{"id":"6aef41e5-ed83-430f-a94a-39f242f277e7","shortId":"H7mRpu","kind":"x402","title":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","tagline":"Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.","description":"lowpaymentfee.com is an x402-enabled API platform that offers a variety of endpoints across data & analytics, AI & machine learning, finance & Web3, and infrastructure utility categories. All endpoints are priced at $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint at `/api/v1/customers/50` is labeled \"Premium API Access\" and accepts POST requests. The x402 challenge confirms it is live, requesting a maximum of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) per call. Payment is made via the x402 exact scheme to the specified payTo address, with a 300-second timeout.\n\nThe broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation. However, the specific functionality behind `/api/v1/customers/50` is not documented beyond its \"Premium API Access\" label, and the docs, pricing, and API pages all render only a wallet-connect prompt with no additional detail. The lack of documentation about what this particular endpoint returns or expects as input is a significant gap.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","no-api-key","post-endpoint","json-response"],"categories":["api-platform","data"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","premium api access"],"warnings":["The specific functionality of /api/v1/customers/50 ('Premium API Access') is not documented — unclear what data it returns or what input it expects.","No OpenAPI spec, no request/response schema, and no example payloads are available.","All documentation pages (docs, api, pricing, README) render only a wallet-connect prompt with no substantive content.","The endpoint path suggests customer data which could involve PII — exercise caution regarding data privacy regulations."],"endpointUrl":"https://lowpaymentfee.com/api/v1/customers/50","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/customers/50","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 specific purpose of /api/v1/customers/50 is undocumented. The docs, pricing, and API pages are effectively empty (wallet-connect 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'/request':13,28 '0.02':12,27,62,120 '000':109 '0x8335':114 '20':108 '2913':115 '300':138 '6':118 'accept':94 'access':92,179 'across':45 'addit':198 'address':135 'advertis':144 'ai':48 'analysi':148 'analyt':47 'api':5,20,37,74,91,178,186 'base':8,23,70,110,117 'base network api' 'behind':170 'beyond':175 'broader':142 'call':4,19,122 'categori':56 'challeng':99 'classif':151 'commit':81 'confirm':100 'connect':194 'convers':163 'data':46 'decim':119 'detail':199 'doc':183 'document':174,203 'embed':152 'enabl':36 'endpoint':44,58,85,145,208 'estim':160 'exact':129 'exchang':155 'expect':211 'feed':154 'financ':51 'function':169 'gap':217 'gas':159 'generat':165 'geocod':161 'howev':166 'infrastructur':54 'input':213 'json-response' 'key':75 'label':89,180 'lack':201 'learn':50 'limit':78 'live':103 'low payment fee' 'lowpaymentfee.com':31 'machin':49 'made':125 'maximum':106 'micropayment api' 'network':9,24,71 'no-api-key' 'offer':40 'page':187 'paid':65 'particular':207 'pay':2,17 'pay per call api' 'pay-per-cal':1,16 'pay-per-request' 'payment':123 'payto':134 'per':3,18,63,121 'platform':6,21,38,143 'post':95 'post-endpoint' 'premium':90,177 'premium api access' 'price':60,153,184 'prompt':195 'quot':158 'rate':77,156 'render':189 'request':64,96,104 'requir':82 'return':209 'scheme':130 'second':139 'sentiment':147 'signific':216 'specif':84,168 'specifi':133 'summar':150 'text':149 'timeout':140 'token':157 'unit':111 'usdc':15,30,67,113 'usdc api' 'usdc-base-network' 'util':55 'valid':162 'varieti':42 'via':10,25,126 'wallet':193 'wallet-connect':192 'web3':52 'x402':11,26,35,98,128 'x402 api' 'x402-enabled':34 'x402-payment'","prices":[{"id":"3b4df674-f89d-479e-a994-7f3ea705fc81","listingId":"6aef41e5-ed83-430f-a94a-39f242f277e7","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/customers/50","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:01.609Z"}],"sources":[{"listingId":"6aef41e5-ed83-430f-a94a-39f242f277e7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/customers/50","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:01.609Z","lastSeenAt":"2026-04-25T03:02:22.777Z"}],"details":{"listingId":"6aef41e5-ed83-430f-a94a-39f242f277e7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/customers/50 \\\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":"All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/customers/50"},{"claim":"Platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium data or customer records via a single paid POST request","Agent-driven API consumption without pre-registration or API keys","Programmatic pay-as-you-go access to various data, AI, and utility endpoints"],"bestFor":["Developers wanting zero-signup, pay-per-call API access","AI agents that can settle x402 payments on Base in USDC","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","High-volume consumers who need bulk pricing or rate-limit guarantees","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:49.005Z"},"updatedAt":"2026-04-25T03:02:22.777Z"}}