{"id":"f5eb1e61-7a58-4a0f-9731-e4592eb67f61","shortId":"tn4C3v","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/72` is one of many endpoints offered by the platform, which spans data & analytics, AI & machine learning, finance & Web3, and infrastructure utility categories. All endpoints are priced at $0.02 per request, settled in USDC on the Base network with no API keys, rate limits, or commitments required.\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests and requiring payment of up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) per call. Payment is made via the `exact` scheme to the specified payTo address, with a 300-second timeout. The response MIME type is `application/json`.\n\nWhile the specific `/api/v1/accounts/72` endpoint's functionality is not documented beyond \"Premium API Access,\" the broader platform advertises endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. Documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all returned only a \"Connect wallet\" prompt with no substantive content, so the actual request/response schemas for this specific endpoint remain unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-api","no-api-key","no-rate-limit"],"categories":["api","infrastructure"],"synonyms":["premium API","pay-per-call API","x402 API","USDC micropayment API","lowpaymentfee","Base network API","accounts endpoint"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all return only a 'Connect wallet' prompt with no content.","The specific functionality of /api/v1/accounts/72 ('Premium API Access') is not described anywhere in the crawled material.","No request or response schema is available; integrators must discover behavior empirically.","The platform lists many endpoints but none have documented input/output contracts."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/72","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/72","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 endpoint's purpose (\"Premium API Access\" on /accounts/72) is undocumented. No OpenAPI spec, no request/response schema, and all doc pages return only a wallet-connect prompt. The listing is effectively a stub with confirmed 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'/api/v1/accounts/72':47,152 '/docs':202 '/pricing':203 '/readme':205 '/request':13,28 '0.02':12,27,75,123,197 '000':112 '0x8335':117 '20':111 '2913':118 '300':140 '6':121 'Base network API' 'USDC micropayment API' 'accept':102 'access':7,22,38,162 'accounts endpoint' 'actual':219 'address':137 'advertis':166 'ai':61 'analysi':175 'analyt':60 'api':6,21,37,87,161 'application/json':148 'base':9,24,83,113,120 'beyond':159 'broader':164 'call':4,19,125 'categori':69 'challeng':96 'classif':178 'commit':92 'confirm':97 'connect':210 'content':216 'convers':190 'data':59,171 'decim':122 'document':158,200 'embed':179 'endpoint':32,52,71,99,153,167,225 'estim':187 'exact':131 'exchang':182 'export':172 'feed':181 'financ':64 'function':155 'gas':186 'generat':192 'geocod':188 'infrastructur':67 'insight':173 'json-api' 'key':88 'learn':63 'limit':90 'live':101 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':62 'made':128 'mani':51 'metric':169 'mime':145 'network':84 'no-api-key' 'no-rate-limit' 'offer':53 'one':49 'page':201 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,107,126 'payto':136 'per':3,18,76,124 'platform':56,165 'point':199 'post':103 'premium':5,20,36,160 'premium API' 'price':73,180,198 'prompt':212 'protocol':43 'provid':35 'quot':185 'rate':89,183 'remain':226 'report':170 'request':77,104 'request/response':220 'requir':93,106 'resourc':46 'respons':144 'return':207 'schema':221 'scheme':132 'second':141 'sentiment':174 'settl':78 'span':58 'specif':45,151,224 'specifi':135 'substant':215 'summar':177 'text':176 'timeout':142 'token':184 'type':146 'unit':114 'unknown':227 'usdc':15,30,80,116 'usdc-base' 'util':68 'valid':189 'via':10,25,39,129 'wallet':211 'web3':65 'x402':11,26,41,95 'x402 API' 'x402-payment'","prices":[{"id":"40071025-c32e-442e-b8e4-dd0547435f6a","listingId":"f5eb1e61-7a58-4a0f-9731-e4592eb67f61","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/72","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:40:02.557Z"}],"sources":[{"listingId":"f5eb1e61-7a58-4a0f-9731-e4592eb67f61","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/72","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:40:02.557Z","lastSeenAt":"2026-04-22T18:31:07.986Z"}],"details":{"listingId":"f5eb1e61-7a58-4a0f-9731-e4592eb67f61","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/72 \\\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":"Endpoint returns 402 with x402 challenge requiring up to 20,000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/72"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/72"},{"claim":"All endpoints priced at $0.02 per request with no API keys, rate limits, or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium account data with per-request USDC micropayments","Agent-driven API consumption without pre-registration or API keys","Programmatic access to platform services settled on Base L2"],"bestFor":["Developers wanting keyless, pay-as-you-go API access","AI agents that can settle x402 payments in USDC on Base","Users who prefer no subscriptions or rate limits"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","Anyone without a Base-compatible USDC wallet","High-volume consumers who want bulk pricing or subscription discounts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:37.207Z"},"updatedAt":"2026-04-22T18:31:07.986Z"}}