{"id":"668f4a13-c0be-4a1b-8359-bb385c566967","shortId":"LpN6kF","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 45. It is part of a broader suite of pay-per-call APIs offered by lowpaymentfee.com, all settled via the x402 protocol on the Base network using USDC. The specific endpoint path `/api/v1/collections/45/floor` suggests it serves NFT or digital-asset collection floor prices, though the provider's landing page categorizes its offerings under Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure.\n\nPricing is $0.02 per request (20,000 base units of USDC with 6 decimals). Payment is handled inline via the x402 `exact` scheme — no API keys, no subscriptions, no rate limits. The endpoint accepts POST requests and returns `application/json`. The x402 challenge is live and well-formed, advertising payment to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base with a 300-second timeout.\n\nDocumentation is extremely thin: the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawl. The exact request body format and response structure for this specific collection-floor endpoint are unknown and must be discovered by the caller.","tags":[],"capabilities":["nft-floor-price","collection-data","x402-payment","usdc-micropayment","base-network","pay-per-request","no-api-key"],"categories":["finance","nft","data"],"synonyms":["NFT floor price API","collection floor price","NFT market data","digital asset floor","crypto collection data","x402 NFT API","micropayment data API"],"warnings":["No OpenAPI spec or schema available for request or response bodies","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no content","The specific endpoint /api/v1/collections/45/floor is not listed on the provider's landing page — it may be an unlisted or experimental route","Request body format is unknown; callers must discover it by experimentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/45/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/45/floor","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The specific endpoint path (collections/45/floor) is not mentioned on the landing page, and all doc pages return only a wallet-connect prompt. Effectively a stub 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'0.02':12,26,108 '000':112 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':158 '20':111 '300':163 '45':42 '6':118 'NFT floor price API' 'NFT market data' 'accept':139 'address':157 'advertis':154 'ai':99 'analyt':98 'api':55,130,173 'application/json':144 'asset':83 'avail':200 'base':11,25,67,113,160 'base-network' 'bodi':207 'broader':48 'call':54 'caller':227 'categor':93 'challeng':147 'collect':2,16,40,84,216 'collection floor price' 'collection-data' 'collection-floor':215 'connect':181 'content':187 'crawl':203 'crypto collection data' 'data':6,20,37,97 'decim':119 'digit':82 'digital asset floor' 'digital-asset':81 'discov':224 'doc':171 'document':166 'endpoint':30,73,138,218 'exact':127,205 'exampl':199 'extrem':168 'financ':102 'floor':4,18,35,85,217 'floor-pric':3,17,34 'form':153 'format':208 'handl':122 'id':41 'infrastructur':105 'inlin':123 'key':131 'land':91 'learn':101 'limit':136 'live':149 'lowpaymentfee.com':32,58 'machin':100 'micropay':9,23 'micropayment data API' 'must':222 'network':68 'nft':1,15,39,79 'nft-floor-price' 'no-api-key' 'offer':56,95 'openapi':191 'page':92,176 'part':45 'path':74 'pay':52 'pay-per-cal':51 'pay-per-request' 'payment':120,155 'per':13,27,53,109 'post':140 'price':5,19,36,86,106,172 'prompt':183 'protocol':64 'provid':89 'rate':135 'readm':175 'render':178 'request':14,28,110,141,206 'request/response':194 'respons':210 'return':33,143 'schema':195 'scheme':128 'second':164 'serv':78 'settl':60 'spec':192 'specif':72,214 'structur':211 'subscript':133 'suggest':76 'suit':49 'thin':169 'though':87 'timeout':165 'unit':114 'unknown':220 'usag':198 'usdc':70,116 'usdc-micropayment' 'use':69 'via':7,21,61,124 'wallet':182 'web3':103 'well':152 'well-form':151 'x402':8,22,63,126,146 'x402 NFT API' 'x402-payment'","prices":[{"id":"764d0caa-e826-4abc-b0ba-3d52b8614b99","listingId":"668f4a13-c0be-4a1b-8359-bb385c566967","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/45/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":"2026-04-19T05:29:53.459Z"}],"sources":[{"listingId":"668f4a13-c0be-4a1b-8359-bb385c566967","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/45/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T05:29:53.459Z","lastSeenAt":"2026-04-22T23:02:26.903Z"}],"details":{"listingId":"668f4a13-c0be-4a1b-8359-bb385c566967","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/45/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 402 with x402 challenge advertising USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/collections/45/floor"},{"claim":"Pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Payment asset is USDC at contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/45/floor"},{"claim":"maxAmountRequired is 20000 base units (= $0.02 with 6 decimals)","source_url":"https://lowpaymentfee.com/api/v1/collections/45/floor"}],"useCases":["Fetching real-time floor prices for NFT collections to inform trading decisions","Building dashboards or bots that monitor NFT collection valuations","Integrating NFT floor-price feeds into agent workflows without managing API keys"],"bestFor":["Agents or apps needing on-demand NFT floor prices without subscription overhead","Developers who want crypto-native pay-per-call data access on Base","Low-volume or bursty access patterns where per-request pricing is economical"],"notFor":["High-volume consumers who need bulk NFT data at lower marginal cost","Users who need detailed collection metadata, traits, or historical sales beyond floor price"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.406Z"},"updatedAt":"2026-04-22T23:02:26.903Z"}}