{"id":"9a82609d-c171-4fab-856e-f7fb31ac3f42","shortId":"HSR5ZW","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 31. 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, and utility services. All endpoints use the x402 payment protocol, settling in USDC on the Base network at $0.02 per request.\n\nThe specific endpoint `/api/v1/collections/31/floor` accepts POST requests and returns JSON. The x402 challenge confirms the endpoint is live, advertising a max amount of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the `exact` scheme to the provider's wallet. No API keys or rate limits are advertised; access is gated purely by the x402 micropayment.\n\nDocumentation is extremely sparse. The provider's docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no example payloads available. The endpoint path suggests it returns floor-price information for a specific NFT collection, but the exact response format and any accepted request parameters are unknown.","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-base","pay-per-request","json-api","collection-data"],"categories":["crypto","nft","data"],"synonyms":["NFT floor price","collection floor price","NFT market data","x402 NFT API","Base USDC micropayment","NFT collection stats","floor price lookup"],"warnings":["No OpenAPI or schema documentation available — request parameters and response format are unknown","All doc/pricing/README pages render only 'Connect wallet' with no technical content","The specific collection ID 31 is hardcoded in the path; it is unclear what collection this refers to or whether other collection IDs are supported","No rate-limit or SLA information provided"],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/31/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/31/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 OpenAPI spec, no request/response schema, no examples, and all documentation pages are empty beyond a wallet-connect prompt. The endpoint's exact behavior must be inferred from its URL path 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'0.02':12,26,85,123 '000':112 '0x8335':117 '20':111 '2913':118 '31':42 '6':127 'Base USDC micropayment' 'NFT collection stats' 'NFT floor price' 'NFT market data' 'accept':92,218 'access':149 'addit':179 'advertis':106,148 'ai/ml':64 'amount':109 'analyt':63 'api':55,142,165 'avail':195 'base':11,25,82,113,120 'broader':48 'call':54 'challeng':100 'collect':2,16,40,210 'collection floor price' 'collection-data' 'confirm':101 'connect':174 'data':6,20,37,62 'decim':128 'detail':181 'doc':164 'document':157,190 'endpoint':30,71,90,103,197 'equal':122 'exact':134,213 'exampl':193 'extrem':159 'finance/web3':66 'floor':4,18,35,203 'floor price lookup' 'floor-pric':3,17,34,202 'format':215 'gate':151 'given':124 'id':41 'infer':65 'inform':205 'json':97 'json-api' 'key':143 'limit':146 'live':105 'lowpaymentfee.com':32 'made':131 'max':108 'micropay':9,23,156 'network':83 'nft':1,15,39,209 'nft-floor-price' 'offer':56 'openapi':185 'page':169 'paramet':220 'part':45 'path':198 'pay':52 'pay-per-cal':51 'pay-per-request' 'payload':194 'payment':75,129 'per':13,27,53,86 'post':93 'price':5,19,36,166,204 'prompt':176 'protocol':76 'provid':60,138,162 'pure':152 'rate':145 'readm':168 'render':171 'request':14,28,87,94,219 'request/response':188 'respons':214 'return':33,96,201 'schema':189 'scheme':135 'servic':69 'settl':77 'span':61 'spars':160 'spec':186 'specif':89,208 'suggest':199 'suit':49 'technic':180 'unit':114 'unknown':222 'usdc':79,116,125 'usdc-base' 'use':72 'util':68 'via':7,21,132 'wallet':140,175 'x402':8,22,74,99,155 'x402 NFT API' 'x402-payment'","prices":[{"id":"e3ac7f6b-8e09-44b9-b28e-853040addda7","listingId":"9a82609d-c171-4fab-856e-f7fb31ac3f42","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/31/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":"2026-04-18T23:59:54.776Z"}],"sources":[{"listingId":"9a82609d-c171-4fab-856e-f7fb31ac3f42","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/31/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T23:59:54.776Z","lastSeenAt":"2026-04-23T00:32:38.882Z"}],"details":{"listingId":"9a82609d-c171-4fab-856e-f7fb31ac3f42","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/31/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 HTTP 402 with an x402 challenge advertising 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/31/floor"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/collections/31/floor"},{"claim":"All APIs 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":"The provider offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Querying the current floor price of a specific NFT collection for trading bots","Monitoring NFT collection valuations in automated dashboards","Integrating floor-price data into agent workflows that settle payments on Base"],"bestFor":["Agents or bots needing on-demand NFT floor-price data without API key management","Developers who want pay-per-call pricing with no subscription commitment","x402-compatible clients settling micropayments in USDC on Base"],"notFor":["Users needing bulk historical NFT data (no batch or historical endpoints documented)","Anyone requiring detailed documentation or guaranteed SLAs before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.053Z"},"updatedAt":"2026-04-23T00:32:38.882Z"}}