{"uid":"cap_HYbbIv3v1oViCp1P2ftBK","slug":"gsc-x402-ai-payment-test-counterparty-dd9457b4","name":"gsc-x402.ai Payment Test Counterparty","description":"GSC's payment door — a real one-cent settlement on Base, signed receipt returned. Prove your agent's payment stack here.","url":"https://gsc-x402.ai/api?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_4Mw9v_OAInv6dPCp0oIIB","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Acts as a live x402 payment test counterparty, allowing developers to validate their payment stack with a real USDC settlement on Base.","exampleAgentPrompt":"Can you run a live end-to-end test of my x402 payment stack by hitting the gsc-x402.ai test counterparty with a real USDC settlement on Base, using a GET request?","exampleUseCases":[{"title":"Pre-production payment stack validation","prompt":"Before I ship my agent to production, I want to confirm that its x402 payment flow actually settles USDC on Base — can you do a live GET call against the gsc-x402.ai test counterparty and show me the settlement result?"},{"title":"Debugging a broken 402 payment middleware","prompt":"My x402 middleware isn't handling payment challenges correctly — can you send a GET request to the gsc-x402.ai endpoint and walk me through what happens with the 402 response and the payment settlement?"},{"title":"CI integration check for x402 agent payments","prompt":"I need to verify that my automated agent can complete a real micropayment via x402 on Base — run a GET against gsc-x402.ai as a smoke test and confirm the payment went through."}],"resultDescription":"A successful HTTP response confirming that the x402 payment challenge was met and a real $0.005 USDC payment was settled on Base, demonstrating that the caller's payment stack is functioning end to end.","failureModes":["Insufficient USDC balance causes payment failure and a 402 response without settlement","Malformed x402 payment header results in rejection","Unsupported HTTP method (e.g. POST) returns an error since only GET, HEAD, DELETE are allowed","Network issues on Base blockchain delay or fail settlement confirmation","Missing or invalid wallet configuration prevents payment from being submitted"],"whenToPreferThis":"Choose this endpoint when you need to validate an x402 payment implementation against a real, live counterparty that actually settles USDC on Base — not a mock or sandbox. It is the right choice for pre-production smoke tests, CI checks, and debugging payment middleware in an environment where a genuine financial transaction is required to confirm correctness.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-27T12:47:36.377Z","isFirstParty":false,"canonicalSlug":"gsc-x402-ai-payment-test-counterparty-dd9457b4"}