{"id":"55d160a0-d1dd-45d1-aee2-d22147fd7fcc","shortId":"sMULvp","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/56` 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). The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per call. Payment is made via the `exact` scheme with a 300-second timeout window. The response MIME type is `application/json`.\n\nThe specific functionality of `/api/v1/accounts/56` is not documented beyond the label \"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. However, the accounts endpoint does not appear in the public listing, so its exact purpose is unclear. Documentation pages (`/docs`, `/pricing`, `/README`) returned only a wallet-connect prompt with no substantive content.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key"],"categories":["api-gateway","infrastructure"],"synonyms":["premium API","pay-per-call API","x402 endpoint","USDC API","Base network API","micropayment API","lowpaymentfee"],"warnings":["The specific functionality of /api/v1/accounts/56 is not documented anywhere on the site.","All documentation pages (/docs, /pricing, /README) returned only a wallet-connect prompt with no content.","No OpenAPI spec, request schema, or response schema is available.","This endpoint does not appear in the platform's public API listing, making its purpose unclear."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/56","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/56","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 ($0.02 USDC on Base). However, the specific functionality of /api/v1/accounts/56 is undocumented, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty beyond a wallet-connect prompt. The purpose of this particular endpoint is essentially 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'/docs':222 '/pricing':223 '/readme':224 '/request':13,28 '0.02':12,27,75,130,200 '000':121 '0x8335':111 '20':120 '2913':112 '300':142 '6':126 'Base network API' 'USDC API' 'accept':102 'access':7,22,38,165 'account':205 'advertis':169 'ai':61 'amount':117 'analysi':178 'analyt':60 'api':6,21,37,87,164 'appear':209 'application/json':151 'base':9,24,83,114,122 'base-network' 'beyond':160 'broader':167 'call':4,19,132 'categori':69 'challeng':96 'classif':181 'commit':92 'confirm':97 'connect':230 'content':235 'contract':110 'convers':193 'data':59,174 'decim':127 'document':159,220 'embed':182 'endpoint':32,52,71,99,170,206 'equal':129 'estim':190 'exact':138,216 'exchang':185 'export':175 'feed':184 'financ':64 'function':154 'gas':189 'generat':195 'geocod':191 'howev':203 'infrastructur':67 'insight':176 'json-response' 'key':88 'label':162 'learn':63 'limit':90 'list':213 'live':101 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':62 'made':135 'mani':51 'maximum':116 'metric':172 'micropayment API' 'mime':148 'network':84 'no-api-key' 'offer':53 'one':49 'page':221 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payabl':78 'payment':42,107,133 'per':3,18,76,131 'platform':56,168 'point':202 'post':103 'premium':5,20,36,163 'premium API' 'price':73,183,201 'prompt':231 'protocol':43 'provid':35 'public':212 'purpos':217 'quot':188 'rate':89,186 'report':173 'request':77,104 'requir':93,118 'resourc':46 'respons':147 'return':225 'scheme':139 'second':143 'sentiment':177 'settl':106 'span':58 'specif':45,153 'substant':234 'summar':180 'text':179 'timeout':144 'token':187 'type':149 'unclear':219 'unit':123 'usdc':15,30,80,109,125 'usdc-settlement' 'util':68 'valid':192 'via':10,25,39,136 'wallet':229 'wallet-connect':228 'web3':65 'window':145 'x402':11,26,41,95 'x402 endpoint' 'x402-payment'","prices":[{"id":"cfa715c4-3094-4d27-966f-f310ce1a43e8","listingId":"55d160a0-d1dd-45d1-aee2-d22147fd7fcc","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/56","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:50.518Z"}],"sources":[{"listingId":"55d160a0-d1dd-45d1-aee2-d22147fd7fcc","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/56","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:50.518Z","lastSeenAt":"2026-04-24T09:03:16.854Z"}],"details":{"listingId":"55d160a0-d1dd-45d1-aee2-d22147fd7fcc","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/56 \\\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, 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"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units USDC on Base network with 300-second timeout","source_url":"https://lowpaymentfee.com/api/v1/accounts/56"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/56"}],"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-signup, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users comfortable paying in USDC on the Base L2 network"],"notFor":["Users who need detailed documentation or OpenAPI specs before integrating","Anyone requiring fiat-only payment methods with no crypto involvement"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:37.819Z"},"updatedAt":"2026-04-24T09:03:16.854Z"}}