{"id":"0f118b67-b77d-4ea4-865f-4e5026bc2f63","shortId":"pknhLy","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/82` 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 82), 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 endpoint uses the x402 \"exact\" payment scheme and accepts POST requests.\n\nThe broader platform advertises a uniform $0.02/request pricing model across all endpoints with no API keys, no rate limits, and no minimum commitments. Other endpoints on the same platform cover sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, and more. However, there is no OpenAPI schema, no detailed documentation for request/response formats, and no examples available for this specific NFT endpoint. The endpoint is confirmed live via a valid 402 challenge response.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","nft-data","pay-per-request","no-api-key","post-method"],"categories":["web3","nft"],"synonyms":["NFT API","NFT data endpoint","x402 NFT","pay-per-call NFT","Base USDC API","lowpaymentfee","crypto NFT lookup"],"warnings":["No OpenAPI or schema documentation available for this endpoint","No request body or response body examples documented anywhere","Endpoint purpose inferred solely from URL path '/api/v1/nfts/82' — actual functionality is unknown","The provider landing page shows many endpoints but none match this specific NFT path, suggesting it may be unlisted or experimental"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/82","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/82","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 with a valid x402 402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and the description 'Premium API Access' is entirely generic. The NFT-specific functionality is only inferred from the URL path. Effectively a stub 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'/request':124 '0.02':10,24,95,123 '000':99 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':90 '20':98 '402':190 '6':103 '82':71 'Base USDC API' 'NFT API' 'NFT data endpoint' 'accept':114 'across':127 'advertis':120 'ai/ml':53 'analysi':149 'analyt':52 'api':49,132 'appear':62 'avail':176 'base':8,22,85,100 'base-network' 'broader':118 'challeng':191 'classif':152 'collect':40 'commit':140 'confirm':185 'contract':89 'cost':93 'cover':147 'crypto NFT lookup' 'data':5,19,51,68 'decim':104 'detail':168 'document':79,169 'embed':153 'endpoint':6,20,30,61,106,129,142,181,183 'exact':74,110 'exampl':175 'exchang':156 'feed':155 'finance/web3':55 'format':172 'gate':3,17 'geocod':158 'howev':161 'id':70 'infer':54 'infrastructur':57 'key':133 'limit':136 'live':186 'lowpaymentfee' 'lowpaymentfee.com':37 'minimum':139 'model':126 'network':86 'nft':4,18,66,180 'nft-data' 'nft-relat':65 'no-api-key' 'openapi':165 'part':34 'pay':9,23,46 'pay-per-call NFT' 'pay-per-request':45 'payload':76 'payment':80,111 'per':11,25,47,96 'platform':38,119,146 'post':115 'post-method' 'price':125,154 'protocol':44 'rate':135,157 'relat':67 'request':12,26,48,97,116 'request/response':171 'resourc':69 'respons':75,192 'schema':166 'scheme':112 'sentiment':148 'serv':64 'settl':82 'span':50 'specif':60,179 'summar':151 'text':150 'though':72 'uniform':122 'unit':101 'usdc':14,28,88 'usdc-settlement' 'use':87,107 'util':58 'valid':189 'via':187 'x402':2,16,43,109 'x402 NFT' 'x402-gated':1,15 'x402-payment' 'x402-protocol':42","prices":[{"id":"148af675-8ee2-46c0-a412-ad51eefd69f5","listingId":"0f118b67-b77d-4ea4-865f-4e5026bc2f63","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/82","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:28.712Z"}],"sources":[{"listingId":"0f118b67-b77d-4ea4-865f-4e5026bc2f63","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/82","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:28.712Z","lastSeenAt":"2026-04-22T11:33:08.056Z"}],"details":{"listingId":"0f118b67-b77d-4ea4-865f-4e5026bc2f63","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/82 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","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 network","source_url":"https://lowpaymentfee.com/api/v1/nfts/82"},{"claim":"Platform pricing is $0.02 per request 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/82"}],"useCases":["Retrieving NFT metadata or details for a specific token/collection","Integrating NFT data into agent workflows without API key management","On-demand NFT queries with micropayment settlement on Base"],"bestFor":["Agents needing keyless, pay-per-request NFT data access","Developers prototyping Web3 applications that need NFT info","Low-volume or sporadic NFT data lookups where subscriptions are overkill"],"notFor":["High-volume NFT indexing (no documented rate limits but no bulk endpoints either)","Users who need detailed documentation or guaranteed SLAs before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:57.256Z"},"updatedAt":"2026-04-22T11:33:08.056Z"}}