{"id":"3ab2f50b-b018-4a15-9b88-b101d7e36d6d","shortId":"vNeKbX","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 at lowpaymentfee.com returns the floor price for NFT collection ID 38. It is part of a broader platform offering pay-per-call APIs across data analytics, AI/ML, finance/Web3, and utility categories, all settled via the x402 protocol on the Base network using USDC.\n\nThe specific endpoint `/api/v1/collections/38/floor` accepts POST requests and is gated by an x402 payment challenge. The maximum amount required is 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base), which equals $0.02 USD (USDC uses 6 decimals). Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds. No API keys or rate limits are advertised; access is instant once payment is included in the X-PAYMENT header.\n\nDocumentation is extremely sparse — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI schema, no response examples, and no description of what fields the floor-price response contains. The endpoint is confirmed live (returns 402 with a valid x402 challenge), but the actual response payload structure is unknown.","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-micropayment","base-network","pay-per-request","no-api-key"],"categories":["nft","finance","web3"],"synonyms":["NFT floor price","collection floor price","NFT collection data","floor price API","NFT market data","crypto collectibles pricing"],"warnings":["No documentation available — docs, pricing, and API pages only show 'Connect wallet'","No OpenAPI or response schema provided; response payload structure is unknown","Collection ID 38 is not identified — unclear which NFT collection this covers","No robots.txt or agents.txt present"],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/38/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/38/floor","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, there is no OpenAPI schema, no response examples, no documentation beyond a wallet-connect prompt, and the specific collection (ID 38) is not described. The actual response format is entirely 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'0.02':12,26,106 '000':96 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':117 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':101 '20':95 '300':122 '38':41 '402':193 '6':110 'NFT collection data' 'NFT floor price' 'NFT market data' 'accept':79 'access':132 'across':55 'actual':201 'address':116 'advertis':131 'ai/ml':58 'amount':92 'analyt':57 'api':54,125,153 'base':11,25,71,97,103 'base-network' 'broader':47 'call':53 'categori':62 'challeng':89,198 'collect':2,16,39 'collection floor price' 'confirm':190 'connect':159 'contain':186 'crypto collectibles pricing' 'data':56 'decim':111 'descript':177 'detail':166 'doc':150 'document':145 'endpoint':30,77,188 'equal':105 'exampl':174 'extrem':147 'field':180 'finance/web3':59 'floor':4,18,35,183 'floor price API' 'floor-pric':3,17,182 'gate':84 'header':144 'id':40 'includ':138 'instant':134 'key':126 'limit':129 'live':191 'lookup':6,20 'lowpaymentfee.com':32 'maximum':91 'micropay':9,23 'network':72 'nft':1,15,38 'nft-floor-price' 'no-api-key' 'offer':49 'openapi':170 'page':154 'part':44 'pay':51 'pay-per-cal':50 'pay-per-request' 'payload':203 'payment':88,112,136,143 'per':13,27,52 'platform':48 'post':80 'price':5,19,36,151,184 'prompt':161 'protocol':68 'rate':128 'render':156 'request':14,28,81 'requir':93 'respons':173,185,202 'return':33,192 'schema':171 'second':123 'sent':114 'settl':64 'spars':148 'specif':76 'structur':204 'technic':165 'timeout':120 'unit':98 'unknown':206 'usd':107 'usdc':74,100,108 'usdc-micropayment' 'use':73,109 'util':61 'valid':196 'via':7,21,65 'wallet':160 'x':142 'x-payment':141 'x402':8,22,67,87,197 'x402-payment'","prices":[{"id":"3b4fcd8d-6888-494c-a270-67b9e9237664","listingId":"3ab2f50b-b018-4a15-9b88-b101d7e36d6d","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/38/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":"2026-04-19T05:29:48.179Z"}],"sources":[{"listingId":"3ab2f50b-b018-4a15-9b88-b101d7e36d6d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/38/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T05:29:48.179Z","lastSeenAt":"2026-04-23T00:32:39.222Z"}],"details":{"listingId":"3ab2f50b-b018-4a15-9b88-b101d7e36d6d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/38/floor \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/38/floor"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/collections/38/floor"}],"useCases":["Fetching the current floor price of a specific NFT collection for trading bots","Monitoring NFT collection valuations in automated dashboards","Integrating NFT floor-price data into portfolio trackers without managing API keys"],"bestFor":["Agents or bots that need on-demand NFT floor prices without subscription commitments","Developers prototyping NFT analytics with minimal setup","x402-native workflows on the Base network"],"notFor":["Bulk historical NFT price data retrieval (no batch or historical endpoints documented)","Users who need detailed collection metadata beyond floor price","Applications requiring free or ad-supported data access"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.679Z"},"updatedAt":"2026-04-23T00:32:39.222Z"}}