{"uid":"cap_t1ceDDSpl6IoW8XBTIZT8","slug":"x402-radar-conformance-probe-e66068ea","name":"x402 Radar Conformance Probe","description":"Live x402 conformance probe: url=<endpoint>, returns whether it serves a valid 402 handshake, actual price/asset/network/payTo, latency. Verify before you pay. By x402 Radar.","url":"https://configure-flip-childhood-widely.trycloudflare.com/api/check","method":"POST","headers":{},"bodySchema":null,"responseSchema":{"type":"object","example":{"x402":true,"alive":true,"scheme":"exact","status":402,"checked":"https://api.exa.ai/search","network":"base","latency_ms":340,"valid_handshake":true,"price_usd_if_usdc":0.007},"properties":{"at":{"type":"string"},"x402":{"type":"boolean"},"alive":{"type":"boolean"},"asset":{"type":"string"},"payTo":{"type":"string"},"scheme":{"type":"string"},"status":{"type":"number"},"checked":{"type":"string"},"network":{"type":"string"},"latency_ms":{"type":"number"},"price_atomic":{"type":"string"},"x402_version":{"type":"number"},"valid_handshake":{"type":"boolean"},"price_usd_if_usdc":{"type":"number"}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Sfm2u-7gs72k6HgqIK-ix","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Checks whether a given URL serves a valid x402 payment handshake and returns its price, asset, network, payTo address, and latency.","exampleAgentPrompt":"Before I pay, can you probe https://api.exa.ai/search and tell me if it actually serves a valid x402 handshake, what the price is in USDC, which network it's on, and how fast it responds?","exampleUseCases":[{"title":"Pre-payment x402 endpoint verification","prompt":"Can you check https://api.someservice.com/data before I integrate it — does it have a valid x402 handshake, what's the price, and which blockchain network does it use?"},{"title":"Detecting misconfigured x402 services","prompt":"I'm building a directory of x402 APIs — probe https://api.examplellm.com/generate and tell me if the 402 response is properly formed or broken, and what payTo address it returns."},{"title":"Comparing latency across x402 providers","prompt":"Check https://api.anotherx402service.com/v1/complete and tell me how many milliseconds the x402 handshake takes and whether it's actually alive right now."}],"resultDescription":"Returns a JSON object indicating whether the URL is alive, whether it serves a valid x402 handshake, the HTTP status returned, the payment scheme, network (e.g. base), asset, payTo address, price in atomic units, price in USD if USDC, x402 version, and the latency in milliseconds.","failureModes":["Target URL is unreachable — alive: false, latency_ms may be null","Target returns HTTP 200 or other non-402 status — x402: false, valid_handshake: false","Malformed 402 response — valid_handshake: false with partial fields populated","Network timeout causing high latency_ms or probe failure","Invalid or unsupported asset/network returned by target","Probe service itself is unavailable (Cloudflare tunnel down)"],"whenToPreferThis":"Use this endpoint when you need to programmatically verify that a specific URL correctly implements the x402 payment protocol before paying or integrating — especially useful for pre-flight checks in agentic payment flows, building x402 service directories, or debugging 402 handshake issues. Prefer this over manual inspection or generic HTTP probes when you need structured x402-specific metadata like price, payTo address, network, and handshake validity.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-18T06:30:14.054Z","isFirstParty":false}