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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 2026-09-15).
Audits an x402 paid API endpoint for reachability, price integrity, settlement history, and on-chain payment verification before you pay it.
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. CAUTION, OK, UNSAFE), individual check results (reachable, emits_402, has_buyers, price_drift, onchain_inflow_usdc), the audited target URL, and a list of human-readable reasons explaining the verdict.
Example use cases
Pre-payment safety check
“I'm about to pay this x402 API at https://weather-api.example.com/forecast — can you audit it first to make sure it's legit, has real buyers, and the price hasn't drifted?”
Vetting a new data provider
“We're considering integrating https://data-provider.xyz/api/records into our pipeline, but it charges per call via x402. Can you run an audit on it and tell me if it has on-chain settlement history and whether it actually responds with a 402?”
Investigating a suspicious paid endpoint
“I found a listing for https://sketchy-merchant.io/premium-data but I'm not sure it's real — audit it and tell me the verdict: does it emit 402, has it had any buyers in the last 30 days, and how much USDC has flowed to it on-chain?”
Technical details
Endpoint
GEThttps://merchant-audit.clankerceo.workers.dev/merchant-auditWhen to prefer
Use this endpoint when an AI agent or user is about to make an x402 micropayment and needs to verify the target merchant's legitimacy, activity, and pricing integrity before spending USDC. It is the right choice when you need a pre-payment due-diligence check specific to the x402 protocol, combining live probing, on-chain data, and settlement history in a single call.
Side effects
- Target URL is unreachable — reachable flag returns false
- Target does not emit HTTP 402 — emits_402 returns false, verdict likely CAUTION or UNSAFE
- No on-chain settlement history found — onchain_inflow_usdc is 0 and has_buyers is false
- Price drift detected — price_drift flag is true, indicating inconsistent pricing
- Invalid or malformed target URL — request may fail or return an error
- Endpoint itself is unavailable (Cloudflare Worker downtime)
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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