{"uid":"cap_RoinOWTFnmduoUirm7fjF","slug":"council-of-ai-x402-conformance-checker-943913b4","name":"Council of AI x402 Conformance Checker","description":"We measure how AI systems behave against frozen, published tests and publish checkable evidence. Issued measurement cards are signed; unsigned supporting runs are labelled. Read the live board and corrections ledger.","url":"https://councilof.ai/api/ras/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","HEAD","DELETE"],"type":"string"},"queryParams":{"type":"object","required":["url"],"properties":{"url":{"type":"string","format":"uri","pattern":"^https://","description":"public https x402 resource URL, exactly as a buyer would GET it"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"kind":"receipt","result":{"row":{"status":402,"conformant":true,"x402_version":2,"has_bazaar_extension":true,"payment_required_header":true},"kind":"csoai.ras.x402-check/0.1","rule":"Conformant = HTTP 402 AND a PAYMENT-REQUIRED response header AND x402Version 2 in the body AND an extensions.bazaar block.","state":"CONFORMANT | NOT_CONFORMANT | UNREACHABLE"},"schema":"csoai.ras.x402-check/0.1","receipt":{"sha256":"<hex>","sig_ed25519":"<hex or null>"}}},"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_N6zchkf8gYTAOD4BoK4KD","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":"Checks whether a given public HTTPS URL correctly implements the x402 payment protocol and returns a signed conformance receipt","exampleAgentPrompt":"Can you check whether https://myapi.example.com/premium-data correctly implements the x402 payment protocol and get me a signed conformance receipt showing whether it passes?","exampleUseCases":[{"title":"Pre-launch x402 compliance audit","prompt":"I'm about to launch my paid API at https://data.myservice.com/feed — can you run an x402 conformance check on it and tell me whether it's fully compliant, including whether it has the bazaar extension and the right headers?"},{"title":"Third-party proof of x402 compliance","prompt":"I need independent, signed proof that https://api.partner.com/reports is a conformant x402 endpoint — can you fetch a signed receipt from Council of AI so I can share it with my stakeholders?"},{"title":"Debugging a broken x402 endpoint","prompt":"My endpoint at https://api.acme.io/premium/data is returning 402 but buyers say payments aren't working — can you run an x402 conformance check on it so I can see exactly which parts of the spec it's failing?"}],"resultDescription":"A JSON object with a 'kind' of 'receipt', containing a 'result' block that includes the HTTP status code, whether the endpoint is conformant, the x402 version detected, presence of the payment-required header, and whether the bazaar extension block is present. Also includes a 'state' field (CONFORMANT, NOT_CONFORMANT, or UNREACHABLE), the schema version, and a cryptographic receipt with a SHA-256 hash and optional ed25519 signature.","failureModes":["URL is unreachable or times out — state returned as UNREACHABLE","URL does not return HTTP 402 — conformant field is false","Missing PAYMENT-REQUIRED response header — conformant field is false","x402Version in body is not 2 — conformant field is false","Missing extensions.bazaar block — conformant field is false","Non-HTTPS URL provided — rejected by input schema validation","Receipt may be unsigned (sig_ed25519 null) for supporting runs"],"whenToPreferThis":"Use this endpoint when you need independent, cryptographically signed third-party verification that a specific public HTTPS URL correctly implements the x402 payment protocol per version 2 of the spec. Prefer this over manual inspection when you need a checkable, publishable conformance receipt — especially for auditing partner APIs, validating your own implementation before launch, or debugging x402 compliance failures.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-02T03:27:05.228Z","isFirstParty":false,"canonicalSlug":"council-of-ai-x402-conformance-checker-943913b4"}