{"id":"6d1dc6de-66a1-438f-9ba9-cebdcdee4272","shortId":"gnDMuj","kind":"x402","title":"NFT collection floor-price lookup via x402 micropayment on Base (USDC).","tagline":"NFT collection floor-price lookup via x402 micropayment on Base (USDC).","description":"This endpoint at lowpaymentfee.com returns the floor price for NFT collection ID 23. It is part of a broader platform offering pay-per-call APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories, all settled via the x402 protocol on the Base network using USDC.\n\nThe specific endpoint `/api/v1/collections/23/floor` accepts POST requests and returns JSON. Payment is handled inline via the x402 header mechanism: each call costs up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) on Base, paid to the provider's wallet. No API keys or rate limits are advertised — access is gated purely by micropayment.\n\nDocumentation is extremely sparse. The landing page lists many endpoints but provides no request/response schemas, parameter descriptions, or usage examples. The /docs, /pricing, /api, and /README pages all returned only a \"Connect wallet\" prompt with no substantive content. The endpoint path suggests it retrieves floor-price data for a specific collection (ID 23), but there is no documentation confirming what collection this refers to or what fields the response contains.","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-micropayment","base-network","pay-per-request","json-api"],"categories":["finance","nft"],"synonyms":["NFT floor price","collection floor","NFT market data","x402 API","micropayment API","Base USDC API","NFT pricing"],"warnings":["No API documentation available — all doc pages return only a wallet-connect prompt","No request or response schema provided; response format is unknown","Collection ID 23 is not identified — unclear what NFT collection this covers","The broader platform lists many endpoints but none appear documented beyond a title and price"],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/23/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/23/floor","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC per call on Base). However, there is no documentation, no request/response schema, no examples, and no indication of what collection ID 23 refers to. The docs pages are all empty wallet-connect 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'/api/v1/collections/23/floor':74 '/docs':151 '/pricing':152 '/readme':155 '0.02':101 '000':96 '20':95 '23':37,183 '6':106 'Base USDC API' 'NFT floor price' 'NFT market data' 'NFT pricing' 'accept':75 'access':124 'across':51 'advertis':123 'ai/ml':54 'analyt':53 'api':50,117 'base':11,23,67,97,109 'base-network' 'broader':43 'call':49,91 'categori':58 'collect':2,14,35,181,191 'collection floor' 'confirm':189 'connect':161 'contain':200 'content':167 'cost':92 'data':52,177 'decim':107 'descript':146 'document':130,188 'endpoint':26,73,139,169 'exampl':149 'extrem':132 'field':197 'finance/web3':55 'floor':4,16,31,175 'floor-pric':3,15,174 'gate':126 'handl':83 'header':88 'id':36,182 'infrastructur':57 'inlin':84 'json':80 'json-api' 'key':118 'land':135 'limit':121 'list':137 'lookup':6,18 'lowpaymentfee.com':28 'mani':138 'mechan':89 'micropay':9,21,129 'micropayment API' 'network':68 'nft':1,13,34 'nft-floor-price' 'offer':45 'page':136,156 'paid':110 'paramet':145 'part':40 'path':170 'pay':47 'pay-per-cal':46 'pay-per-request' 'payment':81 'per':48 'platform':44 'post':76 'price':5,17,32,176 'prompt':163 'protocol':64 'provid':113,141 'pure':127 'rate':120 'refer':193 'request':77 'request/response':143 'respons':199 'retriev':173 'return':29,79,158 'schema':144 'settl':60 'sinc':103 'spars':133 'specif':72,180 'substant':166 'suggest':171 'unit':98 'usag':148 'usd':102 'usdc':12,24,70,100,104 'usdc-micropayment' 'use':69,105 'via':7,19,61,85 'wallet':115,162 'x402':8,20,63,87 'x402 API' 'x402-payment'","prices":[{"id":"37f99bd2-7929-4283-bac9-d5127d628f56","listingId":"6d1dc6de-66a1-438f-9ba9-cebdcdee4272","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/23/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":"2026-04-18T22:29:50.728Z"}],"sources":[{"listingId":"6d1dc6de-66a1-438f-9ba9-cebdcdee4272","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/23/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T22:29:50.728Z","lastSeenAt":"2026-04-23T00:32:38.816Z"}],"details":{"listingId":"6d1dc6de-66a1-438f-9ba9-cebdcdee4272","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/23/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 requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/collections/23/floor"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/23/floor"},{"claim":"maxAmountRequired is 20000 base units (0.02 USD with 6 decimals)","source_url":"https://lowpaymentfee.com/api/v1/collections/23/floor"}],"useCases":["Querying the current floor price of a specific NFT collection programmatically","Building trading bots that need real-time NFT floor data","Monitoring NFT collection valuations without managing API keys"],"bestFor":["Agents or bots that need on-demand NFT floor prices without subscription commitments","Developers experimenting with x402 micropayment-gated APIs","Low-volume NFT data consumers who prefer pay-per-call pricing"],"notFor":["High-volume NFT analytics requiring bulk data or historical time series","Users who need detailed collection metadata, traits, or individual token data","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.16Z"},"updatedAt":"2026-04-23T00:32:38.816Z"}}