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x402 Merchant Audit
x402
x402 Merchant Audit is a paid API for AI agents from merchant-audit.clankerceo.workers.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Audits an x402 paid API endpoint before payment by probing liveness, detecting price drift, checking settlement history, and verifying on-chain USDC inflows.
Price / call$0.01
Success—
StatusUnknown
How this service works
Audit any x402 merchant before you pay it. Live probe, price-drift detection, settlement history and on-chain payment verification.
Output
Returns a JSON object with a verdict (e.g. TRUSTED, CAUTION, RISKY), a list of human-readable reasons, and detailed check flags: whether the endpoint is reachable, emits proper 402 responses, has recorded buyers, shows price drift, and the total on-chain USDC inflow over the past 30 days.
Example use cases
Pre-payment safety check
“I'm about to pay an x402 API at https://data-provider.example.com/premium-feed — can you audit it first and tell me if it's safe to pay, whether it actually emits 402 responses, and if there are any on-chain settlements?”
Detect scam or ghost merchant
“This merchant at https://suspicious-api.xyz/paid-service is asking me to pay in USDC via x402 but I've never heard of them. Can you run an audit and tell me if they have any real buyers or settlement history?”
Price drift monitoring before retry
“I paid this x402 endpoint last week at https://ml-api.example.com/inference but I heard the price might have changed — can you audit it now and flag if there's been any price drift before I call it again?”
Technical details
Endpoint
GEThttps://merchant-audit.clankerceo.workers.dev/trust-scoreWhen to prefer
Use this endpoint whenever an AI agent or user is about to make an x402 micropayment and wants to verify the merchant's legitimacy first. It is specifically designed for the x402 HTTP payment protocol ecosystem and provides on-chain verification that generic URL checkers or domain reputation services cannot. Prefer this over manual inspection when you need settlement history, price drift detection, and live liveness checks in a single call.
Side effects
- Target URL unreachable — returns reachable: false with appropriate reason
- Target does not emit 402 responses — emits_402: false in checks
- No on-chain settlement data found — onchain_inflow_usdc: 0
- Invalid or non-HTTPS target URL — likely returns an error or CAUTION verdict
- Network timeout probing the merchant endpoint
- Merchant listed but no activity in 30 days — verdict: CAUTION with reason noting lack of settlements
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"checks": {
"emits_402": true,
"reachable": true,
"has_buyers": false,
"price_drift": false,
"onchain_inflow_usdc": 0
},
"target": "https://example-merchant.com/api/some-service",
"reasons": [
"listed but no settlements in 30d"
],
"verdict": "CAUTION"
}
}Tags
x402
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