{"id":"db156acd-e466-49ee-9b5d-3883a01b1219","shortId":"2tb9xR","kind":"x402","title":"NFT collection floor-price lookup via x402 micropayment on Base for $0.02 per request.","tagline":"NFT collection floor-price lookup via x402 micropayment on Base for $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns floor-price data for NFT collection ID 24. 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, accepting payments of up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) per call. The payment is sent to address 0x1A2B…85F3 with a 300-second timeout. The response MIME type is application/json.\n\nThe provider's landing page lists many other endpoints spanning data/analytics, AI/ML (sentiment, summarization, classification, embeddings), finance/Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all at the same $0.02 price point. However, documentation beyond the landing page is essentially empty (all sub-pages only show a \"Connect wallet\" prompt), so there is no schema documentation, example responses, or detailed parameter descriptions available for this or any other endpoint on the platform.","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-base","pay-per-request","no-api-key","json-response"],"categories":["crypto","nft","finance"],"synonyms":["NFT floor price","collection floor","NFT valuation","floor price API","NFT market data","crypto collectibles price"],"warnings":["No documentation available — all doc/pricing/API pages return only 'Connect wallet' with no content.","No request or response schema provided; the actual shape of the floor-price response is unknown.","Collection ID 24 is opaque — there is no indication of which NFT collection this refers to.","The broader platform lists many endpoints but none appear to have public documentation."],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/24/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/24/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 this specific endpoint — no request/response schema, no example payloads, and no description of what collection 24 is. All doc pages return only 'Connect wallet'. The listing is effectively a 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'000':111 '0x1a2b':131 '0x8335':116 '20':110 '24':44 '2913':117 '300':135 '6':120 '85f3':132 'NFT floor price' 'NFT market data' 'NFT valuation' 'accept':105 'account':83 'address':130 'ai/ml':155 'api':57,80 'application/json':143 'attach':88 'avail':214 'base':11,26,73,112,119 'beyond':185 'broader':50 'call':56,124 'caller':86 'challeng':99 'classif':158 'collect':2,17,42 'collection floor' 'confirm':100 'connect':199 'convers':174 'crypto collectibles price' 'data':39 'data/analytics':154 'decim':121 'descript':213 'detail':211 'document':184,207 'embed':159 'empti':191 'endpoint':32,102,152,220 'essenti':190 'estim':168 'exampl':208 'exchang':163 'feed':162 'finance/web3':160 'floor':4,19,37 'floor price API' 'floor-pric':3,18,36 'gas':167 'generat':175 'geocod':172 'header':92 'howev':183 'id':43 'infrastructur':170 'json-response' 'key':81 'land':147,187 'list':149 'live':104 'lookup':6,21 'lowpaymentfee.com':34,60 'mani':150 'micropay':9,24 'mime':140 'network':74 'nft':1,16,41 'nft-floor-price' 'no-api-key' 'offer':58 'page':148,188,195 'paramet':212 'part':47 'pay':54 'pay-per-cal':53 'pay-per-request' 'payment':91,106,126 'per':14,29,55,65,123 'platform':223 'point':182 'post':95 'price':5,20,38,62,161,181 'prompt':201 'protocol':78 'provid':145 'quot':166 'rate':164 'request':15,30,66,96 'requir':85 'respons':139,209 'return':35 'schema':206 'second':136 'sent':128 'sentiment':156 'settl':68 'show':197 'simpli':87 'span':153 'sub':194 'sub-pag':193 'suit':51 'summar':157 'timeout':137 'token':165 'type':141 'unit':113 'usdc':70,115 'usdc-base' 'util':171 'valid':173 'via':7,22,75 'wallet':200 'x402':8,23,77,90,98 'x402-payment'","prices":[{"id":"0ac50eef-a0c2-48eb-8cc4-9b55a376760a","listingId":"db156acd-e466-49ee-9b5d-3883a01b1219","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/24/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":"2026-04-18T22:29:46.491Z"}],"sources":[{"listingId":"db156acd-e466-49ee-9b5d-3883a01b1219","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/24/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T22:29:46.491Z","lastSeenAt":"2026-04-23T02:02:01.873Z"}],"details":{"listingId":"db156acd-e466-49ee-9b5d-3883a01b1219","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/24/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":"Endpoint returns 402 with x402 challenge accepting up to 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/24/floor"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/collections/24/floor"},{"claim":"All APIs priced at $0.02 per request with no API keys, no rate limits, on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Querying the current floor price of a specific NFT collection programmatically","Building NFT portfolio trackers that need real-time floor data","Automated trading bots that monitor NFT collection floors for arbitrage opportunities"],"bestFor":["Agents or bots that need on-demand NFT floor prices without managing API keys","Developers prototyping NFT tools who want instant, low-cost access","x402-native applications on Base that can pay per call in USDC"],"notFor":["High-frequency bulk data ingestion where per-request fees add up quickly","Users who need detailed NFT metadata, traits, or historical sales beyond floor price"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.321Z"},"updatedAt":"2026-04-23T02:02:01.873Z"}}