{"uid":"cap_mCx73V6QPddHn5XDcWrtW","slug":"oblique-markets-x402-endpoint-verifier-e24f2ff6","name":"Oblique Markets x402 Endpoint Verifier","description":"Use when an agent needs x402 endpoint verify. Returns Verify and lint a third-party x402 endpoint: probes the URL (SSRF-guarded), confirms it answers with a well-formed HTTP 402 challenge, and reports protocol-conformance findings — accepts[] completeness, facilitator price floor on Base, PAYMENT-REQUIRED header/body consistency, timeout sanity. $0.02.","url":"https://api.oblique.markets/api/v1/paid/x402-endpoint-verify","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"url":{"type":"string","description":"The https URL of the x402 endpoint to verify"},"method":{"enum":["GET","POST"],"type":"string","description":"HTTP method the endpoint sells on"}}},"responseSchema":{"type":"json","example":{"url":"https://api.example-seller.com/api/v1/paid/quote","method":"GET","is_x402":true,"findings":["accepts[1] amount 500 is below the CDP facilitator floor of 1079 atomic on eip155:8453 — unsellable through the main facilitator","PAYMENT-REQUIRED header is absent — x402 v2 clients that read the header instead of the body will not see the challenge"],"reachable":true,"checked_at":"2026-08-10T12:00:00.000Z","http_status":402,"x402_version":2,"accepts_count":2}},"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_qNRcQRua0yZ6ojV9nigvC","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":"Probes a third-party URL to confirm it returns a well-formed HTTP 402 challenge and reports x402 protocol-conformance findings including accepts[] completeness, CDP Base price floor, header/body consistency, and timeout sanity.","exampleAgentPrompt":"Can you verify that my x402 endpoint at https://api.myservice.com/paid/data is properly implemented — check if it returns a valid HTTP 402 challenge, that the accepts[] array is complete, the PAYMENT-REQUIRED header and body are consistent, and that the CDP Base price floor and timeout look sane?","exampleUseCases":[{"title":"Pre-launch x402 compliance check","prompt":"Before I list my API on agentic.market, can you verify my x402 endpoint at https://api.myproject.com/v1/premium/data is fully protocol-compliant — especially whether the accepts[] array covers all required payment methods and the 402 response body matches the headers?"},{"title":"Debugging a rejected payment endpoint","prompt":"My x402 endpoint at https://api.myservice.io/paid/results keeps getting rejected by facilitators — can you probe it and tell me exactly which conformance issues are causing the problem, like missing accepts[] entries or header/body mismatches?"},{"title":"Auditing a third-party x402 API before integration","prompt":"I'm thinking about integrating a third-party paid API at https://data.vendor.xyz/api/v2/feed — can you lint their x402 endpoint and tell me if their 402 challenge is well-formed, their CDP Base price floor is reasonable, and their timeout is sane before I build against it?"}],"resultDescription":"Returns a structured conformance report indicating whether the probed URL returns a valid HTTP 402 challenge, with specific findings on: accepts[] array completeness, CDP Base price floor adequacy, PAYMENT-REQUIRED header/body consistency, timeout sanity, and overall protocol compliance pass/fail status. SSRF-guard checks are applied before probing.","failureModes":["URL is blocked by SSRF guard (private/internal IP ranges rejected)","Target endpoint does not respond with HTTP 402 at all","Target endpoint is unreachable or times out during probe","Malformed or incomplete 402 response body prevents conformance analysis","accepts[] array is empty or missing required payment network entries","CDP Base price floor is absent or below minimum threshold"],"whenToPreferThis":"Use this endpoint when you need to validate that a specific URL correctly implements the x402 payment protocol before listing it on a facilitator or integrating it into an agentic payment flow. It is purpose-built for x402 conformance — covering accepts[] completeness, CDP Base price floor, header/body consistency, and timeout sanity — rather than generic HTTP testing or API health checks.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T06:45:51.542Z","isFirstParty":false}