# Canon Claim Comparator

> Canon Claim Comparator is a paid API for AI agents from vert.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 verified sources, returning verification results for each claim

## Facts

- Endpoint: POST https://vert.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-comparator-e1d96dff
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZigjANv5iW4Dyn7oJSo_G

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-comparator-e1d96dff -d '<json body>'
```

Example prompt: Can you fact-check these three claims for me: 'Vitamin C cures the common cold', 'The Great Wall of China is visible from space', and 'Humans only use 10% of their brain'?

## When to prefer this

Choose this endpoint when you need to verify factual accuracy of specific claims against academic literature and credible sources. Ideal for AI agents that must validate research assertions, debunk misinformation, or cross-check facts before presenting information to users. Prefer this over general web search when academic rigor and structured verification output are required.

## Known failure modes

- Empty or missing claims array returns validation error
- Malformed claims input may cause processing failure
- Payment failure (insufficient USDC) results in 402 response
- Overly vague or unverifiable claims may yield low-confidence results
- Network timeout for large claims arrays

## How this service works

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

## Output

A JSON object with a success boolean and verification results for each submitted claim, indicating whether the claims are supported, refuted, or unverified based on academic and 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-comparator-e1d96dff/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from vert.orbonomy.xyz](https://www.zero.xyz/host/vert.orbonomy.xyz/llms.txt)