{"id":"ea541571-83bd-45cf-b4f7-0ba2157994fc","shortId":"K8zrhS","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/61` 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 an exact payment of 20,000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base, which has 6 decimals — so 20,000 / 10^6 = $0.02). Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a maximum timeout of 300 seconds. The response MIME type is application/json.\n\nHowever, the specific functionality of the `/api/v1/accounts/61` endpoint is unclear. The platform's landing page lists various API categories (metrics, reports, sentiment analysis, summarization, price feeds, geocoding, etc.) but does not describe an \"accounts\" endpoint. No OpenAPI schema, detailed documentation, or example responses were found — the docs, pricing, API, and README pages all rendered only a \"Connect wallet\" prompt with no substantive content. The actual behavior and response schema of this particular endpoint remain unknown.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","no-api-key","no-rate-limit"],"categories":["api","infrastructure"],"synonyms":["premium API","pay-per-call API","x402 endpoint","USDC micropayment API","Base network API","lowpaymentfee"],"warnings":["The specific functionality of /api/v1/accounts/61 is not documented anywhere on the site","No OpenAPI schema, example requests, or example responses are available","All documentation pages (docs, pricing, README, api) render only a 'Connect wallet' prompt with no content","The 'accounts' endpoint category does not appear in the platform's listed API categories"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/61","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/61","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing, but there is no documentation, no OpenAPI schema, no example responses, and the specific purpose of /api/v1/accounts/61 is undocumented. The docs/pricing/README pages are all blank beyond a wallet connect 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'/request':13,28 '0.02':12,27,75,129 '000':112,126 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':135 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':117 '10':127 '20':111,125 '300':141 '6':122,128 'Base network API' 'USDC micropayment API' 'accept':102 'access':7,22,38 'account':182 'actual':213 'address':134 'ai':61 'analysi':171 'analyt':60 'api':6,21,37,87,166,197 'application/json':148 'base':9,24,83,113,119 'behavior':214 'call':4,19 'categori':69,167 'challeng':96 'commit':92 'confirm':97 'connect':205 'content':211 'data':59 'decim':123 'describ':180 'detail':187 'doc':195 'document':188 'endpoint':32,52,71,99,156,183,221 'etc':176 'exact':108 'exampl':190 'feed':174 'financ':64 'found':193 'function':152 'geocod':175 'howev':149 'infrastructur':67 'json-response' 'key':88 'land':162 'learn':63 'limit':90 'list':164 'live':101 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':62 'made':132 'mani':51 'maximum':138 'metric':168 'mime':145 'network':84 'no-api-key' 'no-rate-limit' 'offer':53 'one':49 'openapi':185 'page':163,200 'particular':220 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,109,130 'per':3,18,76 'platform':56,160 'post':103 'premium':5,20,36 'premium API' 'price':73,173,196 'prompt':207 'protocol':43 'provid':35 'rate':89 'readm':199 'remain':222 'render':202 'report':169 'request':77,104 'requir':93,106 'resourc':46 'respons':144,191,216 'schema':186,217 'second':142 'sentiment':170 'settl':78 'span':58 'specif':45,151 'substant':210 'summar':172 'timeout':139 'type':146 'unclear':158 'unit':114 'unknown':223 'usdc':15,30,80,116 'usdc-base' 'util':68 'various':165 'via':10,25,39 'wallet':206 'web3':65 'x402':11,26,41,95 'x402 endpoint' 'x402-payment'","prices":[{"id":"a29972fa-2e79-4a98-ab9f-d407dc36fe7e","listingId":"ea541571-83bd-45cf-b4f7-0ba2157994fc","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/61","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:54.656Z"}],"sources":[{"listingId":"ea541571-83bd-45cf-b4f7-0ba2157994fc","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/61","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:54.656Z","lastSeenAt":"2026-04-22T18:31:07.236Z"}],"details":{"listingId":"ea541571-83bd-45cf-b4f7-0ba2157994fc","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/61 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","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 20,000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/61"},{"claim":"Platform lists APIs across data & analytics, AI & ML, finance & Web3, and infrastructure at $0.02/request","source_url":"https://lowpaymentfee.com"},{"claim":"No API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/61"}],"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 platform services via x402 payment protocol"],"bestFor":["Developers or agents wanting keyless, pay-as-you-go API access","x402-compatible clients on the Base network","Low-friction micropayment API consumption"],"notFor":["Users needing detailed documentation or guaranteed SLAs before integrating","Use cases requiring known, well-documented response schemas","High-volume consumers who need bulk pricing or subscription plans"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:37.623Z"},"updatedAt":"2026-04-22T18:31:07.236Z"}}