{"id":"9e22c75e-c11f-4472-864d-bfdc456358c6","shortId":"f5sj2b","kind":"x402","title":"NFT collection floor-price data via x402 micropayment on Base, $0.02 per request.","tagline":"NFT collection floor-price data via x402 micropayment on Base, $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns floor-price data for NFT collection ID 11. It is part of a broader suite of pay-per-call APIs offered by lowpaymentfee.com, all priced at $0.02 per request and settled in USDC on the Base network via the x402 protocol. No API keys or accounts are required — callers simply attach an x402 payment header to each POST request.\n\nThe x402 challenge confirms the endpoint is live and accepts USDC (contract 0x8335…2913 on Base) with a maxAmountRequired of 20,000 base units, which equals $0.02 given USDC's 6-decimal precision. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout window. The response MIME type is application/json.\n\nThe provider's landing page lists many other endpoints spanning data analytics, AI/ML inference, finance/Web3 market data, and utility services — all at the same $0.02 price point. However, documentation beyond the landing page is essentially empty (all sub-pages just show \"Connect wallet\"), so there is no schema documentation for request bodies or response shapes for this specific collections/floor endpoint. The exact request parameters and response fields must be discovered experimentally.","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-base","pay-per-request","json-api","no-api-key"],"categories":["crypto","nft","finance"],"synonyms":["NFT floor price","collection floor","NFT market data","crypto collection data","NFT pricing API","floor price lookup"],"warnings":["No request or response schema documentation available — all doc/pricing/README pages are empty stubs","The endpoint purpose (NFT collection floor price) is inferred solely from the URL path; the provider labels it only as 'Premium API Access'","This specific endpoint (/api/v1/collections/11/floor) is not listed on the provider's landing page among their advertised APIs","No OpenAPI spec or AI plugin manifest found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/11/floor","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/collections/11/floor","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is zero documentation for request/response schemas. All doc pages return only 'Connect wallet'. The endpoint path suggests NFT collection floor data, but this is inferred from the URL — no explicit description exists beyond the generic 'Premium API Access' 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'000':116 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':134 '0x8335':107 '11':42 '20':115 '2913':108 '300':137 '6':125 'NFT floor price' 'NFT market data' 'NFT pricing API' 'accept':104 'account':81 'address':133 'ai/ml':159 'analyt':158 'api':55,78 'application/json':146 'attach':86 'base':11,25,71,110,117 'beyond':176 'bodi':199 'broader':48 'call':54 'caller':84 'challeng':97 'collect':2,16,40 'collection floor' 'collections/floor':206 'confirm':98 'connect':189 'contract':106 'crypto collection data' 'data':6,20,37,157,163 'decim':126 'discov':217 'document':175,196 'empti':182 'endpoint':30,100,155,207 'equal':120 'essenti':181 'exact':209 'experiment':218 'field':214 'finance/web3':161 'floor':4,18,35 'floor price lookup' 'floor-pric':3,17,34 'given':122 'header':90 'howev':174 'id':41 'infer':160 'json-api' 'key':79 'land':150,178 'list':152 'live':102 'lowpaymentfee.com':32,58 'mani':153 'market':162 'maxamountrequir':113 'micropay':9,23 'mime':143 'must':215 'network':72 'nft':1,15,39 'nft-floor-price' 'no-api-key' 'offer':56 'page':151,179,186 'paramet':211 'part':45 'pay':52 'pay-per-cal':51 'pay-per-request' 'payment':89,129 'per':13,27,53,63 'point':173 'post':93 'precis':127 'price':5,19,36,60,172 'protocol':76 'provid':148 'request':14,28,64,94,198,210 'requir':83 'respons':142,201,213 'return':33 'schema':195 'second':138 'sent':131 'servic':166 'settl':66 'shape':202 'show':188 'simpli':85 'span':156 'specif':205 'sub':185 'sub-pag':184 'suit':49 'timeout':139 'type':144 'unit':118 'usdc':68,105,123 'usdc-base' 'util':165 'via':7,21,73 'wallet':190 'window':140 'x402':8,22,75,88,96 'x402-payment'","prices":[{"id":"811eb64b-ca04-45e0-814d-1abbb26bbf6f","listingId":"9e22c75e-c11f-4472-864d-bfdc456358c6","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/collections/11/floor","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T23:59:54.767Z"}],"sources":[{"listingId":"9e22c75e-c11f-4472-864d-bfdc456358c6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/11/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T23:59:54.767Z","lastSeenAt":"2026-04-23T00:32:38.853Z"}],"details":{"listingId":"9e22c75e-c11f-4472-864d-bfdc456358c6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/11/floor \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge returns maxAmountRequired of 20000 base units in USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/collections/11/floor"},{"claim":"All APIs on the site are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation, pricing, and README pages all render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieve the current floor price for a specific NFT collection","Feed NFT floor-price data into trading bots or portfolio trackers","Monitor NFT market trends programmatically without API key management"],"bestFor":["Agents or bots that need on-demand NFT floor prices without signup","Developers who prefer pay-per-call micropayments over subscription APIs","Crypto-native applications already holding USDC on Base"],"notFor":["Users needing bulk historical NFT price data (no batch or historical endpoint documented)","Applications that cannot settle payments in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.16Z"},"updatedAt":"2026-04-23T00:32:38.853Z"}}