{"id":"35e14ef3-f94c-481f-ba0e-68e392cb637e","shortId":"ysZddJ","kind":"x402","title":"NFT collection floor-price endpoint, pay-per-call via x402 on Base with USDC.","tagline":"NFT collection floor-price endpoint, pay-per-call via x402 on Base with USDC.","description":"This endpoint at lowpaymentfee.com returns the floor price for NFT collection #42. It is part of a broader platform offering dozens of pay-per-request API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services — all settled via the x402 protocol on the Base network using USDC.\n\nThe specific endpoint `/api/v1/collections/42/floor` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform's landing page confirms a flat $0.02/request pricing model across all endpoints, with no API keys, no rate limits, and no minimum commitments required.\n\nNote that while the platform lists many endpoint categories (analytics, AI, finance, infrastructure), this specific listing covers only the `/api/v1/collections/42/floor` path. No OpenAPI schema, detailed documentation, or example responses were available from the crawled pages — the docs, pricing, and API pages all returned only a \"Connect wallet\" prompt with no substantive content. The actual response format and fields returned by this endpoint are unknown.","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-settlement","base-network","pay-per-request","json-response"],"categories":["finance","nft"],"synonyms":["NFT floor price","collection floor price","NFT market data","floor price API","Web3 data API","NFT collection data"],"warnings":["No OpenAPI or response schema available — response format is unknown","Documentation pages (/docs, /pricing, /api, /README) all returned only 'Connect wallet' with no content","The endpoint path suggests collection ID 42 is hardcoded; it is unclear if other collection IDs are supported","No examples of actual response data were found in any crawled material"],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/42/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/42/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 (402 challenge captured) and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI schema, no documentation, no example responses, and no description of what fields the response contains. The docs pages returned only wallet-connect prompts. This is effectively a stub 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'/request':129 '0.02':113,128 '000':102 '0x8335':107 '20':101 '2913':108 '42':44 '6':118 'NFT collection data' 'NFT floor price' 'NFT market data' 'Web3 data API' 'accept':87 'across':132 'actual':200 'advertis':96 'ai':157 'ai/ml':64 'analyt':63,156 'api':59,137,186 'avail':177 'base':14,30,79,103,110 'base-network' 'broader':50 'call':10,26 'categori':155 'challeng':95 'collect':2,18,43 'collection floor price' 'commit':145 'confirm':125 'connect':192 'content':198 'cost':99 'cover':163 'crawl':180 'data':62,67 'decim':119 'detail':171 'doc':183 'document':172 'dozen':53 'endpoint':6,22,34,60,85,134,154,208 'equal':112 'exampl':174 'field':204 'financ':158 'finance/web3':66 'flat':127 'floor':4,20,39 'floor price API' 'floor-pric':3,19 'format':202 'infer':65 'infrastructur':159 'json':92 'json-response' 'key':138 'land':123 'limit':141 'list':152,162 'lowpaymentfee.com':36 'mani':153 'maximum':98 'minimum':144 'model':131 'network':80 'nft':1,17,42 'nft-floor-price' 'note':147 'offer':52 'openapi':169 'page':124,181,187 'part':47 'path':167 'pay':8,24,56 'pay-per-cal':7,23 'pay-per-request':55 'per':9,25,57,114 'platform':51,121,151 'post':88 'price':5,21,40,130,184 'prompt':194 'protocol':76 'rate':140 'request':58,89,115 'requir':146 'respons':175,201 'return':37,91,189,205 'schema':170 'servic':70 'settl':72 'span':61 'specif':84,161 'substant':197 'unit':104 'unknown':210 'usdc':16,32,82,106,116 'usdc-settlement' 'use':81,117 'util':69 'via':11,27,73 'wallet':193 'x402':12,28,75,94 'x402-payment'","prices":[{"id":"6983e82b-8e20-42b5-9138-5e3b49e888c5","listingId":"35e14ef3-f94c-481f-ba0e-68e392cb637e","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/42/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":"2026-04-19T05:29:53.472Z"}],"sources":[{"listingId":"35e14ef3-f94c-481f-ba0e-68e392cb637e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/42/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T05:29:53.472Z","lastSeenAt":"2026-04-22T23:02:26.930Z"}],"details":{"listingId":"35e14ef3-f94c-481f-ba0e-68e392cb637e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/42/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":"Flat $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/42/floor"},{"claim":"Platform 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 programmatically","Building NFT portfolio dashboards that need real-time floor data","Automated trading bots that monitor NFT collection floors"],"bestFor":["Agents needing on-demand NFT floor prices without API key management","Low-volume, pay-as-you-go NFT data queries","x402-compatible autonomous agents on Base"],"notFor":["High-frequency bulk NFT data ingestion (no documented batch endpoints)","Users who need detailed collection metadata beyond floor price","Anyone requiring documented response schemas before integration"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.421Z"},"updatedAt":"2026-04-22T23:02:26.930Z"}}