{"uid":"cap_Qn8svYPK143LqOf8jiyfu","slug":"curb-discovery-probe-x402-usdc-on-base-0ba5112b","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_mrerora1_ef4aa28e/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_TTLA8a8ESL4pSkAXWlTq1","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 validates x402 USDC micropayment flow on Base, returning a confirmation response upon successful payment","exampleAgentPrompt":"Send a discovery probe to the CURB x402 endpoint on Base — pay the $0.10 USDC fee and include the note 'testing integration' to confirm the payment flow works end to end.","exampleUseCases":null,"resultDescription":"Upon successful USDC payment via x402 on Base, the endpoint returns a probe confirmation response for the specified match ID, validating that the micropayment pipeline is operational.","failureModes":["Payment not received or insufficient USDC balance — 402 Payment Required returned","Invalid x402 payment header format — 400 Bad Request","Base network congestion causing payment timeout","Match ID not found — 404 Not Found","Duplicate payment attempt rejected — idempotency violation"],"whenToPreferThis":"Use this endpoint when you need to verify that an x402 USDC micropayment integration on Base is functioning correctly, or when discovering and probing CURB API capabilities via a low-cost ($0.10) test transaction. Prefer this over free probes when you need to confirm the full paid payment flow end to end.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T00:35:37.319Z","isFirstParty":false}