{"id":"3e2c8b8d-2af2-466d-9631-304eab4cea66","shortId":"nRvxC6","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/192` 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, no rate limits, and no minimum 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 (0.02 USD, since USDC uses 6 decimals) to wallet address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3. The payment scheme is \"exact\" on the Base network with a 300-second timeout. The response MIME type is application/json.\n\nHowever, the specific functionality of the `/api/v1/accounts/192` endpoint is unclear. The platform's landing page lists various API categories (analytics, AI, finance, utilities) but does not mention an \"accounts\" endpoint. There is no OpenAPI schema, no detailed documentation (docs, pricing, and README pages all just show a \"Connect wallet\" prompt), and no example request/response payloads available. The actual data returned by this endpoint after payment is unknown.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","json-response","no-api-key","post-method"],"categories":["api-marketplace","crypto"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid endpoint"],"warnings":["The specific functionality of /api/v1/accounts/192 is not documented anywhere on the site","All documentation pages (docs, pricing, README, api) return only a 'Connect wallet' prompt with no actual content","No OpenAPI or schema definition is available","The 'accounts' path does not appear in the platform's listed API categories"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/192","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/192","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation beyond a landing page, no example requests or responses, and the specific purpose of /api/v1/accounts/192 is undocumented. This is effectively a stub 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'/request':13,28 '0.02':12,27,75,120 '000':115 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':130 '20':114 '300':142 '6':125 'Base network API' 'USDC micropayment API' 'accept':105 'access':7,22,38 'account':179 'actual':208 'address':129 'ai':61,171 'analyt':60,170 'api':6,21,37,87,168 'application/json':150 'avail':206 'base':9,24,83,116,138 'call':4,19 'categori':69,169 'challeng':99 'commit':95 'confirm':100 'connect':198 'crypto-paid endpoint' 'data':59,209 'decim':126 'detail':187 'doc':189 'document':188 'endpoint':32,52,71,102,158,180,213 'exact':135 'exampl':203 'financ':64,172 'function':154 'howev':151 'infrastructur':67 'json-response' 'key':88 'land':164 'learn':63 'limit':91 'list':166 'live':104 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':62 'mani':51 'mention':177 'mime':147 'minimum':94 'network':84,139 'no-api-key' 'offer':53 'one':49 'openapi':184 'page':165,193 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payload':205 'payment':42,110,132,215 'per':3,18,76 'platform':56,162 'post':106 'post-method' 'premium':5,20,36 'premium API access' 'price':73,190 'prompt':200 'protocol':43 'provid':35 'rate':90 'readm':192 'request':77,107 'request/response':204 'requir':96,109 'resourc':46 'respons':146 'return':210 'schema':185 'scheme':133 'second':143 'settl':78 'show':196 'sinc':122 'span':58 'specif':45,153 'timeout':144 'type':148 'unclear':160 'unit':117 'unknown':217 'usd':121 'usdc':15,30,80,119,123 'usdc-base-network' 'use':124 'util':68,173 'various':167 'via':10,25,39 'wallet':128,199 'web3':65 'x402':11,26,41,98 'x402 API' 'x402-payment'","prices":[{"id":"635e3f7e-6d47-40f1-a372-c8caba6fc0d5","listingId":"3e2c8b8d-2af2-466d-9631-304eab4cea66","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/192","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:40.381Z"}],"sources":[{"listingId":"3e2c8b8d-2af2-466d-9631-304eab4cea66","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/192","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:40.381Z","lastSeenAt":"2026-04-23T06:04:01.854Z"}],"details":{"listingId":"3e2c8b8d-2af2-466d-9631-304eab4cea66","quickStartSnippet":"# Send a POST with x402 payment header to access the endpoint\ncurl -X POST https://lowpaymentfee.com/api/v1/accounts/192 \\\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, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units of USDC (0.02 USD) on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/192"},{"claim":"Platform offers APIs across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure 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 pay-as-you-go access to account-related data"],"bestFor":["Developers who want keyless, pay-per-use API access","AI agents with x402-compatible payment capabilities","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed API documentation before integrating","Anyone without a Base-network USDC wallet","High-volume consumers who need bulk pricing or rate guarantees"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:32.494Z"},"updatedAt":"2026-04-23T06:04:01.854Z"}}