{"id":"c727d583-4591-4afa-94d9-256879820de6","shortId":"nfkWdt","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 the floor price for NFT collection ID 40 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 data, and utility services. All endpoints on the platform use the x402 protocol for payment, settling in USDC on the Base network.\n\nThe specific endpoint `/api/v1/collections/40/floor` is not explicitly listed on the provider's landing page among the advertised API categories, but the x402 challenge is live and returns a valid 402 response. The payment required is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The endpoint accepts POST requests and returns JSON.\n\nDocumentation is extremely sparse — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what fields the response contains or what parameters the request accepts. The collection ID 40 is hardcoded in the URL path, and it is unclear what collection it refers to or whether other collection IDs are available. Use with caution given the lack of documentation.","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-base","pay-per-request","json-api"],"categories":["crypto","nft"],"synonyms":["NFT floor price","collection floor","NFT pricing API","floor price lookup","crypto collectibles price","NFT market data"],"warnings":["No documentation available for this endpoint; docs/pricing/API pages only show 'Connect wallet'","This specific endpoint (/api/v1/collections/40/floor) is not listed among the provider's advertised APIs","No OpenAPI schema or response examples available — request and response formats are unknown","Collection ID 40 is unexplained; unclear what NFT collection it refers to or what other IDs exist"],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/40/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/40/floor","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is zero documentation for this specific endpoint — no request schema, no response schema, no examples, and the endpoint isn't even listed on the provider's landing page. The collection ID 40 is 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'0.02':12,26,136 '000':125 '0x8335':130 '20':124 '2913':131 '40':39,197 '402':118 '6':140 'NFT floor price' 'NFT market data' 'NFT pricing API' 'accept':144,193 'advertis':105 'ai/ml':64 'among':103 'analyt':63 'api':55,106,158 'avail':219 'base':11,25,87,126,133 'broader':48 'call':54 'categori':107 'caution':222 'challeng':111 'collect':2,16,37,195,209,216 'collection floor' 'connect':164 'contain':187 'content':170 'crypto collectibles price' 'data':62,67 'decim':141 'descript':181 'doc':155 'document':150,227 'endpoint':30,72,91,143 'equal':135 'exampl':178 'explicit':95 'extrem':152 'field':184 'finance/web3':66 'floor':4,18,33 'floor price lookup' 'floor-pric':3,17 'given':137,223 'hardcod':199 'host':40 'id':38,196,217 'infer':65 'json':149 'json-api' 'lack':225 'land':101 'list':96 'live':113 'lookup':6,20 'lowpaymentfee.com':42 'micropay':9,23 'network':88 'nft':1,15,36 'nft-floor-price' 'offer':56 'openapi':174 'page':102,159 'paramet':190 'part':45 'path':203 'pay':52 'pay-per-cal':51 'pay-per-request' 'payment':81,121 'per':13,27,53 'platform':75 'post':145 'price':5,19,34,156 'prompt':166 'protocol':79 'provid':60,99 'refer':211 'render':161 'request':14,28,146,192 'request/response':177 'requir':122 'respons':119,186 'return':31,115,148 'schema':175 'servic':70 'settl':82 'span':61 'spars':153 'specif':90 'suit':49 'unclear':207 'unit':127 'url':202 'usdc':84,129,138 'usdc-base' 'use':76,220 'util':69 'valid':117 'via':7,21 'wallet':165 'whether':214 'x402':8,22,78,110 'x402-payment'","prices":[{"id":"49f2f4b5-3a03-4f05-8574-f178f6e651f7","listingId":"c727d583-4591-4afa-94d9-256879820de6","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/40/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":"2026-04-19T05:29:47.574Z"}],"sources":[{"listingId":"c727d583-4591-4afa-94d9-256879820de6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/40/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T05:29:47.574Z","lastSeenAt":"2026-04-22T01:02:00.224Z"}],"details":{"listingId":"c727d583-4591-4afa-94d9-256879820de6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/40/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 x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/collections/40/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"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/40/floor"}],"useCases":["Querying the current floor price of a specific NFT collection programmatically","Building trading bots that monitor NFT floor prices","Integrating NFT market data into dashboards or analytics tools"],"bestFor":["Agents needing on-demand NFT floor price data without API key management","Developers who prefer pay-per-call micropayments over subscription billing","Automated workflows on Base that can settle USDC payments natively"],"notFor":["Users who need comprehensive NFT metadata or historical price charts","High-frequency polling where $0.02 per call would accumulate significant cost","Anyone requiring detailed documentation or guaranteed SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.672Z"},"updatedAt":"2026-04-22T01:02:00.224Z"}}