{"id":"0e795628-93b0-4913-959b-f1e56854e447","shortId":"pbuFft","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 2. 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 with each request.\n\nThe specific endpoint `/api/v1/collections/2/floor` accepts POST requests and returns JSON. Based on the URL structure, it likely returns the current floor price for a specific NFT or token collection. The provider's site also lists endpoints for analytics, AI/ML inference (sentiment, summarization, classification, embeddings), finance (price feeds, exchange rates, token quotes, gas estimates), and utility services (geocoding, validation, conversion, generation), all at the same $0.02 price point.\n\nThe x402 challenge confirms the endpoint is live, accepting payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` in USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base. The maximum amount required is 20,000 base units, which equals $0.02 (USDC uses 6 decimals). No OpenAPI schema, detailed documentation, or example responses were found in the crawl — the docs, pricing, and API pages all returned only a \"Connect wallet\" prompt with no further content.","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response"],"categories":["finance","web3"],"synonyms":["NFT floor price","collection floor price","NFT market data","x402 API","micropayment API","Base USDC API","pay-per-call NFT data"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown","Docs, pricing, and API pages return only 'Connect wallet' with no usable content","The endpoint path references a hardcoded collection ID (2); it is unclear what collection this represents","No rate limits or SLA information documented"],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/2/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/2/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 x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response format, no example payloads, and the docs pages are empty. The specific purpose of 'collections/2/floor' is inferred from the URL path 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'0.02':13,28,64,160,192 '000':187 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':175 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':178 '2':44 '20':186 '6':195 'Base USDC API' 'NFT floor price' 'NFT market data' 'accept':100,171 'account':83 'address':174 'ai/ml':134 'also':129 'amount':183 'analyt':133 'api':57,80,214 'attach':88 'base':11,26,73,106,180,188 'base-network' 'broader':50 'call':56 'caller':86 'challeng':165 'classif':138 'collect':2,17,42,124 'collection floor price' 'confirm':166 'connect':220 'content':226 'convers':154 'crawl':209 'current':115 'data':39 'decim':196 'detail':200 'doc':211 'document':201 'embed':139 'endpoint':32,98,131,168 'equal':191 'estim':148 'exampl':203 'exchang':143 'feed':142 'financ':140 'floor':4,19,37,116 'floor-pric':3,18,36 'found':206 'gas':147 'generat':155 'geocod':152 'header':92 'id':43 'infer':135 'json':105 'json-response' 'key':81 'like':112 'list':130 'live':170 'lookup':6,21 'lowpaymentfee.com':34,60 'maximum':182 'micropay':9,24 'micropayment API' 'network':74 'nft':1,16,41,121 'nft-floor-price' 'no-api-key' 'offer':58 'openapi':198 'page':215 'part':47 'pay':54 'pay-per-cal':53 'pay-per-call NFT data' 'pay-per-request' 'payment':91,172 'per':14,29,55,65 'point':162 'post':101 'price':5,20,38,62,117,141,161,212 'prompt':222 'protocol':78 'provid':126 'quot':146 'rate':144 'request':15,30,66,95,102 'requir':85,184 'respons':204 'return':35,104,113,217 'schema':199 'sentiment':136 'servic':151 'settl':68 'simpli':87 'site':128 'specif':97,120 'structur':110 'suit':51 'summar':137 'token':123,145 'unit':189 'url':109 'usdc':70,177,193 'usdc-settlement' 'use':194 'util':150 'valid':153 'via':7,22,75 'wallet':221 'x402':8,23,77,90,164 'x402 API' 'x402-payment'","prices":[{"id":"fcc8581c-d65e-40a7-b355-5288b001c533","listingId":"0e795628-93b0-4913-959b-f1e56854e447","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/2/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":"2026-04-19T00:29:49.071Z"}],"sources":[{"listingId":"0e795628-93b0-4913-959b-f1e56854e447","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/2/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T00:29:49.071Z","lastSeenAt":"2026-04-23T00:32:38.918Z"}],"details":{"listingId":"0e795628-93b0-4913-959b-f1e56854e447","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/2/floor \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns HTTP 402 with x402 challenge requiring 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/2/floor"},{"claim":"All APIs 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 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/2/floor"}],"useCases":["Querying the current floor price of a specific NFT collection programmatically","Building trading bots or dashboards that need real-time NFT floor data","Agents that need on-demand NFT market data without managing API keys"],"bestFor":["Developers or agents needing quick NFT floor-price lookups without subscription commitments","x402-compatible agents that can pay per call in USDC on Base","Low-volume or sporadic NFT data consumers who prefer pay-as-you-go pricing"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users who need detailed collection metadata, historical prices, or trait-level data (only floor price is indicated)","Anyone without a Base-compatible USDC wallet or x402 payment capability"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.949Z"},"updatedAt":"2026-04-23T00:32:38.918Z"}}