{"id":"7fa58225-84c3-4f06-b009-c4915f3abc19","shortId":"pug3za","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/191` appears to be one of many endpoints offered by the platform, which advertises a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request.\n\nThe endpoint is live and returns a valid x402 challenge on POST. Payment is settled in USDC (contract 0x8335…2913) on the Base network using the \"exact\" scheme. The max amount required is 20,000 base units, which at 6 decimals for USDC equals $0.02. No API keys or rate limits are advertised; access is granted per-call upon payment. The timeout window is 300 seconds.\n\nDocumentation is extremely sparse — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no explanation of what the `/api/v1/accounts/191` endpoint specifically returns. The landing page lists many sibling endpoints but provides no detail on input parameters or response formats for any of them. The exact purpose of the \"accounts/191\" resource is unclear from available material.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response"],"categories":["api","infrastructure"],"synonyms":["premium API","pay-per-call API","x402 API","USDC API access","lowpaymentfee","micropayment API","Base network API"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content","No OpenAPI or schema describing request parameters or response format","The specific purpose of /api/v1/accounts/191 is unclear; the landing page does not list this path among its advertised endpoints","Cannot verify what data or service is actually returned upon successful payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/191","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/191","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, there is no OpenAPI spec, no documentation beyond a landing page listing, no request/response schema, and no explanation of what the /api/v1/accounts/191 endpoint actually returns. The docs pages are empty. The specific purpose of this endpoint is 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'/request':13,28 '0.02':12,27,78,125 '000':115 '0x8335':99 '20':114 '2913':100 '300':146 '6':120 'Base network API' 'USDC API access' 'access':7,22,38,134 'accounts/191':214 'advertis':60,133 'ai':67 'amount':111 'analyt':66 'api':6,21,37,127,155 'appear':48 'avail':219 'base':9,24,103,116 'base-network' 'broad':62 'call':4,19,139 'catalog':63 'challeng':90 'connect':163 'content':169 'contract':98 'data':65 'decim':121 'detail':198 'doc':153 'document':148 'endpoint':32,54,82,185,194 'equal':124 'exact':107,210 'explan':180 'extrem':150 'financ':70 'format':204 'grant':136 'infrastructur':73 'input':200 'json-response' 'key':128 'land':189 'learn':69 'limit':131 'list':191 'live':84 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':68 'mani':53,192 'materi':220 'max':110 'micropayment API' 'network':104 'no-api-key' 'offer':55 'one':51 'openapi':173 'page':158,190 'paramet':201 'path':46 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,93,141 'per':3,18,79,138 'per-cal':137 'platform':58 'post':92 'premium':5,20,36 'premium API' 'price':76,154 'prompt':165 'protocol':43 'provid':35,196 'purpos':211 'rate':130 'readm':157 'render':160 'request':80 'request/response':176 'requir':112 'resourc':215 'respons':203 'return':86,187 'schema':177 'scheme':108 'second':147 'settl':95 'sibl':193 'span':64 'spars':151 'spec':174 'specif':45,186 'timeout':143 'unclear':217 'unit':117 'upon':140 'usdc':15,30,97,123 'usdc-settlement' 'use':105 'util':74 'valid':88 'via':10,25,39 'wallet':164 'web3':71 'window':144 'x402':11,26,41,89 'x402 API' 'x402-payment'","prices":[{"id":"fb61841b-2713-47d0-bd64-5c6d7eaa6950","listingId":"7fa58225-84c3-4f06-b009-c4915f3abc19","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/191","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:41.601Z"}],"sources":[{"listingId":"7fa58225-84c3-4f06-b009-c4915f3abc19","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/191","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:41.601Z","lastSeenAt":"2026-04-22T15:01:02.342Z"}],"details":{"listingId":"7fa58225-84c3-4f06-b009-c4915f3abc19","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/191 \\\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":"The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/191"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/191"},{"claim":"The platform lists endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing a pay-per-call API endpoint without needing API keys or subscriptions","Programmatic account data retrieval settled in USDC on Base","Agent-driven API consumption with per-request crypto micropayments"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto-native micropayments over subscription billing"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone unable to pay in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:32.398Z"},"updatedAt":"2026-04-22T15:01:02.342Z"}}