{"uid":"cap_9gr_5tx4XbSVcUTPgfMLK","slug":"fiatdock-x402-marketplace-top-sellers-23865444","name":"FiatDock x402 Marketplace Top Sellers","description":"The x402 market by seller over the last 30 days: estimated revenue, paid calls, paying wallets, calls per payer, median price, networks and each seller's top resource - from Coinbase's public x402 discovery index, read hourly. Rank by revenue, calls or payers; filter by keyword and network; a payer floor (default 3) drops lone testers. Send {} for the top 20 by revenue. Pay-per-call via x402.","url":"https://fiatdock.com/v1/x402/top?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"],"type":"string"},"queryParams":{"type":"object","required":[],"properties":{"q":{"type":"string","example":"search","maxLength":80,"description":"Only sellers with a resource matching these words (e.g. \"search\", \"token safety\")"},"sort":{"enum":["revenue","calls","payers"],"type":"string","example":"revenue","description":"Rank by estimated 30-day revenue (default), 30-day calls, or paying wallets"},"limit":{"type":"integer","example":20,"maximum":50,"minimum":1,"description":"How many sellers, 1-50, default 20"},"network":{"type":"string","example":"base","maxLength":40,"description":"Only resources on this network (\"base\", \"solana\" or a CAIP-2 id like eip155:8453)"},"minPayers":{"type":"integer","example":3,"maximum":100000,"minimum":0,"description":"Only sellers with at least this many paying wallets on one resource (default 3 — fewer is usually a single tester)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"q":null,"note":"estRevenue30dUsd = calls × listed price, an estimate.","sort":"revenue","count":1,"stale":false,"source":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","totals":{"hosts":1017,"calls30d":737843,"resources":12756,"estRevenue30dUsd":45228.14},"network":null,"services":[{"host":"ax1.vc","calls30d":343719,"networks":["eip155:8453"],"resources":1,"topResource":{"url":"https://ax1.vc/api/dashboard/q-verdict/resource","name":"AX1 Console","calls30d":343719,"priceUsd":0.02,"payers30d":4740,"description":"Send a Base token contract address, get an AI-written verdict"},"lastCalledAt":"2026-10-05T00:00:00.000Z","payers30dMax":4740,"callsPerPayer":72.5,"medianPriceUsd":0.02,"estRevenue30dUsd":6874.38,"unpricedResources":0}],"indexedAt":"2026-10-05T00:00:00.000Z","minPayers":3}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.009","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":"$0.009/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_kHg0c1MzsZyCcYcrbVPLv","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.009","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns a ranked leaderboard of x402 pay-per-call API sellers with 30-day revenue, call volume, paying wallet counts, and top resource details from Coinbase's x402 discovery index.","exampleAgentPrompt":"Show me the top 10 x402 API sellers ranked by number of paying wallets on the Base network — only include sellers with at least 5 paying wallets so we skip lone testers.","exampleUseCases":[{"title":"Scouting high-revenue x402 APIs","prompt":"What are the top 20 x402 API sellers by estimated revenue over the last 30 days? I want to see who's actually making money in the x402 ecosystem."},{"title":"Finding token safety APIs with real users","prompt":"Find me x402 APIs related to 'token safety' that have at least 3 paying wallets — I want services with real customers, not just people testing their own endpoints."},{"title":"Exploring Solana x402 marketplace activity","prompt":"Which x402 sellers are most active on the Solana network? Rank them by number of paid calls and show me up to 15 results."}],"resultDescription":"A ranked list of up to 50 x402 API sellers, each with: estimated 30-day revenue, total paid calls, number of distinct paying wallets, calls-per-payer ratio, median price, networks used, and the seller's single top-performing resource URL and description.","failureModes":["No sellers match the keyword filter — returns empty list","Network identifier not recognized — may return empty or unfiltered results","minPayers set too high — filters out all sellers and returns empty list","Payment not received — x402 402 response requiring USDC payment before data is returned","Index temporarily unavailable — upstream Coinbase discovery index read may fail"],"whenToPreferThis":"Use this endpoint when you need structured market intelligence about the x402 pay-per-call ecosystem — specifically seller rankings, revenue estimates, and wallet engagement metrics. Prefer this over general API directories when you specifically want x402-protocol services, need to identify which APIs have genuine paying customers vs lone testers, or want to filter by blockchain network. It reads hourly from Coinbase's index so data is near-real-time for a 30-day window.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-19T12:34:05.654Z","isFirstParty":false,"canonicalSlug":"fiatdock-x402-marketplace-top-sellers-23865444"}