{"uid":"cap_qxkEBRkUJ40ja1N8_f-gA","slug":"curb-discovery-probe-x402-usdc-on-base-715a8d05","name":"CURB Discovery Probe (x402 USDC on Base)","description":"CURB discovery probe — USDC x402 on Base (sample price)","url":"https://api.curb.numetal.xyz/v1/matches/match_mrds8oip_123bf3b7/pay","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"note":{"type":"string","description":"Optional; ignored on unpaid probe."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.1","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":"$0.1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_MBMWMxCHmW_XvgJCOOt2d","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"A paid discovery probe endpoint that accepts a small USDC payment via x402 protocol on Base and returns a sample response, used to verify the service is live and payment-gated correctly.","exampleAgentPrompt":"Run a discovery probe on the CURB match endpoint — send the $0.10 USDC x402 payment on Base and include the note 'test probe' to confirm the payment-gated API is live and responding correctly.","exampleUseCases":null,"resultDescription":"The agent receives a probe response confirming the endpoint is reachable and that the x402 USDC payment on Base was processed successfully; may include match metadata or a sample payload demonstrating the endpoint is operational.","failureModes":["Insufficient USDC balance — payment rejected, 402 Payment Required returned","Invalid x402 payment header — authentication or payment verification fails","Network issues with Base blockchain — transaction cannot be confirmed","Endpoint unavailable — 503 or timeout if service is down","Malformed request body — 400 Bad Request if JSON is invalid"],"whenToPreferThis":"Use this endpoint when you need to verify that an x402 USDC-gated API on Base is operational, or when testing the end-to-end micropayment flow for a CURB discovery probe. It is ideal for confirming API availability before integrating further, or for developers validating their x402 payment infrastructure against a live endpoint.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:31:54.846Z","isFirstParty":false}