{"id":"798ce1c9-b59f-46ec-bf7a-f5659260524e","shortId":"AMPKNw","kind":"x402","title":"NFT collection floor-price lookup via x402 micropayment on Base, $0.02 per request.","tagline":"NFT collection floor-price lookup via x402 micropayment on Base, $0.02 per request.","description":"This endpoint returns floor-price data for NFT collection ID 27 hosted on lowpaymentfee.com. It is part of a broader suite of pay-per-call APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3 market data, and utility services. All endpoints on the platform use the x402 protocol for payment, settling in USDC on the Base network at $0.02 per request.\n\nThe specific endpoint `/api/v1/collections/27/floor` accepts POST requests and returns JSON. Based on the URL structure, it likely provides the current floor price for a particular NFT or token collection (collection 27). However, the provider does not publish detailed documentation for this specific route — the crawled docs, pricing, and README pages all returned only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what collection 27 represents.\n\nPayment is handled via the x402 exact-payment scheme. The challenge advertises a maxAmountRequired of 20,000 base units of USDC (contract 0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. No API keys or rate limits are advertised. The endpoint is live and returning a proper 402 challenge.","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-base","pay-per-request","collection-data","json-api"],"categories":["finance","web3","nft"],"synonyms":["NFT floor price","collection floor","NFT collection data","floor price API","crypto collectibles","NFT market data","x402 NFT API"],"warnings":["No documentation available — docs, pricing, and README pages all return only 'Connect wallet' with no content.","No OpenAPI or JSON schema describing request parameters or response format.","Collection 27 is unidentified — it is unclear what NFT collection this refers to.","This specific endpoint (/api/v1/collections/27/floor) is not listed on the provider's homepage among their advertised APIs, raising questions about its status."],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/27/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/27/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 with clear pricing, but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what collection 27 is. The crawled docs/pricing/README pages were all empty beyond a wallet-connect prompt. This is effectively a stub 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'0.02':12,26,92,201 '000':189 '0x8335':195 '20':188 '27':40,125,170 '2913':196 '402':223 '6':205 'NFT collection data' 'NFT floor price' 'NFT market data' 'accept':99 'advertis':184,214 'ai/ml':65 'analyt':64 'api':56,208 'base':11,25,89,105,190,198 'broader':49 'call':55 'challeng':183,224 'collect':2,16,38,123,124,169 'collection floor' 'collection-data' 'connect':149 'content':155 'contract':194 'crawl':139 'crypto collectibles' 'current':114 'data':35,63,69 'decim':206 'descript':166 'detail':132 'doc':140 'document':133 'endpoint':30,74,97,216 'equal':200 'exact':179 'exact-pay':178 'exampl':163 'finance/web3':67 'floor':4,18,33,115 'floor price API' 'floor-pric':3,17,32 'given':202 'handl':174 'host':41 'howev':126 'id':39 'infer':66 'json':104 'json-api' 'key':209 'like':111 'limit':212 'live':218 'lookup':6,20 'lowpaymentfee.com':43 'market':68 'maxamountrequir':186 'micropay':9,23 'network':90 'nft':1,15,37,120 'nft-floor-price' 'offer':57 'openapi':159 'page':144 'part':46 'particular':119 'pay':53 'pay-per-cal':52 'pay-per-request' 'payment':83,172,180 'per':13,27,54,93 'platform':77 'post':100 'price':5,19,34,116,141 'prompt':151 'proper':222 'protocol':81 'provid':61,112,128 'publish':131 'rate':211 'readm':143 'repres':171 'request':14,28,94,101 'request/response':162 'return':31,103,146,220 'rout':137 'schema':160 'scheme':181 'servic':72 'settl':84 'span':62 'specif':96,136 'structur':109 'suit':50 'token':122 'unit':191 'url':108 'usdc':86,193,203 'usdc-base' 'use':78 'util':71 'via':7,21,175 'wallet':150 'x402':8,22,80,177 'x402 NFT API' 'x402-payment'","prices":[{"id":"45d92518-7a8b-4640-a720-c81b7cdfe793","listingId":"798ce1c9-b59f-46ec-bf7a-f5659260524e","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/27/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":"2026-04-19T00:59:35.230Z"}],"sources":[{"listingId":"798ce1c9-b59f-46ec-bf7a-f5659260524e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/27/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T00:59:35.230Z","lastSeenAt":"2026-04-23T00:32:39.082Z"}],"details":{"listingId":"798ce1c9-b59f-46ec-bf7a-f5659260524e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/27/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 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/27/floor"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/collections/27/floor"},{"claim":"All APIs 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"}],"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 compare floor prices across collections before making purchase decisions"],"bestFor":["Developers needing on-demand NFT floor prices without API key management","AI agents that can settle x402 micropayments on Base","Low-volume or sporadic queries where per-call pricing is more economical than a subscription"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users who need bulk historical floor-price data (endpoint appears to return current state only)","Anyone unable to settle USDC payments on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.899Z"},"updatedAt":"2026-04-23T00:32:39.082Z"}}