{"id":"5bb2974c-1df3-497c-8538-f8b37ecba184","shortId":"cqSmSa","kind":"x402","title":"NFT collection floor-price endpoint, pay-per-call via x402 on Base (USDC).","tagline":"NFT collection floor-price endpoint, pay-per-call via x402 on Base (USDC).","description":"This endpoint at lowpaymentfee.com returns the floor price for NFT collection ID 8. It is part of a broader platform offering dozens of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all gated via the x402 payment protocol on the Base network using USDC.\n\nThe specific endpoint `/api/v1/collections/8/floor` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform's landing page confirms uniform $0.02/request pricing across all endpoints, with no API keys, no rate limits, and no minimum commitments required.\n\nNote that while the platform lists many endpoint categories (analytics, AI, finance, infrastructure), this specific listing covers only the collection floor-price endpoint. Documentation beyond the landing page is essentially empty — the /docs, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The endpoint is live and returning a valid 402 challenge, but the lack of documentation makes it difficult to know the exact request body format or response structure.","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key"],"categories":["crypto","nft"],"synonyms":["NFT floor price","collection floor price","NFT market data","x402 API","pay-per-call API","crypto collectibles data","Base USDC payment"],"warnings":["No API documentation available — /docs, /pricing, /README all return only a wallet-connect prompt","No request body schema or response schema documented anywhere","The endpoint path references 'collections/8' but there is no documentation on what collection ID 8 represents","The platform lists many endpoint categories on its landing page but none appear individually documented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/8/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/8/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 402 challenge with clear pricing. However, there is no OpenAPI spec, no request/response schema, no examples, and all documentation pages are empty stubs. The endpoint's actual data source and response format are 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'/docs':177 '/pricing':178 '/readme':180 '/request':127 '0.02':112,126 '000':101 '0x8335':106 '20':100 '2913':107 '402':215 '6':117 '8':43 'Base USDC payment' 'NFT floor price' 'NFT market data' 'accept':86 'across':129 'advertis':95 'ai':154 'ai/ml':62 'analyt':61,153 'api':58,134 'avail':206 'base':14,29,78,102,109 'base-network' 'beyond':169 'bodi':230 'broader':49 'call':10,25 'categori':152 'challeng':94,216 'collect':2,17,41,163 'collection floor price' 'commit':142 'confirm':124 'connect':186 'content':192 'cost':98 'cover':160 'crypto collectibles data' 'data':60,65 'decim':118 'difficult':224 'document':168,201,221 'dozen':52 'empti':175 'endpoint':6,21,32,84,131,151,167,208 'equal':111 'essenti':174 'exact':228 'exampl':204 'financ':155 'finance/web3':64 'floor':4,19,37,165 'floor-pric':3,18,164 'format':231 'gate':70 'id':42 'infer':63 'infrastructur':156 'json':91 'key':135 'know':226 'lack':219 'land':122,171 'limit':138 'list':149,159 'live':210 'lowpaymentfee.com':34 'make':222 'mani':150 'maximum':97 'minimum':141 'network':79 'nft':1,16,40 'nft-floor-price' 'no-api-key' 'note':144 'offer':51 'openapi':196 'page':123,172,181 'part':46 'pay':8,23,55 'pay-per-cal':7,22 'pay-per-call API' 'pay-per-request':54 'payload':205 'payment':74 'per':9,24,56,113 'platform':50,120,148 'post':87 'price':5,20,38,128,166 'prompt':188 'protocol':75 'rate':137 'render':183 'request':57,88,114,229 'request/response':199 'requir':143 'respons':233 'return':35,90,212 'schema':200 'servic':68 'span':59 'spec':197 'specif':83,158 'structur':234 'substant':191 'uniform':125 'unit':103 'usdc':15,30,81,105,115 'usdc-settlement' 'use':80,116 'util':67 'valid':214 'via':11,26,71 'wallet':187 'x402':12,27,73,93 'x402 API' 'x402-payment'","prices":[{"id":"856a202a-ae76-4621-b556-d4c5d4c4aafc","listingId":"5bb2974c-1df3-497c-8538-f8b37ecba184","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/8/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":"2026-04-19T05:29:49.353Z"}],"sources":[{"listingId":"5bb2974c-1df3-497c-8538-f8b37ecba184","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/8/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T05:29:49.353Z","lastSeenAt":"2026-04-22T01:02:00.307Z"}],"details":{"listingId":"5bb2974c-1df3-497c-8538-f8b37ecba184","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/8/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":"Uniform $0.02/request pricing, no API keys, no rate limits, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/8/floor"},{"claim":"USDC contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/collections/8/floor"}],"useCases":["Querying the current floor price of a specific NFT collection","Building NFT portfolio trackers that need real-time floor data","Automating NFT trading strategies based on floor price movements"],"bestFor":["Agents needing on-demand NFT floor prices without API key registration","Developers who want to pay per request with USDC on Base","Quick prototyping where low per-call cost and zero setup matter"],"notFor":["High-volume NFT analytics requiring bulk/batch endpoints (no documented batch support)","Users who need detailed collection metadata beyond floor price","Anyone requiring comprehensive API documentation before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.648Z"},"updatedAt":"2026-04-22T01:02:00.307Z"}}