{"uid":"cap_A2Q4zlMfJmNBdMZas0CUG","slug":"x402-doctor-url-payability-checker-df761ba0","name":"x402 Doctor — URL Payability Checker","description":"x402 Doctor: is a URL a valid agent-payable paid resource? v1+v2 spec check with grade and verdict","url":"https://agentx.sale/x402/x402-check?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"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"url":"https://example.com/paid","grade":"A","verdict":"agent-payable"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.02","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":"$0.02/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.02","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_ab703PhD0g2VFtYdXtegp","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.02","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates whether a URL is a properly implemented x402 agent-payable resource, grading it against v1 and v2 of the x402 spec and returning a verdict with grade","exampleAgentPrompt":"Check if https://example.com/paid-resource is a valid x402 agent-payable endpoint — run both the v1 and v2 spec checks and give me a compliance grade and verdict.","exampleUseCases":[{"title":"Pre-integration x402 compliance audit","prompt":"Before I wire up payments to https://api.myservice.com/premium-data, can you check if it's actually a valid x402 resource — does it pass the spec, and what grade does it get?"},{"title":"Debugging a broken x402 endpoint","prompt":"My x402-protected endpoint at https://agentx.sale/some-resource seems to be rejecting agents even when they pay — can you run the x402 doctor on it and tell me what's wrong with the spec compliance?"},{"title":"Vetting a third-party paid API before use","prompt":"I'm about to build an agent that calls https://thirdparty.io/data-feed, which claims to support x402 payments — can you validate whether it actually implements the spec correctly and give me a grade?"}],"resultDescription":"Returns a compliance verdict and grade indicating whether the target URL correctly implements the x402 paid resource protocol, with specific feedback against v1 and/or v2 spec requirements, highlighting any failures or gaps in the implementation.","failureModes":["Target URL is unreachable or returns a non-402 status when probed — validation cannot proceed","URL is not an HTTP GET endpoint — method mismatch with x402 check requirements","Target URL has no x402 payment headers at all — returns not-a-paid-resource verdict","Network timeout reaching the target URL","Malformed URL input causes schema validation error"],"whenToPreferThis":"Use this endpoint when you need to verify that a specific URL correctly implements the x402 payment protocol before integrating it into an agentic workflow, or when debugging why an x402-protected resource is not behaving as expected. Prefer this over manual spec review when you need a quick, graded, machine-readable compliance verdict covering both v1 and v2 of the x402 spec.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T07:19:28.556Z","isFirstParty":false,"canonicalSlug":"x402-doctor-url-payability-checker-df761ba0"}