{"uid":"cap_bZnKhf7uFwnPW0YGUn1up","slug":"mercer-x402-ping-hub-probe-a98dac33","name":"Mercer x402 Ping (Hub Probe)","description":"Settlement canary: returns a timestamped pong JSON after USDC micropayment. Use to verify x402 client + wallet + facilitator end-to-end.","url":"https://x402.lucidcove.org/v1/ping","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","required":[],"properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm__znh-j6RizBOFBJo9ssAb","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a timestamped pong JSON after a $0.001 USDC micropayment, serving as an end-to-end connectivity and settlement canary for x402 clients.","exampleAgentPrompt":"Send a $0.001 USDC ping through my x402 client to confirm the full payment and settlement flow is working end-to-end — I need to see a timestamped pong back.","exampleUseCases":[{"title":"x402 integration smoke test","prompt":"I just set up my x402 wallet and facilitator — can you fire a quick ping to verify the whole micropayment flow actually works and show me the timestamped pong you get back?"},{"title":"Agent fleet payment health check","prompt":"Before deploying my agent fleet, I want to confirm each agent's x402 USDC payment stack is functional — run a settlement canary ping and show me the timestamp so I know it settled correctly."},{"title":"Debugging a broken x402 setup","prompt":"My x402 client stopped working after I rotated my wallet keys — can you send a test ping through it so we can see whether it successfully pays and gets a pong, or where it fails?"}],"resultDescription":"A small JSON object containing a 'pong' acknowledgment and a server-side timestamp, confirming that the x402 payment was received and settled, and that the full client-wallet-facilitator pipeline completed successfully.","failureModes":["Payment not included or malformed x402 header — server returns 402 Payment Required","Insufficient USDC balance — payment rejected before a pong is returned","Wrong facilitator endpoint configured — request never reaches the server","Network timeout — no response, indicating connectivity issue downstream","Invalid wallet credentials — payment authorization fails silently or with a 401/403"],"whenToPreferThis":"Use this endpoint specifically when you need to verify that an x402 micropayment stack (client, wallet, and facilitator) is wired together correctly end-to-end. It is purpose-built as a cheap ($0.001 USDC) settlement canary, making it ideal for smoke tests, CI/CD health checks, and debugging payment pipeline issues before invoking more expensive x402-enabled services.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:38:08.044Z","isFirstParty":false}