{"id":"0962b20a-ec97-4f38-b57c-bb060f99e23c","shortId":"SZpFuk","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/67` 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, and infrastructure utilities. The specific resource at `/nfts/67` is labeled \"Premium API Access\" and returns JSON content. It is gated behind an x402 payment challenge requiring USDC on the Base network.\n\nThe x402 challenge advertises a maximum amount of 20,000 base units of USDC (contract `0x8335…2913`, 6 decimals), which equals $0.02 per request. Payment is made via the `exact` scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout. The endpoint accepts HTTP POST requests and is discoverable.\n\nThe broader platform advertises uniform $0.02/request pricing across all endpoints, with no API keys, no rate limits, and no minimum commitments. However, the specific response schema and data returned by `/api/v1/nfts/67` are not documented — the listing title \"Premium API Access\" and the path segment \"nfts/67\" suggest it may return NFT-related data for a specific resource ID, but this is not confirmed by available documentation.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","nft-data","json-response","no-api-key","http-post"],"categories":["web3","nft","data"],"synonyms":["NFT API","x402 NFT endpoint","pay-per-call NFT data","Base USDC API","lowpaymentfee NFT","crypto-gated API","402 payment API"],"warnings":["No documentation exists for the /api/v1/nfts/67 endpoint — its actual response payload is unknown.","The endpoint name 'Premium API Access' is generic and does not describe what data is returned.","No OpenAPI spec, no example responses, and no detailed docs were found on the site.","The broader platform lists many endpoint categories but none specifically for NFTs, making this endpoint's purpose unclear."],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/67","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/67","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation of request/response formats, and the purpose of '/api/v1/nfts/67' is only vaguely implied by its path. The crawled pages beyond the landing page returned only 'Connect wallet' with no useful 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'/nfts/67':66 '/request':144 '0.02':10,24,111,143 '000':99 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':123 '0x8335':105 '20':98 '2913':106 '300':126 '402 payment API' '6':107 'Base USDC API' 'NFT API' 'accept':131 'access':71,178 'across':146 'address':122 'advertis':93,141 'ai/ml':56 'amount':96 'analyt':55 'api':52,70,151,177 'avail':203 'base':8,22,88,100 'behind':79 'broad':42 'broader':139 'call':51 'catalog':43 'challeng':83,92 'commit':159 'confirm':201 'content':75 'contract':104 'crypto-gated API' 'data':5,19,54,166,191 'decim':108 'discover':137 'document':172,204 'endpoint':6,20,30,130,148 'equal':110 'exact':119 'finance/web3':58 'gate':3,17,78 'howev':160 'http':132 'http-post' 'id':196 'infer':57 'infrastructur':60 'json':74 'json-response' 'key':152 'label':68 'limit':155 'list':174 'lowpaymentfee NFT' 'lowpaymentfee.com':37 'made':116 'maximum':95 'may':186 'minimum':158 'network':89 'nft':4,18,189 'nft-data' 'nft-relat':188 'nfts/67':183 'no-api-key' 'offer':40 'part':34 'path':181 'pay':9,23,49 'pay-per-cal':48 'pay-per-call NFT data' 'pay-per-request' 'payment':82,114 'per':11,25,50,112 'platform':38,140 'post':133 'premium':69,176 'price':145 'protocol':47 'rate':154 'relat':190 'request':12,26,113,134 'requir':84 'resourc':64,195 'respons':163 'return':73,167,187 'schema':164 'scheme':120 'second':127 'segment':182 'span':53 'specif':63,162,194 'suggest':184 'timeout':128 'titl':175 'uniform':142 'unit':101 'usdc':14,28,85,103 'usdc-base' 'util':61 'via':117 'x402':2,16,46,81,91 'x402 NFT endpoint' 'x402-gated':1,15 'x402-payment' 'x402-protocol':45","prices":[{"id":"5e0bfc3e-4894-49ab-a1aa-7adc042ce6d9","listingId":"0962b20a-ec97-4f38-b57c-bb060f99e23c","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/67","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:32.737Z"}],"sources":[{"listingId":"0962b20a-ec97-4f38-b57c-bb060f99e23c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/67","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:32.737Z","lastSeenAt":"2026-04-22T04:02:47.253Z"}],"details":{"listingId":"0962b20a-ec97-4f38-b57c-bb060f99e23c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/67 \\\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 x402 challenge requires 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02 per request.","source_url":"https://lowpaymentfee.com/api/v1/nfts/67"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout using the exact scheme.","source_url":"https://lowpaymentfee.com/api/v1/nfts/67"}],"useCases":["Fetching NFT metadata or details for a specific token/resource via a single paid API call","Integrating pay-per-request NFT data into agent workflows without managing API keys","Programmatic access to NFT information settled in USDC on Base L2"],"bestFor":["Agents or bots that need on-demand NFT data without subscription overhead","Developers testing x402 payment flows with low-cost endpoints","Web3 applications needing USDC-settled API access on Base"],"notFor":["High-volume NFT data ingestion where per-call pricing adds up quickly","Users who need detailed API documentation or guaranteed response schemas","Applications requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:50.512Z"},"updatedAt":"2026-04-22T04:02:47.253Z"}}