{"id":"26f91ed1-afff-40b6-9d4f-737aed30f5d2","shortId":"Qh3NCv","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 broad catalog of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. Every endpoint costs $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no upfront commitments. The specific endpoint at `/api/v1/customers/47` is labeled \"Premium API Access\" and returns JSON via POST.\n\nThe platform advertises four endpoint categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All are priced uniformly at $0.02 per call.\n\nThe x402 challenge was successfully captured, confirming the endpoint is live. Payment is settled on Base using USDC (contract 0x8335…2913) with an exact-scheme challenge requiring a maximum of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). Documentation pages beyond the landing page returned only a \"Connect wallet\" prompt, so detailed request/response schemas, parameter descriptions, and example payloads are not available from the crawl.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","data-analytics","ai-sentiment","ai-summarization","ai-classification","ai-embeddings","finance-prices","exchange-rates","crypto-gas","geocoding","validation","conversion"],"categories":["api-platform","ai","finance","data"],"synonyms":["low payment fee","x402 api","pay per call api","usdc api","base network api","micropayment api","lowpaymentfee"],"warnings":["No OpenAPI or detailed API documentation available — all doc pages returned only 'Connect wallet'","The specific endpoint /api/v1/customers/47 is not listed among the advertised catalog endpoints; its exact function is unknown","No request body schema or response schema is documented anywhere in the crawl"],"endpointUrl":"https://lowpaymentfee.com/api/v1/customers/47","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/47","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02/request in USDC on Base). However, documentation pages are empty beyond the landing page, there is no OpenAPI schema, no request/response examples, and the specific purpose of the /api/v1/customers/47 endpoint is unclear beyond its generic 'Premium API Access' 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'label':86 'land':188 'learn':110 'limit':75 'live':152 'low payment fee' 'lowpaymentfee' 'lowpaymentfee.com':31 'machin':109 'maximum':171 'metric':103 'micropayment api' 'network':9,24,68 'offer':40 'page':185,189 'paid':62 'paramet':200 'pay':2,17 'pay per call api' 'pay-per-cal':1,16 'pay-per-request' 'payload':204 'payment':153 'per':3,18,60,140 'platform':6,21,38,96 'post':94 'premium':87 'price':119,136 'prompt':195 'quot':124 'rate':74,122 'report':104 'request':61 'request/response':198 'requir':169 'return':91,190 'schema':199 'scheme':167 'sentiment':111 'servic':55 'settl':155 'span':46 'specif':81 'success':146 'summar':114 'text':113 'token':123 'uniform':137 'unit':176 'upfront':78 'usdc':15,30,64,159,180 'usdc api' 'usdc-base' 'use':158 'util':54,129 'valid':131 'validation' 'via':10,25,93 'wallet':194 'web3':118 'x402':11,26,35,143 'x402 api' 'x402-enabled':34 'x402-payment'","prices":[{"id":"1e4c0103-6dbc-4c73-ae66-a373a1644c82","listingId":"26f91ed1-afff-40b6-9d4f-737aed30f5d2","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/47","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:14.285Z"}],"sources":[{"listingId":"26f91ed1-afff-40b6-9d4f-737aed30f5d2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/customers/47","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:14.285Z","lastSeenAt":"2026-04-22T23:00:57.508Z"}],"details":{"listingId":"26f91ed1-afff-40b6-9d4f-737aed30f5d2","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/customers/47 \\\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 cost $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge returns maxAmountRequired of 20000 base units in USDC (6 decimals = $0.02) on Base","source_url":"https://lowpaymentfee.com/api/v1/customers/47"},{"claim":"Platform offers endpoints in Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/customers/47"}],"useCases":["Querying real-time financial data (prices, exchange rates, gas estimates) without API key management","Running AI inference tasks (sentiment, summarization, classification, embeddings) on a per-call payment basis","Accessing utility services like geocoding or data validation with instant, keyless access","Building agent workflows that pay per request using x402 on Base"],"bestFor":["Developers wanting zero-setup, pay-as-you-go API access","AI agents that can settle x402 micropayments in USDC on Base","Projects needing lightweight, keyless access to diverse API categories"],"notFor":["Users who need detailed API documentation or OpenAPI schemas before integrating","High-volume consumers who would benefit from bulk pricing or subscription plans","Users without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:48.432Z"},"updatedAt":"2026-04-22T23:00:57.508Z"}}