{"uid":"cap_W10JkRv2KkSZdHaPyMJKA","slug":"x402-tools-u-3-source-diagnostic-80a21978","name":"x402-tools U-3 Source Diagnostic","description":"Paid x402 diagnostics. Unpaid paid-SKU requests return HTTP 402 with eip3009 extras. Facilitator: OpenX402 only.","url":"https://openclawproductions.com/api/v1/u3src?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"properties":{"type":"string"}}},"responseSchema":{"type":"json","example":{"sku":"u3src","note":"Example paid JSON shape. Not a live settle.","price":"$0.04","title":"U-3 Source"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.04","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":"$0.04/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.04","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.04","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_vEbBL1vxWD7jL4ZyZX1HP","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.04","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 payload for the U-3 Source SKU, gated behind x402 HTTP payment flow with EIP-3009 authorization; unpaid requests receive HTTP 402.","exampleAgentPrompt":"Run the x402 U-3 Source diagnostic on OpenX402 and show me the paid JSON response after settling the $0.04 USDC payment — I want to confirm the EIP-3009 payment gating is working correctly.","exampleUseCases":[{"title":"Verify x402 payment flow end-to-end","prompt":"Test the x402 payment gating on the U-3 Source endpoint and confirm I get back the paid diagnostic JSON after the $0.04 USDC EIP-3009 authorization goes through."},{"title":"Debug HTTP 402 challenge behavior","prompt":"Hit the OpenX402 U-3 Source endpoint without a payment header and show me the full HTTP 402 response with the EIP-3009 extras so I can understand the challenge format."},{"title":"Confirm OpenX402 facilitator integration","prompt":"Ping the U-3 Source SKU through OpenX402 and show me whether my payment authorization is accepted and what the settled diagnostic payload looks like."}],"resultDescription":"Returns a JSON object containing the SKU identifier ('u3src'), a diagnostic note clarifying this is an example paid shape, the price ('$0.04'), and the title ('U-3 Source'). Unpaid or unauthenticated requests return HTTP 402 with EIP-3009 payment challenge extras specifying the required USDC micropayment and facilitator details.","failureModes":["HTTP 402 returned when no valid EIP-3009 payment authorization is included in the request","Payment authorization rejected if wrong facilitator (non-OpenX402) is used","Malformed properties parameter may yield unexpected behavior given minimal schema definition","Network timeout if x402 payment settlement takes too long","Invalid USDC token transfer signature causes payment rejection"],"whenToPreferThis":"Choose this endpoint when you need to test or demonstrate the x402 micropayment protocol with EIP-3009 authorization, specifically with the OpenX402 facilitator. It is purpose-built for diagnosing x402 payment gating behavior — not for production data retrieval. Prefer it over other x402 test endpoints when you specifically need the U-3 Source SKU shape or want to validate OpenX402 facilitator compatibility at a $0.04 USDC price point.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T00:47:16.750Z","isFirstParty":false,"canonicalSlug":"x402-tools-u-3-source-diagnostic-80a21978"}