{"id":"93492992-6a81-4f45-bc61-8193acc5e898","shortId":"rRNwL5","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/94` is part of the lowpaymentfee.com platform, a collection of x402-protocol pay-per-call 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/94`), though the provider's landing page does not explicitly list this particular endpoint among its advertised routes. The endpoint is live and returns a valid x402 challenge.\n\nPricing is $0.02 per request, paid in USDC on the Base network. The x402 challenge specifies a `maxAmountRequired` of 20,000 base units of USDC (contract `0x8335…2913`, 6 decimals), which equals $0.02. Payment is made via the `exact` scheme with no API keys or rate limits required — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof. The response MIME type is `application/json`.\n\nThe broader lowpaymentfee.com platform advertises endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02/request price point. However, documentation beyond the landing page is extremely thin: the `/api`, `/pricing`, and `/README` routes all return only a \"Connect wallet\" prompt with no further detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-call","nft-data","json-response"],"categories":["web3","data"],"synonyms":["NFT API","NFT metadata","lowpaymentfee","x402 NFT endpoint","Base USDC API","pay-per-request API","crypto-paid API"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The /nfts/94 path is not listed among the provider's advertised endpoints on the landing page","No request body schema or response schema documented anywhere","The /api, /pricing, and /README pages return only a 'Connect wallet' prompt with no useful content","Actual functionality behind this endpoint is unknown — 'Premium API Access' is a generic label"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/94","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/94","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation, no OpenAPI spec, no request/response schema, and no examples. The specific /nfts/94 endpoint is not even listed on the provider's landing page. Effectively a stub 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'/api/v1/nfts/94':32 '/nfts/94':74 '/pricing':220 '/readme':222 '/request':206 '0.02':10,24,104,134,205 '000':122 '0x8335':128 '20':121 '2913':129 '6':130 'Base USDC API' 'NFT API' 'NFT metadata' 'advertis':90,174 'ai/ml':53 'among':88 'analysi':183 'analyt':52 'api':49,144 'appear':62 'application/json':169 'attach':152 'avail':248 'base':8,22,112,123 'beyond':211 'broader':171 'call':48 'caller':150 'challeng':101,116 'classif':186 'collect':40 'connect':228 'contract':127 'convers':198 'crypto-paid API' 'data':5,19,51,68,179 'decim':131 'detail':234 'document':210,243 'embed':187 'endpoint':6,20,30,87,93,175 'equal':133 'estim':195 'exact':140 'exampl':247 'exchang':190 'explicit':83 'export':180 'extrem':216 'feed':189 'finance/web3':55 'gas':194 'gate':3,17 'generat':200 'geocod':196 'header':157 'howev':209 'infer':54,69 'infrastructur':57 'insight':181 'json-response' 'key':145 'land':79,213 'limit':148 'list':84 'live':95 'lowpaymentfee' 'lowpaymentfee.com':37,172 'made':137 'maxamountrequir':119 'metric':177 'mime':166 'network':113 'nft':4,18,66 'nft-data' 'nft-relat':65 'openapi':238 'page':80,214 'paid':107 'part':34 'particular':86 'path':73 'pay':9,23,46 'pay-per-cal':45 'pay-per-call' 'pay-per-request API' 'payment':135,156,162 'per':11,25,47,105 'platform':38,173 'point':208 'price':102,188,207 'prompt':230 'proof':163 'protocol':44 'provid':77 'quot':193 'rate':147,191 'relat':67 'report':178 'request':12,26,106 'request/response':241 'requir':149 'resourc':61 'respons':165 'return':97,225 'rout':91,223 'schema':242 'scheme':141 'sentiment':182 'serv':64 'simpli':151 'span':50 'spec':239 'specif':60 'specifi':117 'summar':185 'text':184 'thin':217 'though':75 'token':192 'type':167 'unit':124 'url':72 'usag':246 'usdc':14,28,109,126 'usdc-base' 'util':58 'valid':99,160,197 'via':138 'wallet':229 'x':155 'x-payment':154 'x402':2,16,43,100,115,161 'x402 NFT endpoint' 'x402-gated':1,15 'x402-payment' 'x402-protocol':42","prices":[{"id":"a56e2ef3-e4f1-4d23-9fd8-aa47abab167e","listingId":"93492992-6a81-4f45-bc61-8193acc5e898","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/94","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:28.796Z"}],"sources":[{"listingId":"93492992-6a81-4f45-bc61-8193acc5e898","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/94","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:28.796Z","lastSeenAt":"2026-04-22T02:32:10.240Z"}],"details":{"listingId":"93492992-6a81-4f45-bc61-8193acc5e898","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/94 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","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/94"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/nfts/94"},{"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 landing page lists endpoints for analytics, AI/ML, finance/Web3, and infrastructure but does not list /api/v1/nfts/94","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching NFT data or metadata for a specific token ID via a micropayment","Integrating pay-per-call NFT lookups into an agent workflow without API keys","Programmatic access to NFT information settled on Base L2 in USDC"],"bestFor":["Developers wanting keyless, pay-per-use NFT data access","AI agents that can settle x402 payments on Base","Projects needing low-friction API access without subscriptions"],"notFor":["Bulk NFT data retrieval at scale (no documented batch endpoints or rate-limit info)","Users who need detailed API documentation or OpenAPI specs before integrating","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:57.161Z"},"updatedAt":"2026-04-22T02:32:10.240Z"}}