{"id":"9e9f8338-15d6-4848-872d-d4b941408327","shortId":"evctMW","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific resource `/api/v1/accounts/189` sits within a broader platform that offers multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform 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 x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract `0x8335...2913` on Base). The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per call. The payment scheme is \"exact,\" meaning each request requires a one-time micropayment. The response MIME type is `application/json`.\n\nThe specific functionality of the `/api/v1/accounts/189` endpoint is not documented beyond the label \"Premium API Access.\" The platform's documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all returned only a \"Connect wallet\" prompt with no substantive content. Without further documentation or example responses, the exact data returned by this particular account endpoint remains unclear. The broader platform advertises endpoints for metrics, reports, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, and more — all at the same $0.02 price point.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","pay-per-request","json-response","no-api-key","post-method"],"categories":["api-gateway","infrastructure"],"synonyms":["premium API","x402 API","micropayment API","pay-per-call","USDC API","Base network API","lowpaymentfee"],"warnings":["The exact data returned by /api/v1/accounts/189 is not documented anywhere in the crawled material.","All documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no substantive content.","No OpenAPI spec or request/response schema is available.","The broader platform lists many endpoints but none match this specific /accounts/189 path, making its purpose unclear."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/189","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/189","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but the specific functionality of /api/v1/accounts/189 is undocumented. No OpenAPI schema, no example requests/responses, and all doc pages return only 'Connect wallet' with no content. The endpoint's purpose beyond 'Premium API Access' is 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'/api/v1/accounts/189':47,162 '/docs':178 '/pricing':179 '/readme':181 '/request':13,28 '0.02':12,27,77,134,235 '000':125 '0x8335':115 '20':124 '2913':116 '6':130 'Base network API' 'USDC API' 'accept':106 'access':7,22,38,172 'account':206 'advertis':213 'ai':61 'amount':121 'analysi':219 'analyt':60 'api':6,21,37,56,89,171 'application/json':156 'base':9,24,85,118,126 'base-network' 'beyond':167 'broader':51,211 'call':4,19,136 'categori':57 'challeng':100 'classif':222 'commit':96 'confirm':101 'connect':186 'content':192 'contract':114 'data':59,201 'decim':131 'document':166,176,195 'embed':223 'endpoint':32,70,103,163,207,214 'equal':133 'exact':141,200 'exampl':197 'exchang':226 'feed':225 'financ':64 'function':159 'geocod':228 'includ':58 'infrastructur':67 'json-response' 'key':90 'label':169 'learn':63 'limit':93 'live':105 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':62 'maximum':120 'mean':142 'metric':216 'micropay':150 'micropayment API' 'mime':153 'multipl':55 'network':86 'no-api-key' 'offer':54 'one':148 'one-tim':147 'page':177 'paid':80 'particular':205 'pay':2,17 'pay-per-cal':1,16 'pay-per-call' 'pay-per-request' 'payment':42,111,138 'per':3,18,78,135 'platform':52,73,174,212 'point':237 'post':107 'post-method' 'premium':5,20,36,170 'premium API' 'price':75,224,236 'prompt':188 'protocol':43 'provid':35 'rate':92,227 'remain':208 'report':217 'request':79,108,144 'requir':97,122,145 'resourc':46 'respons':152,198 'return':183,202 'scheme':139 'sentiment':218 'settl':110 'sit':48 'specif':45,158 'substant':191 'summar':221 'text':220 'time':149 'type':154 'unclear':209 'unit':127 'usdc':15,30,82,113,129 'usdc-micropayment' 'util':68 'via':10,25,39 'wallet':187 'web3':65 'within':49 'without':193 'x402':11,26,41,99 'x402 API' 'x402-payment'","prices":[{"id":"f91942c1-9fb5-4c2e-b2e8-fbf2ec6f979c","listingId":"9e9f8338-15d6-4848-872d-d4b941408327","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/189","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:36.758Z"}],"sources":[{"listingId":"9e9f8338-15d6-4848-872d-d4b941408327","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/189","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:36.758Z","lastSeenAt":"2026-04-24T07:31:49.804Z"}],"details":{"listingId":"9e9f8338-15d6-4848-872d-d4b941408327","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/189 \\\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, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin) on Base network, equaling $0.02.","source_url":"https://lowpaymentfee.com/api/v1/accounts/189"},{"claim":"Platform offers Data & Analytics, AI & ML, Finance & Web3, and Infrastructure API categories.","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium data or services with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Programmatic access to account-level data behind a paywall"],"bestFor":["Developers wanting zero-commitment pay-per-use API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or schemas before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:32.626Z"},"updatedAt":"2026-04-24T07:31:49.804Z"}}