Test an x402 seller before agents depend on it
Returning HTTP 402 is only the start. Buyers also need coherent payment requirements, stable retry URLs, clear pricing, discovery, and safe failure behavior. The seller audit checks those integration surfaces together.
This live audit is free and does not request or authorize payment.
Who it is for
Useful for x402 API sellers, payment facilitators, agent marketplaces, and buyer-runtime teams reviewing a new paid endpoint.
What the result contains
The response contains a seller-practice scorecard, evidence, prioritized findings, and remediation guidance. The audit does not authorize or perform a purchase of the target endpoint.
What MilliAPI checks
- payment challenge structure and advertised protocol
- price, network, asset, and retry clarity
- seller discovery and agent-facing documentation
- integration findings separated from settlement execution
Representative result
Fields vary with the target and live evidence; this abbreviated example shows the response shape, not a promised score.
{"seller":"api.example.com","challenge":"valid","retrySafe":true,"findings":["publish x402 discovery"]}Current price: free, derived from MilliAPI’s product manifest.