{"id":"fddcc259-2c02-4364-b089-4790743afb81","shortId":"yqYamm","kind":"x402","title":"Pay-per-call NFT data endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call NFT data endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This x402-enabled endpoint at `/api/v1/nfts/22` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints share a uniform pricing model of $0.02 per request, paid in USDC on the Base network with no API keys, rate limits, or upfront commitments required.\n\nThe specific endpoint `/api/v1/nfts/22` is labeled \"Premium API Access\" and accepts HTTP POST requests. The x402 challenge confirms it is live, requesting a maximum of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a timeout of 300 seconds.\n\nDocumentation is minimal — the provider's landing page lists available endpoints and pricing but does not provide request/response schemas, parameter descriptions, or example payloads for any individual endpoint, including this one. The endpoint path suggests it returns data related to NFT ID 22, but the exact response structure is unknown. The platform appears to be a demonstration or early-stage service showcasing low-fee x402 micropayments rather than a mature, fully documented API suite.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","nft-data","http-post"],"categories":["web3","nft"],"synonyms":["NFT API","x402 NFT endpoint","USDC micropayment API","Base network API","pay-per-call NFT","lowpaymentfee","NFT data endpoint"],"warnings":["No request or response schema documented for this endpoint","Endpoint purpose ('Premium API Access' for /api/v1/nfts/22) is vague — actual returned data is unknown","Provider site shows minimal content beyond a landing page; /api, /pricing, and /README pages are empty (wallet-connect only)","Platform may be a demo or early-stage project rather than a production service"],"endpointUrl":"https://lowpaymentfee.com/api/v1/nfts/22","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/22","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, but there is no documentation on request parameters, response schema, or what data the NFT endpoint actually returns. Effectively a stub listing with confirmed 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'/request':17,34 '0.02':16,33,76,133 '000':122 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':144 '0x8335':127 '20':121 '22':193 '2913':128 '300':149 '6':137 'Base network API' 'NFT API' 'NFT data endpoint' 'USDC micropayment API' 'accept':106 'access':104 'address':143 'ai/ml':62 'analyt':61 'api':58,88,103,225 'appear':203 'avail':160 'base':9,26,84,123,130 'base-network' 'broad':51 'call':4,21 'catalog':52 'challeng':112 'commit':94 'confirm':113 'data':6,23,60,188 'decim':138 'demonstr':207 'descript':171 'document':151,224 'earli':210 'early-stag':209 'enabl':38 'endpoint':7,24,39,69,98,161,178,183 'equal':132 'exact':196 'exampl':173 'fee':216 'finance/web3':64 'fulli':223 'given':134 'http':107 'http-post' 'id':192 'includ':179 'individu':177 'infer':63 'infrastructur':66 'key':89 'label':101 'land':157 'limit':91 'list':159 'live':116 'low':215 'low-fe':214 'lowpaymentfee' 'lowpaymentfee.com':46 'matur':222 'maximum':119 'micropay':218 'minim':153 'model':74 'network':85 'nft':5,22,191 'nft-data' 'offer':49 'one':181 'page':158 'paid':79 'paramet':170 'part':43 'path':184 'pay':2,19,55 'pay-per-cal':1,18 'pay-per-call NFT' 'pay-per-request':54 'payload':174 'payment':139 'per':3,20,56,77 'platform':47,202 'post':108 'premium':102 'price':73,163 'provid':155,167 'rate':90 'rather':219 'relat':189 'request':57,78,109,117 'request/response':168 'requir':95 'respons':197 'return':187 'schema':169 'second':150 'sent':141 'servic':212 'settl':12,29 'share':70 'showcas':213 'span':59 'specif':97 'stage':211 'structur':198 'suggest':185 'suit':226 'timeout':147 'uniform':72 'unit':124 'unknown':200 'upfront':93 'usdc':14,31,81,126,135 'usdc-settlement' 'util':67 'via':10,27 'x402':11,28,37,111,217 'x402 NFT endpoint' 'x402-enabled':36 'x402-payment'","prices":[{"id":"6283540e-2c9b-473a-ad53-0a85a93ad2e7","listingId":"fddcc259-2c02-4364-b089-4790743afb81","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/22","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:27.879Z"}],"sources":[{"listingId":"fddcc259-2c02-4364-b089-4790743afb81","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/nfts/22","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:27.879Z","lastSeenAt":"2026-04-22T18:33:27.350Z"}],"details":{"listingId":"fddcc259-2c02-4364-b089-4790743afb81","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/nfts/22 \\\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 requesting 20,000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/nfts/22"},{"claim":"All endpoints on the platform are priced at $0.02 per request with no API keys or rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/nfts/22"}],"useCases":["Fetching NFT metadata or details for a specific token ID via a single paid request","Demonstrating x402 micropayment flows in agent-to-agent commerce","Integrating low-cost, keyless NFT data lookups into automated workflows"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing keyless, pay-per-call NFT data access","Projects wanting USDC micropayments on Base L2"],"notFor":["Production applications requiring documented, stable NFT data schemas","Bulk NFT data retrieval across large collections","Users who need free or subscription-based NFT APIs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:58.698Z"},"updatedAt":"2026-04-22T18:33:27.350Z"}}