{"id":"f26a191c-14b9-4085-817e-f5699310d7a4","shortId":"5m9ESt","kind":"x402","title":"NFT collection floor-price lookup via x402 micropayment on Base, $0.02 per request.","tagline":"NFT collection floor-price lookup via x402 micropayment on Base, $0.02 per request.","description":"This endpoint at lowpaymentfee.com returns floor-price data for NFT collection ID 20. 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 resource path `/api/v1/collections/20/floor` suggests it retrieves the current floor price for a particular NFT collection, though the provider does not publish detailed documentation for this specific route.\n\nPayment is handled inline: callers send an `X-PAYMENT` header containing a signed x402 payment envelope. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. The payment settles to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base mainnet. No API keys, accounts, or rate limits are advertised — access is purely pay-per-call.\n\nThe provider's landing page lists many other endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categories, all at the same $0.02 price point. However, documentation pages (`/docs`, `/pricing`, `/README`) returned only a \"Connect wallet\" stub with no substantive content, so details about request parameters, response schemas, and error handling are unavailable.","tags":[],"capabilities":["nft-floor-price","x402-payment","usdc-settlement","base-network","pay-per-call","no-api-key"],"categories":["crypto","nft","finance"],"synonyms":["NFT floor price","collection floor","NFT market data","floor price API","NFT collection data","crypto collectibles price"],"warnings":["No documentation available — /docs, /pricing, and /README all return only a 'Connect wallet' stub with no content.","Request body schema and response schema are completely undocumented; callers must experiment to discover the correct payload.","The collection ID '20' is hardcoded in the path; it is unclear which NFT collection this refers to or whether other IDs are valid.","The provider lists many diverse endpoints (AI, finance, utilities) all at $0.02 — the breadth and uniform pricing raise questions about whether all endpoints are fully functional."],"endpointUrl":"https://lowpaymentfee.com/api/v1/collections/20/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/20/floor","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and well-formed, confirming the endpoint exists and accepts payment at $0.02 USDC on Base. However, there is no OpenAPI schema, no documented request/response format, and all documentation pages are empty stubs. The specific purpose (NFT collection floor price) is inferred from the URL path 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'/docs':186 '/pricing':187 '/readme':188 '0.02':12,26,132,180 '000':123 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':140 '20':42,122 '6':128 'NFT collection data' 'NFT floor price' 'NFT market data' 'access':153 'account':147 'across':169 'address':139 'advertis':152 'ai/ml':171 'amount':119 'api':55,145 'base':11,25,67,124,142 'base-network' 'broader':48 'call':54,159 'caller':104 'categori':175 'collect':2,16,40,87 'collection floor' 'connect':192 'contain':111 'content':198 'crypto collectibles price' 'current':80 'data':37 'data/analytics':170 'decim':129 'detail':94,200 'document':95,184 'endpoint':30,168 'envelop':116 'equal':131 'error':207 'finance/web3':172 'floor':4,18,35,81 'floor price API' 'floor-pric':3,17,34 'handl':102,208 'header':110 'howev':183 'id':41 'infrastructur':174 'inlin':103 'key':146 'land':163 'limit':150 'list':165 'lookup':6,20 'lowpaymentfee.com':32,58 'mainnet':143 'mani':166 'maximum':118 'micropay':9,23 'network':68 'nft':1,15,39,86 'nft-floor-price' 'no-api-key' 'offer':56 'page':164,185 'paramet':203 'part':45 'particular':85 'path':74 'pay':52,157 'pay-per-cal':51,156 'pay-per-call' 'payment':100,109,115,136 'per':13,27,53,133,158 'point':182 'price':5,19,36,82,181 'protocol':64 'provid':90,161 'publish':93 'pure':155 'rate':149 'request':14,28,134,202 'requir':120 'resourc':73 'respons':204 'retriev':78 'return':33,189 'rout':99 'schema':205 'send':105 'settl':60,137 'sign':113 'specif':72,98 'stub':194 'substant':197 'suggest':76 'suit':49 'though':88 'unavail':210 'unit':125 'usdc':70,127 'usdc-settlement' 'use':69 'via':7,21,61 'wallet':193 'x':108 'x-payment':107 'x402':8,22,63,114 'x402-payment'","prices":[{"id":"7211620b-ddcd-4871-8f1a-5362521642c8","listingId":"f26a191c-14b9-4085-817e-f5699310d7a4","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/20/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":"2026-04-19T00:59:35.842Z"}],"sources":[{"listingId":"f26a191c-14b9-4085-817e-f5699310d7a4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/collections/20/floor","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-19T00:59:35.842Z","lastSeenAt":"2026-04-22T01:02:00.094Z"}],"details":{"listingId":"f26a191c-14b9-4085-817e-f5699310d7a4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/collections/20/floor \\\n  -H \"X-PAYMENT: <x402-signed-envelope>\" \\\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 x402 version 1 challenge requiring USDC payment on Base","source_url":"https://lowpaymentfee.com/api/v1/collections/20/floor"},{"claim":"Maximum amount required is 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/collections/20/floor"},{"claim":"Provider advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /pricing, /README) contain only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieve the current floor price of a specific NFT collection for trading bots","Monitor NFT collection valuations in a portfolio dashboard","Feed floor-price data into automated bidding or listing strategies"],"bestFor":["Agents needing on-demand NFT floor prices without API key management","Micropayment-native workflows on Base that want USDC settlement","Low-volume or sporadic callers who prefer pay-per-request over subscriptions"],"notFor":["High-frequency trading requiring sub-second latency guarantees (no SLA documented)","Users who need bulk historical floor-price time series (endpoint appears to return current data only)","Callers who cannot produce x402 payment headers (requires USDC on Base)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:24.794Z"},"updatedAt":"2026-04-22T01:02:00.094Z"}}