{"uid":"cap_5jGMY6k8_YHbsyECGB4R8","slug":"pennyrail-market-intelligence-top-x402-sellers-65564cc6","name":"PennyRail Market Intelligence – Top x402 Sellers","description":"Machine-readable settlement service","url":"https://pennyrail.vercel.app/api/p/intel/market.x402-trending--top-x402-sellers","method":"POST","headers":{},"bodySchema":{"type":"object","required":["input"],"properties":{"input":{"type":"object"}}},"responseSchema":{"type":"object","additionalProperties":true},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.005","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":"$0.005/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.005","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_a_B_PPZc1gUyDxux9Us_W","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.005","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns trending top sellers and market intelligence data for x402 micropayment-gated APIs","exampleAgentPrompt":"Can you pull up the current trending top sellers on the x402 API market and show me which endpoints are performing best right now?","exampleUseCases":[{"title":"Discovering hot x402 APIs to integrate","prompt":"What are the top trending x402 API sellers right now? I want to see which micropayment-gated endpoints are most popular so I can decide what to integrate into my app."},{"title":"Competitive landscape research for x402 builders","prompt":"I'm building an x402-monetized API and want to understand the market — can you fetch the current top sellers so I can see what's already out there and how competitive things are?"},{"title":"Investment signal for x402 ecosystem","prompt":"Show me which x402 APIs are trending and leading in sales volume — I'm trying to spot which projects in the micropayment API space are getting the most traction."}],"resultDescription":"Returns a structured object containing ranked lists of top-performing and trending x402 protocol API sellers, including seller identifiers, popularity metrics, and market positioning data within the x402 micropayment ecosystem.","failureModes":["Empty or null input object may return empty results or validation error","Service unavailable if Vercel deployment is down or cold-starting","Payment of $0.005 USDC required via x402 protocol — missing or failed payment returns 402 Payment Required","Market data may be stale or unavailable if upstream data sources are offline","Malformed response if additionalProperties schema returns unexpected structure"],"whenToPreferThis":"Choose this endpoint when you need real-time or near-real-time rankings of top x402 micropayment API sellers and trending market data. Prefer this over generic API directories when you specifically want intelligence about the x402 protocol ecosystem — it is purpose-built for the x402 payment-gated API marketplace rather than traditional REST APIs or SaaS products.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:47:02.866Z","isFirstParty":false}