{"id":"b14a76d2-5308-457f-b0dd-d375545c8086","shortId":"WBCRXa","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 ID 14. It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories, all settled via the x402 protocol on the Base network using USDC.\n\nThe specific endpoint `/api/v1/collections/14/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). This is consistent with the site's advertised flat pricing of $0.02 per request across all endpoints. No API keys are required; payment is handled inline via the x402 payment header.\n\nDocumentation on the site is extremely sparse — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, 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 without documentation it is difficult to know the exact response shape or what collection ID 14 refers to.","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-settlement","base-network","pay-per-request","json-api"],"categories":["finance","nft"],"synonyms":["NFT floor price","collection floor price","NFT market data","x402 NFT API","crypto collectibles price","Base USDC API"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'","No OpenAPI or schema describing request parameters or response format","Unknown what NFT collection ID 14 refers to","No example request or response payloads available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/14/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/14/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, but there is no documentation, no OpenAPI schema, no example requests or responses, and no explanation of what collection 14 is. The docs/pricing/README pages are all blank beyond a wallet-connect prompt. Effectively a stub 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'0.02':109,127 '000':98 '0x8335':103 '14':45,218 '20':97 '2913':104 '402':200 '6':114 'Base USDC API' 'NFT floor price' 'NFT market data' 'accept':83 'across':59,130 'advertis':92,123 'ai/ml':62 'analyt':61 'api':58,134,157 'base':14,30,75,99,106 'base-network' 'broader':51 'call':10,26 'categori':66 'challeng':91,201 'collect':2,18,43,216 'collection floor price' 'connect':165 'consist':118 'contain':192 'content':171 'cost':95 'crypto collectibles price' 'data':60 'decim':115 'descript':183 'difficult':207 'doc':155 'document':147,204 'endpoint':6,22,34,81,132,194 'equal':108 'exact':211 'exampl':178 'extrem':152 'field':186 'finance/web3':63 'flat':124 'floor':4,20,39,189 'floor-pric':3,19,188 'handl':140 'header':146 'id':44,217 'infrastructur':65 'inlin':141 'json':88 'json-api' 'key':135 'know':209 'live':196 'lowpaymentfee.com':36 'maximum':94 'network':76 'nft':1,17,42 'nft-floor-price' 'offer':53 'openapi':175 'page':160 'part':48 'pay':8,24,55 'pay-per-cal':7,23 'pay-per-request':54 'payload':180 'payment':138,145 'per':9,25,56,110,128 'platform':52 'post':84 'price':5,21,40,125,156,190 'prompt':167 'proper':199 'protocol':72 'readm':159 'refer':219 'render':162 'request':57,85,111,129 'request/response':179 'requir':137 'respons':191,212 'return':37,87,197 'schema':176 'settl':68 'shape':213 'site':121,150 'spars':153 'specif':80 'unit':100 'usdc':16,32,78,102,112 'usdc-settlement' 'use':77,113 'via':11,27,69,142 'wallet':166 'without':203 'x402':12,28,71,90,144 'x402 NFT API' 'x402-payment'","prices":[{"id":"857bc938-9d75-4717-be2d-18f89f09fadb","listingId":"b14a76d2-5308-457f-b0dd-d375545c8086","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/14/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":"2026-04-18T22:29:49.502Z"}],"sources":[{"listingId":"b14a76d2-5308-457f-b0dd-d375545c8086","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/14/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T22:29:49.502Z","lastSeenAt":"2026-04-23T00:32:38.744Z"}],"details":{"listingId":"b14a76d2-5308-457f-b0dd-d375545c8086","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/14/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":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/14/floor"},{"claim":"The site advertises $0.02 per request flat pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/14/floor"}],"useCases":["Querying the current floor price of a specific NFT collection programmatically","Building dashboards or bots that track NFT collection valuations","Integrating NFT floor-price data into trading or portfolio tools"],"bestFor":["Agents or apps needing on-demand NFT floor prices without API key management","Developers who want to pay per call with USDC on Base","Low-volume or sporadic NFT data lookups at $0.02 each"],"notFor":["High-volume NFT analytics requiring bulk data or websocket streams","Users who need detailed collection metadata, trait-level pricing, or historical data","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:25.177Z"},"updatedAt":"2026-04-23T00:32:38.744Z"}}