{"service":"x402-ping","title":"x402 ping: cheapest end-to-end test of an x402 payment on Base","description":"Smallest end-to-end test of an x402 client on Base: one call with no required parameters returns server time (ISO 8601 and Unix ms), a request id, the seller payTo, chain id and an echo of your optional text, only after a real settlement. Use this when an agent needs to prove its payment flow works, measure round-trip latency or run a cheap scheduled canary against a live seller. No upstream, no model inference; paid round trip 1 to 2 s (settlement first). Free sample at /api/x402-ping/sample.","price":{"amount":"0.001","token":"USDC","network":"Base"},"input":{"type":"object","additionalProperties":false,"properties":{"echo":{"type":"string","maxLength":200,"description":"Optional text echoed back (up to 200 characters)."}}},"inputExample":{"echo":"hello"},"outputExample":{"ok":true,"serverTime":"2026-10-16T06:29:30.883Z","unixMs":1792132170883,"requestId":"8a10db38-8f01-43ff-ab3e-721d1a068375","echo":"hello","payer":"0xf9D7D09F50d8d216D9a4D6B5ec93b176c10f87e9","seller":{"payTo":"0x6b5aF9924f4CD35643c11a9fd1C983f77261A6E1","chainId":8453,"erc8004AgentId":98748},"policy":"settled only after a successful response; paid round trip 1 to 2 s (verify and settle first)"},"howToPay":"POST JSON to https://tienda.textokit.store/api/x402-ping without payment to receive HTTP 402 with the x402 payment requirements. Repeat the POST with the signed PAYMENT-SIGNATURE header (v2) or X-PAYMENT header (v1) to receive the result."}