{"id":"bb52788c-515c-4097-8a8f-eab787380619","shortId":"Vv4PeN","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 12. It is part of a broader suite of pay-per-call APIs offered by lowpaymentfee.com, all settled via the x402 protocol on the Base network using USDC. The specific endpoint path `/api/v1/collections/12/floor` suggests it serves NFT or digital-asset collection floor-price information, though the provider's landing page categorizes its offerings broadly under Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure.\n\nPayment is handled inline: callers send an `X-PAYMENT` header containing a signed USDC payment on Base. The x402 challenge confirms the maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. There are no API keys, no rate limits, and no subscription commitments — each call is independently paid. The asset address `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` is the canonical USDC contract on Base mainnet.\n\nDocumentation is extremely sparse. The landing page lists many endpoints but provides no request/response schemas, parameter descriptions, or example payloads. The docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further content. Because of this, the exact request body format and response structure for the floor-price endpoint are unknown and must be discovered by the caller.","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-base","pay-per-request","collection-data","micropayment"],"categories":["finance","nft","data"],"synonyms":["NFT floor price API","collection floor price","NFT market data","x402 NFT data","Base USDC API","pay-per-call NFT","digital asset floor"],"warnings":["No request or response schema available — callers must discover the format experimentally.","The specific endpoint path /api/v1/collections/12/floor is not listed on the provider's landing page; it may be an unlisted or demo route.","All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no usable content.","The nature of 'collection 12' is unspecified — it is unclear what NFT collection or dataset this refers to."],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/12/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/12/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 valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no request/response schema, no examples, and the endpoint path (collections/12/floor) is not mentioned anywhere on the provider's landing page. The actual data returned is entirely 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'0.02':12,26,146 '000':137 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':169 '12':42 '20':136 '6':142 'Base USDC API' 'NFT floor price API' 'NFT market data' 'address':168 'ai':102 'amount':133 'analyt':101 'api':55,152,202 'asset':83,167 'base':11,25,67,126,138,176 'bodi':221 'broad':98 'broader':48 'call':54,162 'caller':113,240 'canon':172 'categor':95 'challeng':129 'collect':2,16,40,84 'collection floor price' 'collection-data' 'commit':160 'confirm':130 'connect':208 'contain':120 'content':214 'contract':174 'data':6,20,37,100 'decim':143 'descript':194 'digit':82 'digital asset floor' 'digital-asset':81 'discov':237 'doc':199 'document':178 'endpoint':30,73,187,231 'equal':145 'exact':219 'exampl':196 'extrem':180 'financ':105 'floor':4,18,35,86,229 'floor-pric':3,17,34,85,228 'format':222 'handl':111 'header':119 'id':41 'independ':164 'inform':88 'infrastructur':108 'inlin':112 'key':153 'land':93,183 'learn':104 'limit':156 'list':185 'lowpaymentfee.com':32,58 'machin':103 'mainnet':177 'mani':186 'maximum':132 'micropay':9,23 'micropayment' 'must':235 'network':68 'nft':1,15,39,79 'nft-floor-price' 'offer':56,97 'page':94,184,203 'paid':165 'paramet':193 'part':45 'path':74 'pay':52 'pay-per-cal':51 'pay-per-call NFT' 'pay-per-request' 'payload':197 'payment':109,118,124 'per':13,27,53,147 'price':5,19,36,87,200,230 'prompt':210 'protocol':64 'provid':91,189 'rate':155 'render':205 'request':14,28,148,220 'request/response':191 'requir':134 'respons':224 'return':33 'schema':192 'send':114 'serv':78 'settl':60 'sign':122 'spars':181 'specif':72 'structur':225 'subscript':159 'suggest':76 'suit':49 'though':89 'unit':139 'unknown':233 'usdc':70,123,141,173 'usdc-base' 'use':69 'via':7,21,61 'wallet':209 'web3':106 'x':117 'x-payment':116 'x402':8,22,63,128 'x402 NFT data' 'x402-payment'","prices":[{"id":"506dfa2b-6bf7-427b-ae3e-8248b5105959","listingId":"bb52788c-515c-4097-8a8f-eab787380619","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/12/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":"2026-04-19T00:59:37.059Z"}],"sources":[{"listingId":"bb52788c-515c-4097-8a8f-eab787380619","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/12/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T00:59:37.059Z","lastSeenAt":"2026-04-23T00:32:39.129Z"}],"details":{"listingId":"bb52788c-515c-4097-8a8f-eab787380619","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/12/floor \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge requires a maximum of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02 per request.","source_url":"https://lowpaymentfee.com/api/v1/collections/12/floor"},{"claim":"The provider advertises $0.02 per request with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation, pricing, API, and README pages all show only a 'Connect wallet' prompt.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Querying real-time floor prices for NFT collections programmatically","Building trading bots that need on-demand collection floor data","Integrating NFT market data into dashboards without API key management","Agent-driven NFT portfolio valuation"],"bestFor":["Developers needing quick, keyless access to NFT floor prices","AI agents that can settle x402 micropayments on Base","Applications requiring per-call billing with no subscription overhead"],"notFor":["Users who need detailed collection metadata, historical charts, or trait-level pricing (no evidence this endpoint provides that)","High-volume consumers who would benefit from bulk/subscription pricing","Anyone unable to transact USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.793Z"},"updatedAt":"2026-04-23T00:32:39.129Z"}}