{"id":"59e6e5b0-a53b-4480-9fe1-5ec02dd1472f","shortId":"x9SqfT","kind":"x402","title":"x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated NFT data endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at `/api/v1/nfts/71` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The specific resource appears to serve NFT-related data (inferred from the URL path `/nfts/71`), though the provider's landing page does not explicitly list this particular endpoint among its advertised APIs. The endpoint is live and returns a valid x402 challenge.\n\nPayment is settled on the Base network using USDC (contract `0x8335…2913`) via the \"exact\" scheme. The `maxAmountRequired` is 20,000 base units, which at 6 decimals equals $0.02 per request. No API keys or rate limits are advertised; access is granted immediately upon valid x402 payment. The response MIME type is `application/json`, and the endpoint accepts HTTP POST requests.\n\nThe broader lowpaymentfee.com platform advertises a uniform $0.02/request pricing model across all its endpoints. However, no OpenAPI schema, detailed documentation, or example responses are available for this specific NFT endpoint, so the exact request body format and response structure remain unknown. The site's documentation and README pages require wallet connection and do not provide additional technical detail.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","nft-data","pay-per-request","no-api-key","json-response"],"categories":["web3","nft"],"synonyms":["NFT API","NFT data endpoint","x402 NFT","pay-per-call NFT","Base USDC API","lowpaymentfee NFT","crypto-gated API"],"warnings":["The /api/v1/nfts/71 endpoint is not listed among the provider's advertised APIs on the landing page — its purpose is inferred solely from the URL path.","No request body schema or response schema is documented anywhere.","Documentation, README, and pricing pages behind the landing page require wallet connection and yield no useful content.","The nature of the NFT data served (metadata, ownership, pricing, etc.) is entirely unknown."],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/71","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/nfts/71","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 OpenAPI schema, no documentation, no example request/response, and the specific /nfts/71 endpoint is not listed on the provider's landing page. The exact data returned is 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'/nfts/71':74 '/request':170 '0.02':10,24,130,169 '000':122 '0x8335':112 '20':121 '2913':113 '6':127 'Base USDC API' 'NFT API' 'NFT data endpoint' 'accept':158 'access':141 'across':173 'addit':218 'advertis':90,140,166 'ai/ml':53 'among':88 'analyt':52 'api':49,91,134 'appear':62 'application/json':154 'avail':187 'base':8,22,107,123 'base-network' 'bodi':197 'broader':163 'challeng':101 'collect':40 'connect':213 'contract':111 'crypto-gated API' 'data':5,19,51,68 'decim':128 'detail':181,220 'document':182,207 'endpoint':6,20,30,87,93,157,176,192 'equal':129 'exact':116,195 'exampl':184 'explicit':83 'finance/web3':55 'format':198 'gate':3,17 'grant':143 'howev':177 'http':159 'immedi':144 'infer':54,69 'infrastructur':57 'json-response' 'key':135 'land':79 'limit':138 'list':84 'live':95 'lowpaymentfee NFT' 'lowpaymentfee.com':37,164 'maxamountrequir':119 'mime':151 'model':172 'network':108 'nft':4,18,66,191 'nft-data' 'nft-relat':65 'no-api-key' 'openapi':179 'page':80,210 'part':34 'particular':86 'path':73 'pay':9,23,46 'pay-per-call NFT' 'pay-per-request':45 'payment':102,148 'per':11,25,47,131 'platform':38,165 'post':160 'price':171 'protocol':44 'provid':77,217 'rate':137 'readm':209 'relat':67 'remain':202 'request':12,26,48,132,161,196 'requir':211 'resourc':61 'respons':150,185,200 'return':97 'schema':180 'scheme':117 'serv':64 'settl':104 'site':205 'span':50 'specif':60,190 'structur':201 'technic':219 'though':75 'type':152 'uniform':168 'unit':124 'unknown':203 'upon':145 'url':72 'usdc':14,28,110 'usdc-settlement' 'use':109 'util':58 'valid':99,146 'via':114 'wallet':212 'x402':2,16,43,100,147 'x402 NFT' 'x402-gated':1,15 'x402-payment' 'x402-protocol':42","prices":[{"id":"316f6743-3452-441f-8306-9ec938a9a1de","listingId":"59e6e5b0-a53b-4480-9fe1-5ec02dd1472f","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/nfts/71","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:32.630Z"}],"sources":[{"listingId":"59e6e5b0-a53b-4480-9fe1-5ec02dd1472f","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/71","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:32.630Z","lastSeenAt":"2026-04-22T07:32:40.864Z"}],"details":{"listingId":"59e6e5b0-a53b-4480-9fe1-5ec02dd1472f","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/71 \\\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 valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/nfts/71"},{"claim":"The platform advertises $0.02/request uniform pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/nfts/71"}],"useCases":["Fetching NFT metadata or details for a specific token (ID 71)","Integrating NFT data into agent workflows without API key management","Programmatic pay-per-request access to NFT information on Base"],"bestFor":["Agents needing on-demand NFT data without subscription commitments","Developers testing x402 payment flows with low-cost endpoints","Lightweight NFT data lookups settled in USDC on Base"],"notFor":["Bulk NFT data retrieval or collection-wide scans (no batch endpoint documented)","Users who need detailed API documentation or guaranteed SLAs","Non-crypto workflows that cannot settle payments on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:50.712Z"},"updatedAt":"2026-04-22T07:32:40.864Z"}}