{"id":"dec9ad91-dcc2-4780-a42c-eb48d5d740e4","shortId":"LAN8Gb","kind":"x402","title":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402 protocol API platform that provides a collection of pay-per-request 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 endpoints are priced at $0.02 per request, paid in USDC on the Base network.\n\nThe specific endpoint at `/api/v1/accounts/161` is listed as \"Premium API Access\" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335...2913 on Base), which equals $0.02. Payment is made via the x402 exact scheme with no API keys or rate limits required. The platform advertises instant access with no minimums or commitments.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed documentation for any endpoint. The actual functionality behind the `/api/v1/accounts/161` path is unclear, as the site's landing page does not list it among its advertised endpoints. It may be a generic or account-specific resource.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-base","data-analytics","ai-inference","sentiment-analysis","text-summarization","classification","embeddings","finance-data","geocoding","no-api-key"],"categories":["api-platform","llm","finance","geo"],"synonyms":["low payment fee","x402 api","pay per call api","micropayment api","base usdc api","402 payment api","crypto api gateway"],"warnings":["Documentation pages (/docs, /api, /pricing, /README) are all empty, showing only 'Connect wallet'","No OpenAPI or schema available for any endpoint","The endpoint /api/v1/accounts/161 is not listed among the site's advertised API endpoints — its actual functionality is unknown","No request body schema or response format documented anywhere"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/161","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/accounts/161","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 402 challenge, confirming it works. However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet-connect prompt. The specific endpoint path (/api/v1/accounts/161) is not listed among the site's advertised APIs, making its purpose 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'/request':17,34 '0.02':16,33,93,134 '000':123 '0x8335':128 '20':122 '2913':129 '402':117 '402 payment api' 'access':113,155 'account':228 'account-specif':227 'across':52 'actual':199 'advertis':153,219 'ai':10,27,62 'ai-inference' 'among':217 'analysi':66 'analyt':56 'api':4,21,40,112,145,167 'base':7,24,101,124,131 'base usdc api' 'behind':201 'categori':54 'challeng':118 'classif':69 'classification' 'collect':45 'commit':160 'connect':176 'content':182 'convers':86 'crypto api gateway' 'data':9,26,55,59 'data-analytics' 'detail':193 'doc':166 'document':161,194 'embed':70 'embeddings' 'endpoint':14,31,51,89,105,197,220 'equal':133 'estim':80 'exact':141 'exampl':190 'exchang':75 'export':60 'extrem':163 'feed':74 'financ':11,28,71 'finance-data' 'four':53 'function':200 'gas':79 'gate':3,20 'generat':87 'generic':225 'geocod':84 'geocoding' 'infrastructur':82 'insight':61 'instant':154 'key':146 'land':211 'learn':64 'limit':149 'list':109,215 'low payment fee' 'lowpaymentfee.com':35 'machin':63 'made':137 'may':222 'metric':57 'micropayment api' 'minimum':158 'network':102 'no-api-key' 'offer':8,25 'openapi':186 'page':171,212 'paid':96 'path':204 'pay':48 'pay per call api' 'pay-per-request':47 'payment':135 'per':49,94 'platform':5,22,41,152 'premium':111 'price':73,91,168 'prompt':178 'protocol':39 'provid':43 'quot':78 'rate':76,148 'readm':170 'render':173 'report':58 'request':50,95,119 'request/response':189 'requir':150 'resourc':230 'return':115 'schema':187 'scheme':142 'sentiment':65 'sentiment-analysis' 'site':209 'spars':164 'specif':104,229 'substant':181 'summar':68 'text':67 'text-summarization' 'token':77 'unclear':206 'unit':125 'usdc':98,127 'usdc-base' 'util':13,30,83 'valid':85 'via':138 'wallet':177 'web3':72 'x402':2,19,38,140 'x402 api' 'x402-gated':1,18 'x402-payment'","prices":[{"id":"9829e45b-d50e-4067-89ac-5b116a8518ab","listingId":"dec9ad91-dcc2-4780-a42c-eb48d5d740e4","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/accounts/161","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:22.294Z"}],"sources":[{"listingId":"dec9ad91-dcc2-4780-a42c-eb48d5d740e4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/161","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:22.294Z","lastSeenAt":"2026-04-23T12:30:57.786Z"}],"details":{"listingId":"dec9ad91-dcc2-4780-a42c-eb48d5d740e4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/161 \\\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 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 requests maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/161"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing AI inference endpoints (sentiment, summarization, classification, embeddings) without API key management","Fetching real-time financial data like token quotes, gas estimates, and exchange rates on a per-request basis","Running utility operations such as geocoding, validation, and data conversion with micropayments","Integrating pay-as-you-go data analytics and reporting into agent workflows"],"bestFor":["Developers wanting zero-commitment, pay-per-use API access","AI agents that can settle x402 payments in USDC on Base","Projects needing low-friction access to multiple utility endpoints without subscriptions"],"notFor":["Users who need detailed API documentation or OpenAPI schemas before integrating","High-volume consumers who would benefit from bulk pricing or rate-limited plans","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:33.385Z"},"updatedAt":"2026-04-23T12:30:57.786Z"}}