{"uid":"cap_AloAnqKWV9bOgVeIrLw1h","slug":"maxwell-x402-doctor-endpoint-checkup-ccc17373","name":"Maxwell x402 Doctor – Endpoint Checkup","description":"x402 Doctor checkup of any x402 endpoint, without buying: whether it answers with a valid payment request, its x402 version and any problems in it, the prices and networks it asks for, its payTo wallets and response time.","url":"https://api.maxwellinternational.ai/v1/doctor/checkup?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","HEAD","DELETE"],"type":"string"},"headers":{"type":"object","additionalProperties":{"type":"string"}},"queryParams":{"type":"object","additionalProperties":{"type":"string"}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"verdict":"seller_up"}},"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_HlO2kJQPIpbgtejxOyLAA","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":"Diagnoses any x402-enabled endpoint to reveal whether it returns a valid payment request, its x402 version, pricing, accepted networks, payTo wallets, and response time — without making a payment.","exampleAgentPrompt":"Can you run an x402 doctor checkup on https://api.example.com/some-endpoint using a GET request and tell me if it returns a valid payment request, what price it asks for, which networks it accepts, and what wallet it pays to?","exampleUseCases":[{"title":"Pre-integration x402 endpoint audit","prompt":"Before I integrate this x402-gated API into my app, can you check https://api.some-seller.com/data with a GET request and tell me if the payment request is valid, what the price is, which blockchain networks it supports, and if there are any problems in the response?"},{"title":"Debugging a broken x402 seller","prompt":"My x402 endpoint at https://api.mypaywall.com/report isn't getting purchased — can you do a doctor checkup on it with a GET request to see if the 402 response is correctly formed or if there's something wrong with it?"},{"title":"Comparing wallet addresses across x402 APIs","prompt":"I want to verify the payTo wallet addresses for two x402 endpoints: https://api.vendor-a.com/feed and https://api.vendor-b.com/stream — can you checkup each one with GET and show me where the money goes and what networks they use?"}],"resultDescription":"Returns a verdict string (e.g. 'seller_up') along with the x402 version detected, any structural problems found in the payment request, the list of prices and currencies requested, accepted blockchain networks, the payTo wallet addresses, and the measured response time — all without triggering an actual payment.","failureModes":["Target endpoint is unreachable or times out — checkup cannot complete","Target endpoint does not return a 402 response — verdict reflects non-x402 behavior","Malformed input URL or unsupported HTTP method causes validation error","Network or DNS resolution failure for the target endpoint","Target endpoint rate-limits or blocks the probe request"],"whenToPreferThis":"Use this endpoint when you need to inspect, validate, or debug an x402-enabled API endpoint without spending any funds. It is the right choice when you want to verify payment request correctness, discover pricing and wallet details, or audit x402 compliance before building an integration or troubleshooting a failed payment flow. Prefer this over the x402 Doctor 'why did my payment fail' sibling when you have not yet attempted a payment and simply want to probe the seller's 402 response.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T04:22:38.668Z","isFirstParty":false,"canonicalSlug":"maxwell-x402-doctor-endpoint-checkup-ccc17373"}