# Canon Claim Comparison

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

Compares and fact-checks an array of claims against academic and authoritative sources, returning verification results for each claim

## Facts

- Endpoint: POST https://tascanon.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-18d14df4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YZbXd_xL_9Bg1NApklazo

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-18d14df4 -d '<json body>'
```

Example prompt: Can you fact-check these three claims for me against academic sources: 'Coffee reduces Alzheimer's risk', 'The Great Wall of China is visible from space', and 'Vitamin C cures the common cold'?

## When to prefer this

Choose this endpoint when you need to programmatically verify multiple factual claims at once against academic literature — especially useful for AI agents producing content that requires citation-backed accuracy, research assistants cross-referencing findings, or editorial pipelines needing automated fact-checking before publication.

## Known failure modes

- Empty or missing claims array returns validation error
- Claims array with non-string elements may cause parsing failure
- Overly vague or ambiguous claims may yield low-confidence results
- Rate limiting or payment failure (x402) if USDC payment is not properly attached
- Service unavailable if underlying academic data sources are unreachable
- Very niche or highly technical claims may return insufficient evidence findings

## 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 verification results for each submitted claim, indicating whether claims are supported, contradicted, or unverified by 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-claim-comparison-18d14df4/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tascanon.orbonomy.xyz](https://www.zero.xyz/host/tascanon.orbonomy.xyz/llms.txt)