{"id":"952f3c23-207d-4b92-a570-3a909ab6fc04","shortId":"MUqGuq","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 returns the floor price for NFT collection ID 13, hosted on lowpaymentfee.com. It is part of a broader suite of pay-per-call APIs covering data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints on the platform use the x402 payment protocol, settling in USDC on the Base network at $0.02 per request.\n\nThe specific endpoint `/api/v1/collections/13/floor` accepts POST requests and returns JSON. Based on the URL structure, it likely serves NFT marketplace or collection data — specifically the floor price for a given collection. However, no detailed documentation, request/response schema, or examples are available from the crawled pages (docs, pricing, and API pages all returned only a \"Connect wallet\" prompt with no further content).\n\nThe endpoint is live and returns a valid x402 challenge (HTTP 402) with a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02. Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on the Base network. No API keys or rate limits are advertised; access is purely pay-per-call.","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-base","pay-per-request","json-api","collection-data"],"categories":["finance","web3","nft"],"synonyms":["NFT floor price","collection floor","NFT market data","floor price API","NFT collection stats","crypto collectibles data"],"warnings":["No API documentation available — docs page only shows 'Connect wallet'","No request or response schema provided; endpoint behavior is inferred from URL path only","Collection ID 13 is hardcoded in the URL; unclear what collection it refers to","The broader platform lists many endpoints but none have documented schemas"],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/13/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/13/floor","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation, no request/response schema, and no examples available. The docs, pricing, and API pages are all empty beyond a wallet-connect prompt. The endpoint's purpose is inferred solely from its URL path. This is effectively a stub 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'0.02':12,26,84,174 '000':165 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':180 '13':39 '20':164 '402':159 '6':170 'NFT collection stats' 'NFT floor price' 'NFT market data' 'accept':91 'access':193 'address':179 'advertis':192 'ai/ml':59 'analyt':58 'api':55,135,186 'avail':127 'base':11,25,81,97,166,183 'broader':48 'call':54,199 'challeng':157 'collect':2,16,37,108,117 'collection floor' 'collection-data' 'connect':141 'content':147 'cover':56 'crawl':130 'crypto collectibles data' 'data':6,20,57,62,109 'decim':171 'detail':120 'doc':132 'document':121 'endpoint':30,67,89,149 'equal':173 'exampl':125 'finance/web3':61 'floor':4,18,33,112 'floor price API' 'floor-pric':3,17 'given':116 'host':40 'howev':118 'http':158 'id':38 'infer':60 'json':96 'json-api' 'key':187 'like':103 'limit':190 'live':151 'lowpaymentfee.com':42 'marketplac':106 'maxamountrequir':162 'micropay':9,23 'network':82,184 'nft':1,15,36,105 'nft-floor-price' 'page':131,136 'part':45 'pay':52,197 'pay-per-cal':51,196 'pay-per-request' 'payment':74,175 'per':13,27,53,85,198 'platform':70 'post':92 'price':5,19,34,113,133 'prompt':143 'protocol':75 'pure':195 'rate':189 'request':14,28,86,93 'request/response':122 'return':31,95,138,153 'schema':123 'sent':177 'serv':104 'servic':65 'settl':76 'specif':88,110 'structur':101 'suit':49 'unit':167 'url':100 'usdc':78,169 'usdc-base' 'use':71 'util':64 'valid':155 'via':7,21 'wallet':142 'x402':8,22,73,156 'x402-payment'","prices":[{"id":"5bf68ae8-5261-4e12-a2dc-0c0748682ced","listingId":"952f3c23-207d-4b92-a570-3a909ab6fc04","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/13/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":"2026-04-18T22:29:48.279Z"}],"sources":[{"listingId":"952f3c23-207d-4b92-a570-3a909ab6fc04","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/13/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T22:29:48.279Z","lastSeenAt":"2026-04-23T00:32:38.712Z"}],"details":{"listingId":"952f3c23-207d-4b92-a570-3a909ab6fc04","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/13/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 endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/13/floor"},{"claim":"All endpoints on the platform 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":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/13/floor"}],"useCases":["Fetching the current floor price of a specific NFT collection for trading bots","Monitoring NFT collection valuations in a portfolio dashboard","Feeding floor-price data into automated bidding or listing strategies"],"bestFor":["Agents needing on-demand NFT floor prices without API key management","Micropayment-friendly workflows on Base network","Lightweight, single-call NFT data lookups"],"notFor":["Bulk historical NFT price data retrieval (no batch endpoint documented)","Users who cannot settle USDC payments on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.277Z"},"updatedAt":"2026-04-23T00:32:38.712Z"}}