{"id":"64550eb6-a291-4a50-b1d6-4b05d6e7c864","shortId":"FYG3Wp","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/85` is part of the lowpaymentfee.com platform, which offers a broad catalog of x402-protocol pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. The specific resource at `/nfts/85` is labeled \"Premium API Access\" and returns JSON content. Its exact response payload is not documented, but the path suggests it serves NFT-related data for item ID 85.\n\nPayment is handled via the x402 protocol on the Base network. The endpoint accepts USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) with a maximum amount of 20,000 base units, which equals $0.02 USD (USDC uses 6 decimals). There are no API keys, no rate limits, and no subscription commitments — each request is individually settled on-chain. The payment timeout is 300 seconds.\n\nThe platform advertises a uniform $0.02 per request pricing across all its endpoints. No OpenAPI schema, detailed documentation, or example responses were found during the crawl; the `/api`, `/pricing`, and `/README` pages all returned only a \"Connect wallet\" prompt with no additional content. Because of this, the actual data returned by this endpoint remains unclear.","tags":[],"capabilities":["x402-payment","per-request-billing","usdc-base","nft-data","json-response","no-api-key","no-rate-limit"],"categories":["web3","nft","data"],"synonyms":["NFT API","NFT metadata","pay-per-call NFT endpoint","x402 NFT","Base USDC API","lowpaymentfee","crypto API","on-chain payment API"],"warnings":["No API documentation, OpenAPI spec, or example responses available","The exact data returned by /api/v1/nfts/85 is undocumented and unknown","All documentation pages (/api, /pricing, /README) returned only a 'Connect wallet' prompt with no content","The endpoint description 'Premium API Access' is generic and does not describe the actual resource"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/85","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/85","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no documentation, no example request/response, and the actual data returned is unknown. The listing is effectively a stub with only the x402 challenge and a landing page to go 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'/api/v1/nfts/85':32 '/nfts/85':67 '/pricing':186 '/readme':188 '0.02':10,24,126,163 '000':121 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':114 '20':120 '300':156 '6':130 '85':97 'Base USDC API' 'NFT API' 'NFT metadata' 'accept':111 'access':72 'across':167 'actual':205 'addit':199 'advertis':160 'ai/ml':56 'amount':118 'analyt':55 'api':52,71,135 'base':8,22,107,122 'broad':42 'call':51 'catalog':43 'chain':151 'commit':143 'connect':194 'content':76,200 'contract':113 'crawl':183 'crypto API' 'data':5,19,54,59,93,206 'decim':131 'detail':174 'document':83,175 'endpoint':6,20,30,110,170,210 'equal':125 'exact':78 'exampl':177 'finance/web3':58 'found':180 'gate':3,17 'handl':100 'id':96 'individu':147 'infer':57 'infrastructur':61 'item':95 'json':75 'json-response' 'key':136 'label':69 'limit':139 'lowpaymentfee' 'lowpaymentfee.com':37 'maximum':117 'network':108 'nft':4,18,91 'nft-data' 'nft-relat':90 'no-api-key' 'no-rate-limit' 'offer':40 'on-chain':149 'on-chain payment API' 'openapi':172 'page':189 'part':34 'path':86 'pay':9,23,49 'pay-per-cal':48 'pay-per-call NFT endpoint' 'payload':80 'payment':98,153 'per':11,25,50,164 'per-request-billing' 'platform':38,159 'premium':70 'price':166 'prompt':196 'protocol':47,104 'rate':138 'relat':92 'remain':211 'request':12,26,145,165 'resourc':65 'respons':79,178 'return':74,191,207 'schema':173 'second':157 'serv':89 'settl':148 'span':53 'specif':64 'subscript':142 'suggest':87 'timeout':154 'unclear':212 'uniform':162 'unit':123 'usd':127 'usdc':14,28,112,128 'usdc-base' 'use':129 'util':62 'via':101 'wallet':195 'x402':2,16,46,103 'x402 NFT' 'x402-gated':1,15 'x402-payment' 'x402-protocol':45","prices":[{"id":"5b6b300a-e4bc-4f7a-8384-c91b8629d17b","listingId":"64550eb6-a291-4a50-b1d6-4b05d6e7c864","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/85","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:32.575Z"}],"sources":[{"listingId":"64550eb6-a291-4a50-b1d6-4b05d6e7c864","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/85","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:32.575Z","lastSeenAt":"2026-04-22T04:02:47.070Z"}],"details":{"listingId":"64550eb6-a291-4a50-b1d6-4b05d6e7c864","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/85 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/nfts/85"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/nfts/85"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Payment timeout is 300 seconds","source_url":"https://lowpaymentfee.com/api/v1/nfts/85"}],"useCases":["Fetching NFT data or metadata for item 85 without needing an API key","Integrating pay-per-call NFT lookups into an agent workflow","Demonstrating x402 micropayment protocol usage on Base"],"bestFor":["Developers experimenting with x402 pay-per-call protocols","Agents that need keyless, on-demand NFT data access","Low-volume or sporadic API consumers who prefer per-request billing"],"notFor":["High-volume NFT data ingestion where per-request fees add up","Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:50.84Z"},"updatedAt":"2026-04-22T04:02:47.070Z"}}