{"uid":"cap_jbFXvZLbw2ASTHjxQ03Nv","slug":"x402-mpp-paywall-verifier-a57bb107","name":"X402-MPP Paywall Verifier","description":"Deterministic B2A/A2A/MCP/x402/MPP/L402 execution and intelligence node at https://mcp-gateway.agentdiet.dev settling in USDC on Base.","url":"https://mcp-gateway.agentdiet.dev/v1/x402-mpp-paywall-verifier?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","POST"],"type":"string"},"queryParams":{"type":"object","properties":{"url":{"type":"string"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"data":{},"status":"ok","roi_proof":{"compression_ratio_pct":91.4}}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_U4Om3ByhIiyGNUDKTOmSR","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Verifies whether a given URL is protected by an x402/MPP paywall and returns structured proof of the paywall status including compression ratio metadata.","exampleAgentPrompt":"Can you check if the URL https://api.example.com/data is protected by an x402 or MPP paywall — use a GET method and tell me the verification status and any ROI proof you get back?","exampleUseCases":[{"title":"Detect x402 paywall before agent call","prompt":"Before my agent tries to call https://api.someservice.com/v1/results, can you verify whether it's behind an x402 or MPP paywall so I know if I need to pre-fund a USDC payment?"},{"title":"Audit API endpoints for paywall coverage","prompt":"I have this endpoint https://data.myprovider.io/feed — can you probe it with a GET request to check if it's protected by an x402 paywall and return the verification status?"},{"title":"Validate paywall ROI proof on a resource","prompt":"Check whether https://intelligence.agentdiet.dev/report requires an x402 micropayment and show me the compression ratio ROI proof from the verification response."}],"resultDescription":"Returns a JSON object with a 'status' field (e.g. 'ok'), a 'data' object containing paywall details, and a 'roi_proof' object including a 'compression_ratio_pct' value indicating the paywall's efficiency metrics. A status of 'ok' confirms successful verification.","failureModes":["Missing or invalid 'url' query parameter returns an error or empty data object","URL not reachable or returning non-402 response may yield inconclusive verification","Invalid HTTP method enum value (anything other than GET or POST) causes schema validation failure","Malformed input object missing required 'type' or 'method' fields results in rejection","USDC payment failure on Base network prevents endpoint access entirely"],"whenToPreferThis":"Use this endpoint when an AI agent needs to programmatically detect whether a target URL is protected by an x402, MPP, or L402 paywall before attempting to access or pay for it. Prefer this over manual inspection when building automated agent workflows that must decide whether to route a micropayment prior to fetching a resource.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-22T12:42:14.760Z","isFirstParty":false,"canonicalSlug":"x402-mpp-paywall-verifier-a57bb107"}