{"id":"9ebf8e46-be30-4cad-ba61-08b2e3b42081","shortId":"j8aAYE","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 path `/api/v1/accounts/13` 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, payable 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 settling payments in USDC (contract 0x8335…2913 on Base) to address 0x1A2B…85F3. The maxAmountRequired of 20000 base units corresponds to $0.02 (USDC uses 6 decimals). The payment timeout is 300 seconds. The endpoint returns application/json responses.\n\nWhile the specific `/api/v1/accounts/13` path'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, README) 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-settlement","base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-gateway","infrastructure"],"synonyms":["premium API","pay-per-call API","x402 API","USDC API access","Base network API","lowpaymentfee","micropayment API"],"warnings":["The exact functionality of /api/v1/accounts/13 is not documented — 'Premium API Access' is the only description available.","All documentation pages (docs, pricing, README) returned no substantive content, only a 'Connect wallet' prompt.","No OpenAPI spec, request schema, or response schema is available for this endpoint.","The broader platform lists many endpoints (AI, finance, data, utils) but none have documented schemas either."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/13","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/13","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, request schema, and response schema are entirely undocumented. All docs/pricing/README pages returned only 'Connect wallet' with no content. This is effectively a stub 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'/request':13,28 '0.02':12,27,75,127,191 '0x1a2b':117 '0x8335':111 '20000':122 '2913':112 '300':136 '6':130 '85f3':118 'Base network API' 'USDC API access' 'accept':102 'access':7,22,38,156 'actual':211 'address':116 'advertis':160 'ai':61 'analysi':169 'analyt':60 'api':6,21,37,87,155 'application/json':141 'base':9,24,83,114,123 'base-network' 'beyond':153 'broader':158 'call':4,19 'categori':69 'challeng':96 'classif':172 'commit':92 'confirm':97 'connect':202 'content':208 'contract':110 'convers':184 'correspond':125 'data':59,165 'decim':131 'doc':196 'document':152,194 'embed':173 'endpoint':32,52,71,99,139,161,217 'estim':181 'exchang':176 'export':166 'feed':175 'financ':64 'function':149 'gas':180 'generat':186 'geocod':182 'infrastructur':67 'insight':167 'json-response' 'key':88 'learn':63 'limit':90 'live':101 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':62 'mani':51 'maxamountrequir':120 'metric':163 'micropayment API' 'network':84 'no-api-key' 'offer':53 'one':49 'page':195 'path':46,147 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payabl':78 'payment':42,107,133 'per':3,18,76 'platform':56,159 'point':193 'post':103 'post-method' 'premium':5,20,36,154 'premium API' 'price':73,174,192,197 'prompt':204 'protocol':43 'provid':35 'quot':179 'rate':89,177 'readm':198 'remain':218 'report':164 'request':77,104 'request/response':212 'requir':93 'respons':142 'return':140,199 'schema':213 'second':137 'sentiment':168 'settl':106 'span':58 'specif':45,145,216 'substant':207 'summar':171 'text':170 'timeout':134 'token':178 'unit':124 'unknown':219 'usdc':15,30,80,109,128 'usdc-settlement' 'use':129 'util':68 'valid':183 'via':10,25,39 'wallet':203 'web3':65 'x402':11,26,41,95 'x402 API' 'x402-payment'","prices":[{"id":"1c2e8cbe-91fb-4121-a982-88c5930a573b","listingId":"9ebf8e46-be30-4cad-ba61-08b2e3b42081","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/13","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:16.003Z"}],"sources":[{"listingId":"9ebf8e46-be30-4cad-ba61-08b2e3b42081","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/13","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:16.003Z","lastSeenAt":"2026-04-24T09:03:15.298Z"}],"details":{"listingId":"9ebf8e46-be30-4cad-ba61-08b2e3b42081","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/13 \\\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 is live and returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/13"},{"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":"Platform offers endpoints across Data & Analytics, AI & ML, 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 access to account-level data behind a paywall"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go API access","AI agents that can settle x402 payments autonomously on Base","Users who prefer crypto-native micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI schemas before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Developers who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:39.404Z"},"updatedAt":"2026-04-24T09:03:15.298Z"}}