{"uid":"cap_kXeBt3ksTowYTNmOvRYBT","slug":"x402-tools-stub-cold-41-diagnostic-endpoint-59145498","name":"x402-tools Stub Cold 41 Diagnostic Endpoint","description":"Paid x402 diagnostics. Unpaid paid-SKU requests return HTTP 402 with eip3009 extras. Facilitator: OpenX402 only.","url":"https://openclawproductions.com/api/v1/stubcold41?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"sku":"stubcold41","note":"Example paid JSON shape. Not a live settle.","price":"$0.02","title":"Stub Cold 41"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_rMYRhsqicTNJt4hfRTHtd","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a paid diagnostic JSON stub (SKU stubcold41) via the x402 micropayment protocol, demonstrating HTTP 402 payment-gated API access with eip3009 authorization.","exampleAgentPrompt":"Run the x402 stub cold 41 diagnostic check so I can confirm that my HTTP 402 payment flow and eip3009 authorization are working correctly with the OpenX402 facilitator.","exampleUseCases":[{"title":"Verifying x402 payment integration","prompt":"Can you hit the stubcold41 x402 diagnostic endpoint and confirm I get back the paid JSON stub — I want to make sure my eip3009 payment authorization is going through correctly with OpenX402."},{"title":"Debugging HTTP 402 payment wall behavior","prompt":"I need to test what happens when I send an unpaid request to an x402-gated endpoint — can you call the stub cold 41 diagnostic and show me the 402 response with the eip3009 extras so I can see the payment challenge structure?"},{"title":"Confirming USDC micropayment flow end-to-end","prompt":"Walk me through a live $0.02 USDC micropayment on the stubcold41 x402 diagnostic endpoint and show me the response I get back once the payment clears through the OpenX402 facilitator."}],"resultDescription":"Returns a JSON object containing the SKU identifier ('stubcold41'), a diagnostic note confirming the paid response shape, the price ('$0.02'), and a human-readable title ('Stub Cold 41'). Unpaid requests instead receive HTTP 402 with eip3009 payment challenge extras indicating the required payment details.","failureModes":["HTTP 402 returned when no valid x402 payment header is included — response body contains eip3009 payment challenge extras","Payment processed by a facilitator other than OpenX402 may be rejected","Invalid or malformed eip3009 authorization results in payment failure","Network timeout or server unavailability returns 5xx error","Incorrect properties parameter format may result in 400 bad request"],"whenToPreferThis":"Choose this endpoint when you need to test, debug, or demonstrate an x402 HTTP 402 micropayment flow using the OpenX402 facilitator and eip3009 authorization specifically. It is ideal for developers integrating x402 payment-gating into their own APIs who want a safe, low-cost ($0.02 USDC) stub to validate their client-side payment logic without hitting a production endpoint.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T18:41:55.233Z","isFirstParty":false,"canonicalSlug":"x402-tools-stub-cold-41-diagnostic-endpoint-59145498"}