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Canon Fact-Verification API
x402
Canon Fact-Verification API 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).
Verifies a textual claim using fact-checking and academic research sources, returning a structured verdict
Price / call$0.1
Success—
StatusUnknown
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 field indicating whether the claim was successfully processed and verified; in practice expected to also carry verdict details about whether the claim holds up against academic and factual sources.
Example use cases
Example prompt
“Can you fact-check this claim for me in English: 'The Great Wall of China is visible from space with the naked eye'?”
Technical details
Endpoint
POSThttps://tascanon.orbonomy.xyz/api/verifyWhen to prefer
Use Canon when an AI agent needs to verify specific factual claims against academic and authoritative sources, especially for scientific, historical, or statistical assertions. Prefer this over general web search when you need a structured true/false verdict backed by research rather than a list of links.
Side effects
- Missing required 'claim' field returns validation error
- Missing required 'lang' field returns validation error
- Unsupported language code may result in an error or degraded result
- Payment failure (insufficient USDC) returns HTTP 402
- Ambiguous or overly short claims may yield low-confidence results
- Network timeout for complex multi-source lookups
Input
{
"lang": "en",
"claim": "The Great Wall of China is visible from space with the naked eye"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| langrequired | string | |
| claimrequired | string |
Output
{
"sources": [],
"success": true,
"verdict": "unverified",
"raw_data": {
"wikidata": [],
"factcheck": [],
"wikipedia": null
},
"key_facts": [],
"confidence": 0,
"explanation": "No supporting evidence found in available sources."
}Schema · Response
| Field | Type | Description |
|---|---|---|
| success | boolean |
Tags
x402
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