{"id":"e2280b4c-99d7-453d-bc9c-18a4806fdd58","shortId":"nV3M4L","kind":"x402","title":"Pay-per-call NFT data endpoint on Base, settled in USDC via x402 at $0.02/request.","tagline":"Pay-per-call NFT data endpoint on Base, settled in USDC via x402 at $0.02/request.","description":"This x402-enabled endpoint at `/api/v1/nfts/64` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints share a uniform $0.02-per-call pricing model with no API keys, no rate limits, and no commitments — payment is handled inline via the x402 protocol on the Base network using USDC.\n\nThe specific endpoint `/api/v1/nfts/64` is labeled \"Premium API Access\" in the x402 challenge. Based on the URL pattern it appears to serve NFT-related data (likely for token ID 64), though the provider does not publish detailed documentation for this particular route. The x402 challenge confirms the endpoint is live, accepts POST requests, charges a maximum of 20,000 base units of USDC (i.e., $0.02 given 6 decimals), and pays out to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base.\n\nNo OpenAPI schema, request/response examples, or detailed documentation were found for this endpoint. The provider's landing page lists many other endpoints but does not specifically list `/api/v1/nfts/64`, so its exact response format and accepted parameters remain unknown. The platform's broader value proposition is frictionless, wallet-based micropayments for API access without traditional authentication.","tags":[],"capabilities":["x402-payment","usdc-settlement","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 API","Base network API","pay-per-call NFT","lowpaymentfee"],"warnings":["No documentation or OpenAPI schema available for /api/v1/nfts/64","Endpoint not listed on the provider's own landing page — may be unlisted or experimental","No request parameters or response format documented; integration requires trial and error","The /pricing, /api, and /README pages returned only a 'Connect wallet' prompt with no useful content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/64","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/64","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge with clear pricing, but there is no documentation, no OpenAPI schema, no request/response examples, and the endpoint is not even listed on the provider's own landing page. Effectively a stub with verified 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'/request':17,34 '0.02':16,33,73,168 '000':162 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':177 '20':161 '6':170 '64':133 'Base network API' 'NFT API' 'NFT data endpoint' 'USDC API' 'accept':154,214 'access':111,232 'address':176 'ai/ml':62 'analyt':61 'api':58,81,110,231 'appear':122 'authent':235 'base':9,26,99,116,163,179,228 'base-network' 'broad':51 'broader':221 'call':4,21,76 'catalog':52 'challeng':115,148 'charg':157 'commit':88 'confirm':149 'data':6,23,60,128 'decim':171 'detail':140,186 'document':141,187 'enabl':38 'endpoint':7,24,39,69,105,151,192,201 'exact':210 'exampl':184 'finance/web3':64 'format':212 'found':189 'frictionless':225 'given':169 'handl':91 'i.e':167 'id':132 'infer':63 'infrastructur':66 'inlin':92 'key':82 'label':108 'land':196 'like':129 'limit':85 'list':198,206 'live':153 'lowpaymentfee' 'lowpaymentfee.com':46 'mani':199 'maximum':159 'micropay':229 'micropayment API' 'model':78 'network':100 'nft':5,22,126 'nft-data' 'nft-relat':125 'no-api-key' 'offer':49 'openapi':181 'page':197 'paramet':215 'part':43 'particular':144 'pattern':120 'pay':2,19,55,173 'pay-per-cal':1,18 'pay-per-call NFT' 'pay-per-request':54 'payment':89 'per':3,20,56,75 'per-cal':74 'platform':47,219 'post':155 'post-method' 'premium':109 'price':77 'proposit':223 'protocol':96 'provid':136,194 'publish':139 'rate':84 'relat':127 'remain':216 'request':57,156 'request/response':183 'respons':211 'rout':145 'schema':182 'serv':124 'settl':10,27 'share':70 'span':59 'specif':104,205 'though':134 'token':131 'tradit':234 'uniform':72 'unit':164 'unknown':217 'url':119 'usdc':12,29,102,166 'usdc-settlement' 'use':101 'util':67 'valu':222 'via':13,30,93 'wallet':227 'wallet-bas':226 'without':233 'x402':14,31,37,95,114,147 'x402 NFT' 'x402-enabled':36 'x402-payment'","prices":[{"id":"f0e4ba25-4eca-4987-8979-2802c41b5fd9","listingId":"e2280b4c-99d7-453d-bc9c-18a4806fdd58","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/64","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:28.313Z"}],"sources":[{"listingId":"e2280b4c-99d7-453d-bc9c-18a4806fdd58","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/64","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:28.313Z","lastSeenAt":"2026-04-22T02:32:09.621Z"}],"details":{"listingId":"e2280b4c-99d7-453d-bc9c-18a4806fdd58","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/64 \\\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 requesting USDC payment on Base network with maxAmountRequired of 20000 base units ($0.02)","source_url":"https://lowpaymentfee.com/api/v1/nfts/64"},{"claim":"The 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":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/nfts/64"}],"useCases":["Fetching NFT metadata or details for a specific token via a single paid request","Integrating low-cost NFT data lookups into agent workflows without managing API keys","Demonstrating x402 micropayment flows for Web3-native API consumption"],"bestFor":["Agents or bots that need on-demand NFT data without subscription overhead","Developers experimenting with x402 payment-gated APIs on Base","Low-volume or sporadic NFT data queries where $0.02/call is cost-effective"],"notFor":["High-volume NFT indexing where bulk pricing or free tiers are needed","Users who need detailed documentation or guaranteed SLAs before integrating","Non-crypto users who cannot settle payments in USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:57.949Z"},"updatedAt":"2026-04-22T02:32:09.621Z"}}