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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 safety before payment, returning reachability, price-drift, settlement history, and on-chain verification.
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, SAFE, SCAM), a list of human-readable reasons, and detailed check flags including: whether the endpoint emits HTTP 402, is reachable, has real buyers, shows price drift, and total on-chain USDC inflow over the past 30 days.
Example use cases
Scam check before agent pays API
“I want to use this paid API at https://cool-agent-tool.xyz/api/v1/generate but I'm not sure if it's legit — can you audit it and tell me if it's safe to pay?”
Price drift detection on recurring API
“My agent has been paying https://data-provider.io/feed/prices every day — can you check if the price has drifted recently or if anything looks off before I keep using it?”
Verify on-chain settlement history
“I'm evaluating https://inference-api.net/v1/complete as a paid API — can you check its on-chain USDC inflows and tell me if real buyers have actually settled payments with it?”
Technical details
Endpoint
GEThttps://merchant-audit.clankerceo.workers.dev/scam-checkWhen to prefer
Use this endpoint when an AI agent is about to spend money on an x402-gated API and needs to verify safety first. Ideal for pre-payment due diligence, fraud prevention in autonomous agent pipelines, or evaluating new x402 merchants before integration. Prefer this over generic uptime checks or blockchain explorers when you need a consolidated, x402-specific audit combining live probing, price history, and on-chain settlement data in a single call.
Side effects
- Target URL is not reachable — reachable flag returns false, verdict may be CAUTION or SCAM
- Target does not emit 402 — emits_402 flag is false, likely not a valid x402 endpoint
- No settlement history found — has_buyers false, onchain_inflow_usdc is 0
- Price drift detected — price_drift flag true, verdict elevated to CAUTION
- Invalid or missing target query parameter — returns 400 or error response
- Target URL is malformed or not HTTPS — request rejected
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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