{"id":"e7ec3e36-f413-4982-bfb6-64bdec0f0c87","shortId":"N8MFKp","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/32` 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 endpoint appears to serve NFT-related data (resource ID 32), though the exact response payload is not documented. Payment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) at a cost of $0.02 per request (20,000 base units with 6 decimals). The x402 challenge was successfully captured, confirming the endpoint is live.\n\nThe platform advertises a uniform $0.02/request pricing model across all its endpoints with no API keys, no rate limits, and no minimum commitments. Callers authenticate purely via the x402 payment header. The endpoint accepts HTTP POST requests and returns `application/json`. However, there is no OpenAPI schema, no documented request body format, and no example responses available for this specific NFT endpoint, so the exact input parameters and output structure remain unknown.\n\nThe broader lowpaymentfee.com site hosts roughly 16 listed endpoints across four categories (Data & Analytics, AI & Machine Learning, Finance & Web3, Infrastructure), all following the same x402 payment pattern on Base with USDC settlement.","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":["No OpenAPI or schema documentation available for this endpoint","Request body format and response structure are completely undocumented","The /api, /pricing, and /README pages all returned only a 'Connect wallet' prompt with no useful content","It is unclear what NFT data resource ID 32 refers to or what parameters the POST body accepts"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/32","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/32","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 pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no request/response examples, and no documentation for what this NFT endpoint actually returns. The endpoint path suggests NFT data but specifics are entirely 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'/request':122 '0.02':10,24,95,121 '000':99 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':90 '16':194 '20':98 '32':71 '6':103 'Base USDC API' 'NFT API' 'NFT data endpoint' 'accept':150 'across':125,197 'advertis':118 'ai':202 'ai/ml':53 'analyt':52,201 'api':49,131 'appear':62 'application/json':156 'authent':141 'avail':172 'base':8,22,85,100,216 'base-network' 'bodi':166 'broader':189 'caller':140 'captur':110 'categori':199 'challeng':107 'collect':40 'commit':139 'confirm':111 'contract':89 'cost':93 'crypto-gated API' 'data':5,19,51,68,200 'decim':104 'document':79,164 'endpoint':6,20,30,61,113,128,149,177,196 'exact':74,180 'exampl':170 'financ':205 'finance/web3':55 'follow':209 'format':167 'four':198 'gate':3,17 'header':147 'host':192 'howev':157 'http':151 'id':70 'infer':54 'infrastructur':57,207 'input':181 'json-response' 'key':132 'learn':204 'limit':135 'list':195 'live':115 'lowpaymentfee NFT' 'lowpaymentfee.com':37,190 'machin':203 'minimum':138 'model':124 'network':86 'nft':4,18,66,176 'nft-data' 'nft-relat':65 'no-api-key' 'openapi':161 'output':184 'paramet':182 'part':34 'pattern':214 'pay':9,23,46 'pay-per-call NFT' 'pay-per-request':45 'payload':76 'payment':80,146,213 'per':11,25,47,96 'platform':38,117 'post':152 'price':123 'protocol':44 'pure':142 'rate':134 'relat':67 'remain':186 'request':12,26,48,97,153,165 'resourc':69 'respons':75,171 'return':155 'rough':193 'schema':162 'serv':64 'settl':82 'settlement':219 'site':191 'span':50 'specif':60,175 'structur':185 'success':109 'though':72 'uniform':120 'unit':101 'unknown':187 'usdc':14,28,88,218 'usdc-settlement' 'use':87 'util':58 'via':143 'web3':206 'x402':2,16,43,106,145,212 'x402 NFT' 'x402-gated':1,15 'x402-payment' 'x402-protocol':42","prices":[{"id":"98c79e54-7bc1-4547-9cfc-f64aff0081fb","listingId":"e7ec3e36-f413-4982-bfb6-64bdec0f0c87","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/32","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:27.699Z"}],"sources":[{"listingId":"e7ec3e36-f413-4982-bfb6-64bdec0f0c87","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/32","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:27.699Z","lastSeenAt":"2026-04-22T19:33:08.530Z"}],"details":{"listingId":"e7ec3e36-f413-4982-bfb6-64bdec0f0c87","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/32 \\\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 x402 challenge with maxAmountRequired of 20000 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/nfts/32"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/nfts/32"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The site lists approximately 16 endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching NFT metadata or details for a specific token/collection","Integrating NFT data into agent workflows without managing API keys","Programmatic access to NFT information with micropayment settlement"],"bestFor":["Agents or bots that need on-demand NFT data without subscription overhead","Developers experimenting with x402 payment protocol integrations","Low-volume consumers who prefer pay-per-request over monthly plans"],"notFor":["High-volume NFT data consumers who need bulk/batch endpoints","Users who need detailed API documentation or guaranteed SLAs before integrating","Anyone requiring non-USDC or non-Base-network payment settlement"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:58.999Z"},"updatedAt":"2026-04-22T19:33:08.530Z"}}