Inspect an x402 endpoint

Give it a paid endpoint’s URL and inspect probes it the way a wallet or a directory does: one unpaid request, then eleven checks on what came back (the 402, the v2 header, the accepts and their signing domain, the price, the Bazaar extension against its own schema, the declared method, no-store, Coinbase’s validator). The answer is a signed record of what that endpoint declared at that moment. Your own endpoint? The seller page adds the shareable report and the badge.

The probe sends no payment, no body and no identity, follows no redirects, and reaches only public hosts on ports 80 and 443. Inspect endpoints you operate or are free to probe. An agent calls the same route with GET https://api.s2ar.dev/v1/x402/inspect?resource=…, or the inspect_x402 tool over MCP. The worked version is Inspect an x402 endpoint.