{"id":"ecf980c2-16cb-48aa-8eb4-e92cbf521886","shortId":"LHVPEF","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 lowpaymentfee.com provides premium API access to NFT data (specifically resource `/api/v1/nfts/5`) via the x402 payment protocol. It is part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request.\n\nPayment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The x402 challenge confirms the endpoint is live, accepting POST requests with an exact-payment scheme. The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. No API keys or rate limits are advertised; access is granted purely through per-request micropayments.\n\nThe specific `/api/v1/nfts/5` endpoint is not listed on the provider's landing page among the advertised API categories, so its exact response schema and data content are unclear. The landing page showcases analytics, AI, finance, and utility endpoints but does not mention NFT-specific routes. The endpoint does respond with a valid x402 challenge, confirming it is operational, but documentation on what NFT data it returns is absent.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","nft-data","pay-per-request","no-api-key","post-method"],"categories":["web3","nft","data"],"synonyms":["NFT API","NFT data endpoint","x402 NFT","micropayment API","USDC pay-per-call","Base network API","lowpaymentfee"],"warnings":["The /api/v1/nfts/5 endpoint is not listed on the provider's landing page among advertised APIs — its purpose and response format are undocumented.","No OpenAPI spec, response schema, or example responses are available.","The /api, /pricing, and /README pages returned only a 'Connect wallet' prompt with no useful documentation.","Cannot verify what data is actually returned after successful payment."],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/5","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/5","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, but there is no documentation, no OpenAPI schema, no response examples, and the /nfts/5 route is not even listed among the provider's advertised endpoints. The actual data returned after payment is 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'0.02':10,24,77,123 '000':114 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':90 '20':113 '6':119 'Base network API' 'NFT API' 'NFT data endpoint' 'USDC pay-per-call' 'absent':210 'accept':99 'access':36,133 'advertis':132,157 'ai':175 'ai/ml':67 'among':155 'amount':110 'analyt':66,174 'api':35,62,126,158 'base':8,22,85,115 'base-network' 'broader':53 'call':61 'categori':159 'challeng':93,196 'confirm':94,197 'content':167 'contract':89 'data':5,19,39,65,70,166,206 'decim':120 'document':202 'dozen':56 'endpoint':6,20,30,63,96,145,179,189 'equal':122 'exact':105,162 'exact-pay':104 'financ':176 'finance/web3':69 'gate':3,17 'grant':135 'infer':68 'infrastructur':72 'key':127 'land':153,171 'limit':130 'list':148 'live':98 'lowpaymentfee' 'lowpaymentfee.com':32 'max':109 'mention':183 'micropay':141 'micropayment API' 'network':86 'nft':4,18,38,185,205 'nft-data' 'nft-specif':184 'no-api-key' 'offer':55 'oper':200 'page':154,172 'part':50 'pay':9,23,59 'pay-per-cal':58 'pay-per-request' 'payment':46,80,106 'per':11,25,60,78,139 'per-request':138 'platform':54 'post':100 'post-method' 'premium':34 'price':75 'protocol':47 'provid':33,151 'pure':136 'rate':129 'request':12,26,79,101,140 'requir':111 'resourc':41 'respond':191 'respons':163 'return':208 'rout':187 'schema':164 'scheme':107 'settl':82 'showcas':173 'span':64 'specif':40,143,186 'unclear':169 'unit':116 'usd':124 'usdc':14,28,88,118 'usdc-micropayment' 'use':87 'util':73,178 'valid':194 'via':43 'x402':2,16,45,92,195 'x402 NFT' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"46ce74d5-98f0-49a7-b44a-b942495c3bd5","listingId":"ecf980c2-16cb-48aa-8eb4-e92cbf521886","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/5","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:28.052Z"}],"sources":[{"listingId":"ecf980c2-16cb-48aa-8eb4-e92cbf521886","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/5","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:28.052Z","lastSeenAt":"2026-04-22T02:32:09.306Z"}],"details":{"listingId":"ecf980c2-16cb-48aa-8eb4-e92cbf521886","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/5\n# Returns 402 with x402 challenge. Include X-PAYMENT header with USDC payment proof on Base to receive data.","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 of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/nfts/5"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/nfts/5"},{"claim":"All listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The landing page lists analytics, AI/ML, finance/Web3, and infrastructure endpoints but does not list NFT endpoints","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching NFT metadata or details via a single paid API call","Integrating pay-per-request NFT data into agent workflows","Accessing premium data without managing API keys or subscriptions"],"bestFor":["Agents that can settle x402 payments in USDC on Base","Developers wanting zero-commitment, pay-as-you-go NFT data access","Prototyping workflows that need on-demand NFT information"],"notFor":["High-volume bulk NFT data retrieval where per-call costs add up","Users who need detailed API documentation or response schema guarantees before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:58.312Z"},"updatedAt":"2026-04-22T02:32:09.306Z"}}