{"id":"6c531620-53a8-4713-87ad-9a7d4ef40428","shortId":"nBHNXd","kind":"x402","title":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-enabled API platform that provides a collection of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and general utility services. All endpoints are paid per-request using USDC on the Base network via the x402 protocol — no API keys, no rate limits, and no upfront commitments.\n\nThe specific endpoint at `/api/resource/34` is listed as \"Premium API Access\" and accepts POST requests. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 \"exact\" scheme, settling on-chain to the provider's wallet.\n\nThe broader platform advertises endpoints across four 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 uniformly priced at $0.02 per request. Documentation pages exist but appear gated behind a wallet connection, so detailed request/response schemas are not publicly available.","tags":[],"capabilities":["x402-payment","per-request-pricing","usdc-base","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","crypto-quotes","geocoding","utility-apis"],"categories":["llm","data","finance","geo"],"synonyms":["pay-per-call API","x402 API","USDC micropayment API","low fee API","Base network API","crypto-paid API","serverless API marketplace"],"warnings":["Documentation pages (/docs, /api, /pricing, /README) all appear gated behind wallet connection — no public docs available","The specific function of /api/resource/34 is unclear; 'Premium API Access' is a generic label","No OpenAPI schema, no request/response examples, and no detailed endpoint documentation were found","The platform lists many endpoints on its homepage but it is unclear which are actually live and functional"],"endpointUrl":"https://lowpaymentfee.com/api/resource/34","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/resource/34","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 confirms pricing and payment details, but documentation pages are gated behind wallet connection, leaving request/response schemas, detailed endpoint behavior, and example payloads completely unknown. The endpoint path '/api/resource/34' is generic and its specific function is unclear beyond the label 'Premium API 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'/request':19,38 '0.02':18,37,125,194 '000':115 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':120 '20':114 '6':130 'Base network API' 'USDC micropayment API' 'accept':103 'access':101 'across':154 'advertis':152 'ai':12,31,164 'ai-inference' 'ai/ml':56 'analysi':168 'analyt':55,158 'api':5,24,45,82,100 'appear':201 'avail':214 'base':8,27,75,116,122 'behind':203 'broader':150 'call':4,23 'categori':156 'chain':143 'challeng':108 'classif':171 'classification' 'collect':50 'commit':90 'connect':206 'convers':187 'cost':112 'crypto-paid API' 'crypto-quotes' 'data':11,30,54,59,157,161 'data-analytics' 'decim':131 'detail':208 'document':197 'embed':172 'embeddings' 'enabl':44 'endpoint':16,35,52,65,93,153 'equal':124 'estim':182 'exact':138 'exchang':177 'exist':199 'export':162 'feed':176 'financ':13,32,173 'finance-data' 'finance/web3':58 'four':155 'gas':181 'gate':202 'general':61 'generat':188 'geocod':185 'geocoding' 'indic':109 'infer':57 'infrastructure/utilities':184 'insight':163 'key':83 'learn':166 'limit':86 'list':97 'low fee API' 'lowpaymentfee.com':39 'machin':165 'made':134 'maximum':111 'metric':159 'network':76 'offer':10,29 'on-chain':141 'page':198 'paid':67 'pay':2,21 'pay-per-cal':1,20 'pay-per-call API' 'payment':132 'per':3,22,69,126,195 'per-request':68 'per-request-pricing' 'platform':6,25,46,151 'post':104 'premium':99 'price':175,192 'protocol':80 'provid':48,146 'public':213 'quot':180 'rate':85,178 'report':160 'request':70,105,127,196 'request/response':209 'schema':210 'scheme':139 'sentiment':167 'sentiment-analysis' 'serverless API marketplace' 'servic':63 'settl':140 'span':53 'specif':92 'summar':170 'text':169 'text-summarization' 'token':179 'uniform':191 'unit':117 'upfront':89 'usdc':9,28,72,119,128 'usdc-base' 'use':71,129 'util':15,34,62 'utility-apis' 'valid':186 'via':77,135 'wallet':148,205 'web3':174 'x402':43,79,107,137 'x402 API' 'x402-enabled':42 'x402-payment'","prices":[{"id":"1b70f1a4-6901-41ba-b994-5be65e3daf54","listingId":"6c531620-53a8-4713-87ad-9a7d4ef40428","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/resource/34","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:38:10.384Z"}],"sources":[{"listingId":"6c531620-53a8-4713-87ad-9a7d4ef40428","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/resource/34","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:38:10.384Z","lastSeenAt":"2026-04-23T14:30:37.987Z"}],"details":{"listingId":"6c531620-53a8-4713-87ad-9a7d4ef40428","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/resource/34 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -d '{}'","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"All endpoints are priced at $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 for /api/resource/34 specifies maxAmountRequired of 20000 base units of USDC on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913)","source_url":"https://lowpaymentfee.com/api/resource/34"},{"claim":"Platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Agents needing on-demand AI inference (sentiment, summarization, classification) without API key management","Fetching real-time crypto token quotes and gas estimates via micropayment","Running geocoding or data validation calls with per-request USDC settlement","Exporting analytics data or generating insights on a pay-as-you-go basis","Embedding generation for search or RAG pipelines"],"bestFor":["AI agents that need keyless, pay-per-call access to diverse API endpoints","Developers who want to avoid subscription commitments for low-volume usage","Web3-native applications already operating on Base with USDC"],"notFor":["High-volume production workloads where subscription pricing would be cheaper","Users without a Base-compatible wallet or USDC holdings","Applications requiring detailed SLA guarantees or enterprise support"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:42.765Z"},"updatedAt":"2026-04-23T14:30:37.987Z"}}