{"id":"f9aca9e4-65c9-4003-8d79-b1c83f3edd0b","shortId":"99FbfQ","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 18 on the lowpaymentfee.com platform. 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 market data, and utility services. All endpoints on the platform use the x402 protocol for payment, settling in USDC on the Base network.\n\nThe specific endpoint `/api/v1/collections/18/floor` is not explicitly listed on the provider's landing page, but the x402 challenge confirms it is live and accepts POST requests. The payment challenge indicates a max amount of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 given USDC's 6 decimals. This is consistent with the provider's advertised flat rate of $0.02 per request across all endpoints. No API keys or rate limits are required; access is granted immediately upon payment.\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 request/response schema, and no usage examples available. The actual response format for this floor-price endpoint must be inferred. The endpoint is confirmed live (HTTP 402 challenge returned successfully).","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-base","pay-per-request","collection-data"],"categories":["finance","nft","web3"],"synonyms":["NFT floor price","collection floor","NFT market data","floor price API","NFT collection stats","crypto NFT data"],"warnings":["No documentation available — /docs, /pricing, /api, and /README pages all return only a wallet-connect prompt with no technical content.","No OpenAPI or JSON schema for request or response bodies; response format is unknown.","The specific endpoint path (/api/v1/collections/18/floor) is not listed on the provider's landing page; its existence is confirmed only by the x402 challenge.","Collection ID 18 is unidentified — no metadata about which NFT collection this refers to."],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/18/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/18/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 via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation, and no examples. The specific collection (ID 18) is not described anywhere. This is effectively a stub 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'/api/v1/collections/18/floor':95 '/docs':183 '/pricing':185 '/readme':187 '0.02':12,26,137,154 '000':127 '0x8335':132 '18':40 '20':126 '402':233 '6':141 'NFT collection stats' 'NFT floor price' 'NFT market data' 'accept':115 'access':168 'across':157 'actual':215 'addit':198 'advertis':150 'ai/ml':66 'amount':124 'analyt':65 'api':57,161 'avail':213 'base':11,25,90,128,134 'beyond':175 'broader':50 'call':56 'challeng':109,120,234 'collect':2,16,38 'collection floor' 'collection-data' 'confirm':110,230 'connect':193 'consist':145 'crypto NFT data' 'data':6,20,35,64,70 'decim':142 'detail':200 'document':174 'endpoint':30,75,94,159,223,228 'equal':136 'exampl':212 'explicit':98 'extrem':180 'finance/web3':68 'flat':151 'floor':4,18,33,221 'floor price API' 'floor-pric':3,17,32,220 'format':217 'given':138 'grant':170 'http':232 'id':39 'immedi':171 'indic':121 'infer':67,226 'key':162 'land':104,177 'limit':165 'list':99 'live':113,231 'lowpaymentfee.com':43 'market':69 'max':123 'micropay':9,23 'must':224 'network':91 'nft':1,15,37 'nft-floor-price' 'offer':58 'openapi':204 'page':105,178,188 'part':47 'pay':54 'pay-per-cal':53 'pay-per-request' 'payment':84,119,173 'per':13,27,55,155 'platform':44,78 'post':116 'price':5,19,34,222 'prompt':195 'protocol':82 'provid':62,102,148 'rate':152,164 'render':190 'request':14,28,117,156 'request/response':207 'requir':167 'respons':216 'return':31,235 'schema':208 'servic':73 'settl':85 'span':63 'spars':181 'spec':205 'specif':93 'success':236 'suit':51 'technic':199 'unit':129 'upon':172 'usag':211 'usdc':87,131,139 'usdc-base' 'use':79 'util':72 'via':7,21 'wallet':194 'x402':8,22,81,108 'x402-payment'","prices":[{"id":"d28f3d9f-582f-4387-8dc8-b4788f3afd30","listingId":"f9aca9e4-65c9-4003-8d79-b1c83f3edd0b","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/18/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":"f9aca9e4-65c9-4003-8d79-b1c83f3edd0b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/18/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T23:59:54.776Z","lastSeenAt":"2026-04-23T00:32:38.868Z"}],"details":{"listingId":"f9aca9e4-65c9-4003-8d79-b1c83f3edd0b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/18/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":"The endpoint returns HTTP 402 with an x402 challenge advertising USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/collections/18/floor"},{"claim":"maxAmountRequired is 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/collections/18/floor"},{"claim":"The provider advertises $0.02 per request across all endpoints with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching the current floor price of a specific NFT collection for trading bots","Monitoring NFT collection valuations in dashboards or portfolio trackers","Integrating real-time NFT floor data into agent workflows that need on-demand market pricing"],"bestFor":["Agents or bots needing on-demand NFT floor prices without API key management","Low-volume, pay-as-you-go NFT data consumers","x402-compatible clients on the Base network"],"notFor":["High-frequency bulk NFT data ingestion (no documented batch endpoint or rate-limit info)","Users who need detailed NFT metadata, traits, or historical sales beyond floor price"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.133Z"},"updatedAt":"2026-04-23T00:32:38.868Z"}}