{"id":"111f0844-9caa-43f9-8547-49cc8c307784","shortId":"fWN25g","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/80` 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 path `/nfts/80`), though the exact response payload is not documented beyond the generic \"Premium API Access\" label. Payment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) at a maximum cost of $0.02 per request (20,000 base units ÷ 10^6 decimals = $0.02).\n\nThe endpoint is live and returns a valid x402 version-1 challenge when called without payment. It accepts HTTP POST requests and returns `application/json`. No API keys or rate limits are advertised — access is gated purely by the x402 micropayment protocol. The platform advertises a uniform $0.02/request pricing across all its endpoints.\n\nDocumentation is minimal: there is no OpenAPI spec, no request/response schema beyond the x402 challenge's `outputSchema` stub, and the crawled docs pages (`/api`, `/pricing`, `/README`) all resolve to a wallet-connect prompt with no additional content. The NFT-specific functionality of this endpoint (e.g., what data it returns for ID 80, whether the ID is a parameter) must be inferred from the URL path alone.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","nft-data","pay-per-request","no-api-key","json-response"],"categories":["web3","nft"],"synonyms":["NFT API","NFT data endpoint","x402 NFT","micropayment API","Base USDC API","pay-per-call NFT","lowpaymentfee"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The exact data returned by /api/v1/nfts/80 is unknown — 'Premium API Access' is a generic label used across all endpoints on this platform","Docs pages (/api, /pricing, /README) all resolve to a wallet-connect prompt with no content","It is unclear whether '80' is a fixed resource or a parameterizable NFT ID"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/80","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/80","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, but there is no OpenAPI spec, no request/response schema, no documentation beyond a generic label, and the NFT-specific functionality is entirely undocumented. The crawled pages provide no additional detail. This is effectively a stub 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'/api':190 '/api/v1/nfts/80':32 '/nfts/80':71 '/pricing':191 '/readme':192 '/request':161 '0.02':10,24,103,113,160 '000':107 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':97 '10':110 '20':106 '6':111 '80':220 'Base USDC API' 'NFT API' 'NFT data endpoint' 'accept':131 'access':85,146 'across':163 'addit':203 'advertis':145,157 'ai/ml':53 'alon':234 'analyt':52 'api':49,84,139 'appear':62 'application/json':137 'base':8,22,92,108 'base-network' 'beyond':80,178 'call':127 'challeng':125,181 'collect':40 'connect':199 'content':204 'contract':96 'cost':101 'crawl':187 'data':5,19,51,68,215 'decim':112 'doc':188 'document':79,167 'e.g':213 'endpoint':6,20,30,61,115,166,212 'exact':74 'finance/web3':55 'function':209 'gate':3,17,148 'generic':82 'http':132 'id':219,223 'infer':54,229 'infrastructur':57 'json-response' 'key':140 'label':86 'limit':143 'live':117 'lowpaymentfee' 'lowpaymentfee.com':37 'maximum':100 'micropay':153 'micropayment API' 'minim':169 'must':227 'network':93 'nft':4,18,66,207 'nft-data' 'nft-relat':65 'nft-specif':206 'no-api-key' 'openapi':173 'outputschema':183 'page':189 'paramet':226 'part':34 'path':70,233 'pay':9,23,46 'pay-per-call NFT' 'pay-per-request':45 'payload':76 'payment':87,129 'per':11,25,47,104 'platform':38,156 'post':133 'premium':83 'price':162 'prompt':200 'protocol':44,154 'pure':149 'rate':142 'relat':67 'request':12,26,48,105,134 'request/response':176 'resolv':194 'resourc':69 'respons':75 'return':119,136,217 'schema':177 'serv':64 'settl':89 'span':50 'spec':174 'specif':60,208 'stub':184 'though':72 'uniform':159 'unit':109 'url':232 'usdc':14,28,95 'usdc-settlement' 'use':94 'util':58 'valid':121 'version':123 'wallet':198 'wallet-connect':197 'whether':221 'without':128 'x402':2,16,43,122,152,180 'x402 NFT' 'x402-gated':1,15 'x402-payment' 'x402-protocol':42","prices":[{"id":"2e78c41e-261a-465f-8ba4-1c8e1b44151c","listingId":"111f0844-9caa-43f9-8547-49cc8c307784","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/80","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:32.492Z"}],"sources":[{"listingId":"111f0844-9caa-43f9-8547-49cc8c307784","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/80","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:32.492Z","lastSeenAt":"2026-04-22T09:02:26.244Z"}],"details":{"listingId":"111f0844-9caa-43f9-8547-49cc8c307784","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/80 \\\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 valid x402 v1 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/nfts/80"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/nfts/80"},{"claim":"Platform advertises $0.02/request uniform pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"}],"useCases":["Fetching NFT metadata or analytics for a specific NFT (ID 80) via a single paid request","Integrating pay-per-use NFT data into an AI agent workflow without managing API keys","Programmatic access to NFT information settled on-chain via Base USDC"],"bestFor":["Developers wanting key-less, pay-per-request NFT data access","AI agents that can settle x402 micropayments on Base","Prototyping Web3-integrated applications with minimal setup"],"notFor":["Bulk NFT data retrieval at scale (no documented batch endpoints or volume discounts)","Users who need detailed API documentation or guaranteed SLAs","Non-crypto users who cannot settle USDC payments on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:50.955Z"},"updatedAt":"2026-04-22T09:02:26.244Z"}}