{"id":"34cb7cc5-e519-4c9e-b982-4de164b424eb","shortId":"shCX4s","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 ID 29 hosted on lowpaymentfee.com. It is part of a broader suite of x402-gated APIs offered by the same provider, spanning data analytics, AI/ML inference, finance/Web3, and utility services. All endpoints on the platform share a uniform $0.02-per-request pricing model settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/collections/29/floor` accepts POST requests and is protected by the x402 payment protocol (version 1). A valid `X-PAYMENT` header containing a signed USDC payment of up to 20,000 base units ($0.02, since USDC uses 6 decimals) is required. Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base mainnet using the USDC contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`. The response MIME type is `application/json`.\n\nDocumentation beyond the landing page is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no example request/response payloads, and no description of what fields the floor-price response contains. The endpoint is live (returns a proper 402 challenge), but the lack of documentation makes it difficult to know the exact response schema or what collection ID 29 refers to.","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-micropayment","base-network","collection-data","json-api"],"categories":["crypto","nft","data"],"synonyms":["NFT floor price","collection floor price","NFT market data","floor price API","NFT collection data","crypto collectibles pricing"],"warnings":["No OpenAPI or schema documentation available for this endpoint.","Response payload structure is completely unknown — no examples or field descriptions found.","Collection ID 29 is not identified; it is unclear which NFT collection this refers to.","All documentation pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no content.","The broader platform lists many endpoints but none have documented schemas; quality of underlying data is unverifiable."],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/29/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/29/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 and returns a well-formed x402 challenge with clear pricing, but there is no OpenAPI spec, no documentation of request parameters or response schema, no example payloads, and no indication of what collection 29 actually is. The /docs and other pages are empty beyond a wallet-connect 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'/api/v1/collections/29/floor':94 '/docs':163 '/pricing':164 '/readme':167 '0.02':12,26,78,126 '000':123 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':139 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':147 '1':107 '20':122 '29':40,229 '402':209 '6':130 'NFT collection data' 'NFT floor price' 'NFT market data' 'accept':95 'address':138 'ai/ml':64 'analyt':63 'api':55 'application/json':153 'base':11,25,89,124,141 'base-network' 'beyond':155 'broader':49 'challeng':210 'collect':2,16,38,227 'collection floor price' 'collection-data' 'connect':173 'contain':114,201 'contract':146 'crypto collectibles pricing' 'data':6,20,35,62 'decim':131 'descript':192 'detail':180 'difficult':218 'document':154,215 'endpoint':30,71,93,203 'exact':222 'exampl':187 'extrem':160 'field':195 'finance/web3':66 'floor':4,18,33,198 'floor price API' 'floor-pric':3,17,32,197 'gate':54 'header':113 'host':41 'id':39,228 'infer':65 'json-api' 'know':220 'lack':213 'land':157 'live':205 'lowpaymentfee.com':43 'mainnet':142 'make':216 'micropay':9,23 'mime':150 'model':83 'network':90 'nft':1,15,37 'nft-floor-price' 'offer':56 'openapi':184 'page':158,168 'part':46 'payload':189 'payment':104,112,118,134 'per':13,27,80 'per-request':79 'platform':74 'post':96 'price':5,19,34,82,199 'prompt':175 'proper':208 'protect':100 'protocol':105 'provid':60 'refer':230 'render':170 'request':14,28,81,97 'request/response':188 'requir':133 'respons':149,200,223 'return':31,206 'schema':224 'sent':136 'servic':69 'settl':84 'share':75 'sign':116 'sinc':127 'span':61 'spars':161 'spec':185 'specif':92 'suit':50 'technic':179 'type':151 'uniform':77 'unit':125 'usdc':86,117,128,145 'usdc-micropayment' 'use':129,143 'util':68 'valid':109 'version':106 'via':7,21 'wallet':174 'x':111 'x-payment':110 'x402':8,22,53,103 'x402-gated':52 'x402-payment'","prices":[{"id":"38861979-633e-4712-871b-58f46584da34","listingId":"34cb7cc5-e519-4c9e-b982-4de164b424eb","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/29/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":"2026-04-19T00:29:49.678Z"}],"sources":[{"listingId":"34cb7cc5-e519-4c9e-b982-4de164b424eb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/29/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T00:29:49.678Z","lastSeenAt":"2026-04-22T02:31:45.769Z"}],"details":{"listingId":"34cb7cc5-e519-4c9e-b982-4de164b424eb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/29/floor \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\" \\\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 a 402 challenge with x402Version 1, requiring USDC payment of up to 20,000 base units ($0.02) on Base network","source_url":"https://lowpaymentfee.com/api/v1/collections/29/floor"},{"claim":"USDC contract address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/29/floor"},{"claim":"Platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) show only 'Connect wallet' with no technical content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Fetching real-time floor prices for a specific NFT collection","Integrating NFT market data into trading bots or dashboards","Programmatic monitoring of NFT collection valuations","Agent-driven NFT price comparison across collections"],"bestFor":["Developers needing on-demand NFT floor-price lookups without API keys","AI agents that can settle x402 micropayments on Base","Low-volume or pay-as-you-go NFT data consumers"],"notFor":["Bulk historical NFT data retrieval (no batch or historical endpoints documented)","Users without a Base-compatible USDC wallet","Anyone needing detailed collection metadata beyond floor price"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.97Z"},"updatedAt":"2026-04-22T02:31:45.769Z"}}