{"id":"efe9f8f3-6c1c-4e46-98ef-50d0a0e75333","shortId":"ArqXH6","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 returns floor-price data for NFT collection #34 via the x402 payment protocol. It is part of a broader API platform at lowpaymentfee.com that offers data & analytics, AI/ML inference, finance/Web3, and infrastructure utility endpoints — all gated behind x402 micropayments settled in USDC on the Base network.\n\nThe specific resource at `/api/v1/collections/34/floor` accepts POST requests and returns JSON. Each call costs a maximum of 0.02 USDC (20,000 base units of USDC with 6 decimals). Payment is made inline via the x402 `X-PAYMENT` header — no API keys, accounts, or rate limits are required. The payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout window.\n\nDocumentation beyond the landing page is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no example request/response payloads, and no description of what collection #34 actually is or what fields the response contains. The endpoint is confirmed live (returns a proper 402 challenge), but the lack of documentation makes it difficult to assess data quality or response schema.","tags":[],"capabilities":["nft-floor-price","x402-micropayment","usdc-payment","base-network","json-api","no-api-key","per-request-billing"],"categories":["finance","nft","web3"],"synonyms":["NFT floor price","collection floor price","NFT market data","x402 API","micropayment API","Base USDC API","NFT pricing"],"warnings":["No OpenAPI or schema documentation available — response format is unknown","All documentation pages (/docs, /api, /pricing, /README) return only a 'Connect wallet' prompt with no content","Collection #34 is not identified — unclear what NFT collection this floor price refers to","No example responses available to verify data quality or structure","The broader platform lists many endpoints (AI, analytics, finance, etc.) all at $0.02 — unclear whether all are fully functional or placeholders"],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/34/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/34/floor","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no examples, and no information about what collection #34 represents. Documentation pages are effectively empty. This is a stub-level 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'/api/v1/collections/34/floor':82 '/docs':148 '/pricing':150 '/readme':152 '0.02':12,26,95 '000':98 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':132 '20':97 '300':135 '34':39,181 '402':198 '6':104 'Base USDC API' 'NFT floor price' 'NFT market data' 'NFT pricing' 'accept':83 'account':120 'actual':182 'addit':163 'address':131 'ai/ml':59 'analyt':58 'api':51,118 'assess':209 'base':11,25,76,99 'base-network' 'behind':68 'beyond':140 'broader':50 'call':90 'challeng':199 'collect':2,16,38,180 'collection floor price' 'confirm':193 'connect':158 'contain':189 'cost':91 'data':6,20,35,57,210 'decim':105 'descript':177 'detail':165 'difficult':207 'document':139,204 'endpoint':30,65,191 'exampl':172 'extrem':145 'field':186 'finance/web3':61 'floor':4,18,33 'floor-pric':3,17,32 'gate':67 'header':116 'infer':60 'infrastructur':63 'inlin':109 'json':88 'json-api' 'key':119 'lack':202 'land':142 'limit':123 'live':194 'lowpaymentfee.com':54 'made':108 'make':205 'maximum':93 'micropay':9,23,70 'micropayment API' 'network':77 'nft':1,15,37 'nft-floor-price' 'no-api-key' 'offer':56 'openapi':169 'page':143,153 'part':47 'payload':174 'payment':43,106,115,127 'per':13,27 'per-request-billing' 'platform':52 'post':84 'price':5,19,34 'prompt':160 'proper':197 'protocol':44 'qualiti':211 'rate':122 'render':155 'request':14,28,85 'request/response':173 'requir':125 'resourc':80 'respons':188,213 'return':31,87,195 'schema':214 'second':136 'sent':129 'settl':71 'spars':146 'spec':170 'specif':79 'technic':164 'timeout':137 'unit':100 'usdc':73,96,102 'usdc-payment' 'util':64 'via':7,21,40,110 'wallet':159 'window':138 'x':114 'x-payment':113 'x402':8,22,42,69,112 'x402 API' 'x402-micropayment'","prices":[{"id":"721c8177-7148-46c0-87ba-575402724622","listingId":"efe9f8f3-6c1c-4e46-98ef-50d0a0e75333","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/34/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":"2026-04-19T05:29:48.778Z"}],"sources":[{"listingId":"efe9f8f3-6c1c-4e46-98ef-50d0a0e75333","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/34/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T05:29:48.778Z","lastSeenAt":"2026-04-22T23:02:26.726Z"}],"details":{"listingId":"efe9f8f3-6c1c-4e46-98ef-50d0a0e75333","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/34/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":"Endpoint returns 402 with x402 challenge requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/collections/34/floor"},{"claim":"Maximum amount required is 20000 base units of USDC (0.02 USD) with asset contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/collections/34/floor"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Payment timeout is 300 seconds, payTo address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","source_url":"https://lowpaymentfee.com/api/v1/collections/34/floor"}],"useCases":["Fetching real-time floor prices for NFT collections","Building NFT portfolio trackers that need floor-price feeds","Automated trading bots that monitor NFT collection valuations","Agent-driven workflows that need on-demand NFT market data"],"bestFor":["Developers needing low-cost, keyless NFT floor-price lookups","AI agents that can settle x402 payments on Base","Projects that want pay-per-call pricing without subscriptions"],"notFor":["Users who need bulk historical NFT price data (no batch endpoint documented)","Anyone without a Base-compatible USDC wallet for x402 settlement","Use cases requiring detailed collection metadata beyond floor price"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.611Z"},"updatedAt":"2026-04-22T23:02:26.726Z"}}