x402 security audit
Grade any x402 seller's payment-security posture from the outside - a read-only black-box check mapped to the 'Five Attacks on x402' failure modes. Probes the URL's 402 challenge (never pays) and scores TLS transport, gated-response cache h
Go to this service →Our latest check (2026-10-11)
- Answering
- Yes — valid x402 payment terms
- Time to answer
- 206 ms
- Price
- $0.010 per call
- Paying buyers, last 30 days
- 5 (directory's own records)
- Paid calls, last 30 days
- 7
- Category
- Payments and on-ramps
- Address
- https://agent402.tools/api/x402-audit
Accuracy: paid answers checked against an independent record
Not yet in our paid checks. A seller we have not checked has neither passed nor failed.
For agents
This page as JSON: /sellers/af712a254f54.json. Paid lookup by address: GET /api/seller?resource=… ($0.001, x402).