{"uid":"cap_-v5q5Elz28WANhecZZD8S","slug":"spendthebits-x402-proof-of-life-heartbeat-321b8cfa","name":"SpendTheBits x402 Proof-of-Life Heartbeat","description":"Official $0.01 proof-of-life resource for SpendTheBits x402: returns a JSON heartbeat. Pay it to verify your agent's x402 client end to end.","url":"https://x402.spendthebits.com/@superappstb/proof/?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string"},"method":{"type":"string"},"queryParams":{"type":"object"}}},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"}}}}},"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_gcmLGcCJYJyHpYtiz4LvR","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":"Returns a JSON heartbeat for $0.01 USDC to verify an agent's x402 payment client is working end-to-end.","exampleAgentPrompt":"Make a $0.01 proof-of-life payment to the SpendTheBits x402 heartbeat endpoint so I can confirm my x402 payment client is wired up correctly end to end.","exampleUseCases":[{"title":"Pre-launch x402 integration check","prompt":"Before I go live, ping the SpendTheBits proof-of-life endpoint with $0.01 to confirm my agent's x402 payment client can successfully complete a real payment flow."},{"title":"CI pipeline x402 smoke test","prompt":"Run a quick $0.01 heartbeat call to SpendTheBits x402 so my deployment pipeline can verify the payment integration is still working after the latest code push."},{"title":"Debugging a broken x402 client","prompt":"I think my x402 client is misconfigured — can you make a $0.01 test payment to the SpendTheBits proof-of-life endpoint and tell me if it goes through?"}],"resultDescription":"A JSON heartbeat object confirming the x402 payment was accepted and the service is alive; serves as proof that the agent's x402 payment client completed a real end-to-end payment transaction successfully.","failureModes":["Payment rejected if x402 client is misconfigured or missing payment header","Insufficient funds in agent wallet causes payment failure","Network timeout or connectivity issue to x402.spendthebits.com","Invalid x402 protocol version mismatch","Rate limiting or server-side errors returning non-200 status"],"whenToPreferThis":"Use this endpoint specifically when you need to verify that an x402 payment client is correctly configured and capable of completing a real micropayment transaction. It is purpose-built as a cheap ($0.01) end-to-end integration test for x402 flows — not for testing general HTTP connectivity or non-payment API integrations.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T06:38:13.768Z","isFirstParty":false,"canonicalSlug":"spendthebits-x402-proof-of-life-heartbeat-488a1410"}