{"id":"8e61b767-be9a-495e-bb9b-395a57a5e289","shortId":"NVUgt5","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 30. It is part of a broader suite of x402-enabled APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3, and utility services. All endpoints share a uniform $0.02-per-request pricing model settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/collections/30/floor` accepts POST requests and is gated by the x402 payment protocol (version 1). The payment challenge requires up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) sent to the provider's wallet on Base. No API keys or rate limits are advertised; access is granted per-request upon valid payment. The response MIME type is `application/json`.\n\nDocumentation beyond the landing page is sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The endpoint is confirmed live (402 challenge captured), but the actual response structure and the meaning of \"collection 30\" are not documented.","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-base","per-request-micropayment","json-api"],"categories":["finance","nft","web3"],"synonyms":["NFT floor price","collection floor price","NFT market data","crypto collectibles pricing","x402 NFT API","Base USDC API"],"warnings":["No OpenAPI or schema documentation available — response format is unknown.","All documentation pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no content.","The meaning of 'collections/30' (which NFT collection) is not documented anywhere.","No request body schema or example response is available; callers must discover behavior empirically."],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/30/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/30/floor","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no examples, and the docs pages are empty. The purpose of 'collection 30' is undocumented. This is effectively a stub 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'/api/v1/collections/30/floor':90 '/docs':162 '/pricing':163 '/readme':166 '0.02':12,26,74,116 '000':111 '1':103 '20':110 '30':42,212 '402':199 '6':121 'Base USDC API' 'NFT floor price' 'NFT market data' 'accept':91 'access':139 'actual':204 'addit':177 'advertis':138 'ai/ml':63 'analyt':62 'api':54,132 'application/json':153 'avail':193 'base':11,25,85,112,130 'beyond':155 'broader':48 'captur':201 'challeng':106,200 'collect':2,16,40,211 'collection floor price' 'confirm':197 'connect':172 'crypto collectibles pricing' 'data':6,20,37,61 'decim':122 'detail':179 'document':154,188,215 'enabl':53 'endpoint':30,70,89,195 'exampl':191 'finance/web3':65 'floor':4,18,35 'floor-pric':3,17,34 'gate':96 'grant':141 'id':41 'infer':64 'json-api' 'key':133 'land':157 'limit':136 'live':198 'lowpaymentfee.com':32 'mean':209 'micropay':9,23 'mime':150 'model':79 'network':86 'nft':1,15,39 'nft-floor-price' 'offer':55 'openapi':183 'page':158,167 'part':45 'payload':192 'payment':100,105,147 'per':13,27,76,143 'per-request':75,142 'per-request-micropayment' 'post':92 'price':5,19,36,78 'prompt':174 'protocol':101 'provid':59,126 'rate':135 'render':169 'request':14,28,77,93,144 'request/response':186 'requir':107 'respons':149,205 'return':33 'schema':187 'sent':123 'servic':68 'settl':80 'share':71 'sinc':118 'span':60 'spars':160 'spec':184 'specif':88 'structur':206 'suit':49 'technic':178 'type':151 'uniform':73 'unit':113 'upon':145 'usd':117 'usdc':82,115,119 'usdc-base' 'use':120 'util':67 'valid':146 'version':102 'via':7,21 'wallet':128,173 'x402':8,22,52,99 'x402 NFT API' 'x402-enabled':51 'x402-payment'","prices":[{"id":"ca836f68-3016-460d-9713-adebda7a5895","listingId":"8e61b767-be9a-495e-bb9b-395a57a5e289","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/30/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":"2026-04-19T00:29:51.489Z"}],"sources":[{"listingId":"8e61b767-be9a-495e-bb9b-395a57a5e289","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/30/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T00:29:51.489Z","lastSeenAt":"2026-04-23T00:32:39.026Z"}],"details":{"listingId":"8e61b767-be9a-495e-bb9b-395a57a5e289","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/30/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 up to 20,000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/30/floor"},{"claim":"Provider advertises $0.02 per request, no API keys, no rate limits, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/collections/30/floor"}],"useCases":["Fetching real-time NFT collection floor prices for trading bots","Integrating NFT floor-price feeds into portfolio dashboards","Automated agents purchasing market data without API keys"],"bestFor":["Agents or bots that need on-demand NFT floor prices without subscription commitments","Developers wanting keyless, pay-per-call NFT data on Base","x402-compatible wallets and agent frameworks"],"notFor":["Users needing bulk historical NFT price data (no batch/export documented)","Projects requiring detailed collection metadata beyond floor price","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.873Z"},"updatedAt":"2026-04-23T00:32:39.026Z"}}