{"uid":"cap_Tp8l5uSTPjftlGbbdB8nC","slug":"x402-endpoint-health-payment-parameter-vetter-3cbc4b56","name":"x402 Endpoint Health & Payment Parameter Vetter","description":"Checks an x402 (HTTP 402 payment) endpoint before you pay: one unpaid GET, then the HTTP status, whether a 402 challenge with an accepts list is present, the payment networks, asset, price and pay-to address format, CORS header and response time. Does not pay, does not verify the seller's identity or reputation, and gives one sample, not uptime.","url":"https://api.fadeandco.workers.dev/api/agent-intel/x402-endpoint-health-vetting?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"],"type":"string"},"queryParams":{"type":"object","required":["url"],"properties":{"url":{"type":"string","description":"Public https:// endpoint address"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"url":"https://httpbin.org/status/402","note":"One unpaid request. Says nothing about uptime, seller identity or reputation.","first":null,"source":"https://httpbin.org/status/402","verdict":"402_WITHOUT_X402_ACCEPTS","networks":[],"checkedAt":"2026-10-23T09:35:20.497Z","httpStatus":402,"responseMs":816,"acceptsCount":0,"corsAllowOrigin":"*"}},"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_da3IyQtG4GFp6k3Mq7YcG","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":"Probes a public HTTPS endpoint for x402 payment challenge details (networks, asset, price, pay-to address, CORS) without making a payment","exampleAgentPrompt":"Before I pay anything, can you check what payment networks, asset, price, and pay-to address format that x402 endpoint at https://api.example.com/premium-data requires, and whether its CORS header is set correctly?","exampleUseCases":[{"title":"Pre-flight check before paying an API","prompt":"I want to call https://api.someservice.com/data but I think it requires a payment — can you probe it and tell me what asset and price it expects, which networks it accepts, and how fast it responds, without actually paying?"},{"title":"Validating x402 configuration of a new endpoint","prompt":"I just deployed my x402-gated endpoint at https://mypaywall.workers.dev/api/report — can you check whether the 402 challenge is properly formed, what networks and assets are listed, and if CORS is set up correctly?"},{"title":"Comparing payment terms across a vendor's endpoint","prompt":"Can you inspect https://vendor.io/api/premium and tell me the exact price, asset, and pay-to address it advertises in its x402 challenge, plus how many milliseconds it takes to respond?"}],"resultDescription":"Returns a JSON object with: the URL checked, HTTP status code, a verdict string (e.g. '402_WITHOUT_X402_ACCEPTS' or valid x402), list of accepted payment networks, asset, price, pay-to address format, CORS allow-origin header value, response time in milliseconds, number of accepts, and a timestamp. Explicitly notes this is one unpaid sample and says nothing about uptime or seller identity.","failureModes":["Non-HTTPS or unreachable URLs return an error or null first-response","Endpoints that don't return 402 at all yield a non-x402 verdict","Endpoints with a 402 but no valid x402 accepts list yield '402_WITHOUT_X402_ACCEPTS' verdict","Network timeouts may produce null response fields","No payment is attempted so paywalled response bodies are not validated"],"whenToPreferThis":"Use this endpoint when you need to inspect an x402-gated URL's payment parameters before committing funds — specifically to see which blockchain networks and assets are accepted, the price, the pay-to address format, and CORS configuration. Prefer it over manually reading 402 headers when you want a structured, parsed summary. Not suitable for verifying seller reputation, testing endpoint uptime, or actually executing a payment.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T12:36:51.548Z","isFirstParty":false,"canonicalSlug":"x402-endpoint-health-payment-parameter-vetter-3cbc4b56"}