{"id":"69513b08-ef18-4836-bd60-56ba74e8c2f6","shortId":"ME2dGg","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/33` 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. There are no API keys or rate limits advertised; access is granted per-call upon payment. The timeout window is 300 seconds.\n\nWhile the landing page lists many endpoints across categories (sentiment analysis, text summarization, geocoding, price feeds, etc.), the specific functionality behind `/api/v1/accounts/33` is not documented beyond the generic label \"Premium API Access.\" No OpenAPI schema, request/response examples, or detailed documentation were found — the docs, pricing, and API pages all render only a \"Connect wallet\" prompt. The actual data returned by this endpoint after payment is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response"],"categories":["api","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC API access","Base network API","micropayment API","lowpaymentfee","accounts endpoint"],"warnings":["The specific functionality of /api/v1/accounts/33 is not documented anywhere — 'Premium API Access' is the only description available.","All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no actual content.","No OpenAPI schema or response examples are available; the output of a successful paid request is unknown.","The platform lists many endpoint categories (AI, finance, analytics, etc.) but it is unclear which, if any, are fully functional."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/33","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/33","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, but the actual functionality behind /api/v1/accounts/33 is completely undocumented. No OpenAPI spec, no request/response examples, and no description beyond the generic 'Premium API Access' label. The docs pages are empty (wallet-connect only). Without knowing what data or service this endpoint provides, it is effectively a stub 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'/request':13,28 '0.02':12,27,78,125 '000':115 '0x8335':99 '20':114 '2913':100 '300':147 '6':120 'Base network API' 'USDC API access' 'access':7,22,38,135,180 'accounts endpoint' 'across':156 'actual':205 'advertis':60,134 'ai':67 'amount':111 'analysi':159 'analyt':66 'api':6,21,37,129,179,195 'appear':48 'base':9,24,103,116 'base-network' 'behind':169 'beyond':174 'broad':62 'call':4,19,140 'catalog':63 'categori':157 'challeng':90 'connect':201 'contract':98 'data':65,206 'decim':121 'detail':187 'doc':192 'document':173,188 'endpoint':32,54,82,155,210 'equal':124 'etc':165 'exact':107 'exampl':185 'feed':164 'financ':70 'found':190 'function':168 'generic':176 'geocod':162 'grant':137 'infrastructur':73 'json-response' 'key':130 'label':177 'land':151 'learn':69 'limit':133 'list':153 'live':84 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':68 'mani':53,154 'max':110 'micropayment API' 'network':104 'no-api-key' 'offer':55 'one':51 'openapi':182 'page':152,196 'path':46 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,93,142,212 'per':3,18,79,139 'per-cal':138 'platform':58 'post':92 'premium':5,20,36,178 'price':76,163,193 'prompt':203 'protocol':43 'provid':35 'rate':132 'render':198 'request':80 'request/response':184 'requir':112 'return':86,207 'schema':183 'scheme':108 'second':148 'sentiment':158 'settl':95 'span':64 'specif':45,167 'summar':161 'text':160 'timeout':144 'unit':117 'unknown':214 'upon':141 'usdc':15,30,97,123 'usdc-settlement' 'use':105 'util':74 'valid':88 'via':10,25,39 'wallet':202 'web3':71 'window':145 'x402':11,26,41,89 'x402 API' 'x402-payment'","prices":[{"id":"99a9885f-1856-4c0b-b9a1-017c566f3084","listingId":"69513b08-ef18-4836-bd60-56ba74e8c2f6","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/33","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:32.362Z"}],"sources":[{"listingId":"69513b08-ef18-4836-bd60-56ba74e8c2f6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/33","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:32.362Z","lastSeenAt":"2026-04-22T18:31:05.810Z"}],"details":{"listingId":"69513b08-ef18-4836-bd60-56ba74e8c2f6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/33 \\\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","source_url":"https://lowpaymentfee.com/api/v1/accounts/33"},{"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 on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/33"},{"claim":"The platform lists endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to premium data or services without API key registration","Agent-driven workflows that need on-demand paid API calls settled in USDC on Base","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers or agents wanting zero-signup, pay-per-use API access","x402 protocol experimentation on Base with low per-call cost","Scenarios where avoiding API key management is desirable"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","High-volume use cases where $0.02/request adds up without bulk discounts","Anyone needing to understand the exact response schema before paying"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:38.66Z"},"updatedAt":"2026-04-22T18:31:05.810Z"}}