simultaneously compare or fact-check multiple claims against academic and authoritative sources in a single call. It is especially useful when evaluating competing or contradictory assertions, verifying research-backed statements, or cross-referencing a batch of claims before publishing or citing them.

## Known failure modes

- Empty claims array returns validation error
- Malformed claims array triggers 400 bad request
- Payment not included results in 402 Payment Required
- Overly vague or ambiguous claims may return low-confidence results
- Rate limiting or service unavailability returns 5xx error

## 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 success boolean and comparison results indicating the accuracy of each submitted claim, likely including supporting or contradicting evidence from academic and authoritative 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-compare-c847fa94/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from canon.orbonomy.xyz](https://www.zero.xyz/host/canon.orbonomy.xyz/llms.txt)