{"uid":"cap_T--fT5POa1RUA8fis00pM","slug":"x402-listing-quality-scanner-f92232e8","name":"x402 Listing Quality Scanner","description":"x402 listing-quality snapshot from public discovery catalogs (CDP and/or PayAI). Scores unique-payer vs wash when quality fields exist. No invented market sizes. Cached 15 minutes.","url":"https://x402-niche-briefs.fly.dev/v1/listing-quality","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","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"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":"$0.05/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.05","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_hyfBpz79JfEmbFubr9rnB","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.05","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a quality snapshot of x402 API listings from public discovery catalogs, scoring unique-payer activity versus wash trading when quality fields are available.","exampleAgentPrompt":"Can you pull a listing quality snapshot from the x402 discovery catalogs and tell me how many listings have real unique payers versus suspected wash activity?","exampleUseCases":[{"title":"Marketplace integrity audit","prompt":"Run a listing quality scan on the x402 discovery catalog and show me which listings look legitimate versus those that might have wash trading inflating their payer counts."},{"title":"Developer vetting before integration","prompt":"Before I build on top of an x402 API, can you check the listing quality scanner to see if that listing has genuine unique payers or if the activity looks artificial?"},{"title":"Periodic catalog health check","prompt":"Pull the latest x402 listing quality snapshot from the public catalogs and summarize the overall health — how many listings score well on uniqueness versus how many show wash signals?"}],"resultDescription":"Returns a cached (15-minute TTL) quality snapshot of x402 API listings sourced from public discovery catalogs (CDP and/or PayAI), including scores distinguishing unique payers from wash activity when quality fields are present. No synthetic or invented market size figures are included.","failureModes":["Cache miss may cause slightly higher latency on first call within 15-minute window","Quality fields absent for some listings — scoring may be incomplete or omitted","Discovery catalog unavailable — endpoint may return empty or partial results","Invalid request method returns error (only GET supported)","Upstream CDP or PayAI catalog unreachable — degraded or no data returned"],"whenToPreferThis":"Choose this endpoint when you need an objective, data-driven quality assessment of x402 API listings from public discovery catalogs, particularly to distinguish genuine marketplace activity from wash trading. It is best suited for vetting listings before integration, auditing marketplace integrity, or monitoring catalog health. Prefer this over manual inspection or generic API directory browsing when you need scored, structured quality signals with transparency about data provenance.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T12:34:20.040Z","isFirstParty":false}