{"id":"360c87f8-cc16-4008-a685-11be74b482b5","shortId":"AuK5sV","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific path `/api/v1/accounts/144` 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 x402 challenge confirms the endpoint is live on the Base network, accepting USDC (contract 0x8335…2913) with a max amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). Payment is made per-call via the x402 exact scheme with no API keys, no rate limits, and no subscriptions required. The endpoint accepts POST requests and returns application/json.\n\nHowever, the specific functionality of `/api/v1/accounts/144` is unclear. The site's landing page lists various API categories (metrics, reports, sentiment analysis, summarization, price feeds, geocoding, etc.) but does not document this particular accounts endpoint. The docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further documentation. Without an OpenAPI spec, request/response schemas, or detailed docs, the actual data returned by this endpoint remains unknown.","tags":[],"capabilities":["x402-payment","per-call-billing","usdc-base-network","json-response","no-api-key","post-method"],"categories":["api","data"],"synonyms":["premium API","pay-per-call API","x402 endpoint","USDC API","Base network API","lowpaymentfee","micropayment API"],"warnings":["The specific functionality of /api/v1/accounts/144 is not documented anywhere in the crawled material.","No OpenAPI spec, request schema, or response schema is available.","All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no useful content.","The accounts endpoint does not appear in the site's own listed API catalog, raising questions about what it actually returns."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/144","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/144","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, confirming pricing and network. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and the specific purpose of /api/v1/accounts/144 is undocumented. The docs pages render only a wallet-connect prompt. This is effectively a stub 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'0.02':12,28,80,110 '000':106 '0x8335':98 '20':105 '2913':99 '6':114 'Base network API' 'USDC API' 'accept':95,140 'access':7,23,40 'account':178 'actual':207 'advertis':62 'ai':69 'amount':103 'analysi':166 'analyt':68 'api':6,22,39,129,161,184 'appear':50 'application/json':145 'base':9,25,93,107 'broad':64 'call':4,20,121 'catalog':65 'categori':162 'challeng':85 'confirm':86 'connect':190 'contract':97 'data':67,208 'decim':115 'detail':204 'doc':181,205 'document':175,196 'endpoint':34,56,88,139,179,212 'etc':171 'exact':125 'feed':169 'financ':72 'function':149 'geocod':170 'given':111 'howev':146 'i.e':109 'infrastructur':75 'json-response' 'key':130 'land':157 'learn':71 'limit':133 'list':159 'live':90 'lowpaymentfee' 'lowpaymentfee.com':36 'machin':70 'made':118 'mani':55 'max':102 'metric':163 'micropayment API' 'network':94 'no-api-key' 'offer':57 'one':53 'openapi':199 'page':158,185 'particular':177 'path':48 'pay':2,18 'pay-per-cal':1,17 'pay-per-call API' 'payment':44,116 'per':3,13,19,29,81,120 'per-cal':119 'per-call-billing' 'platform':60 'post':141 'post-method' 'premium':5,21,38 'premium API' 'price':78,168,182 'prompt':192 'protocol':45 'provid':37 'rate':132 'remain':213 'render':187 'report':164 'request':14,30,82,142 'request/response':201 'requir':137 'return':144,209 'schema':202 'scheme':126 'sentiment':165 'site':155 'span':66 'spec':200 'specif':47,148 'subscript':136 'summar':167 'unclear':153 'unit':108 'unknown':214 'usdc':16,32,96,112 'usdc-base-network' 'util':76 'various':160 'via':10,26,41,122 'wallet':191 'web3':73 'without':197 'x402':11,27,43,84,124 'x402 endpoint' 'x402-payment'","prices":[{"id":"cf743add-ba6f-45ee-8fa5-d83c8e1c1f5c","listingId":"360c87f8-cc16-4008-a685-11be74b482b5","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/144","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:04.782Z"}],"sources":[{"listingId":"360c87f8-cc16-4008-a685-11be74b482b5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/144","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:04.782Z","lastSeenAt":"2026-04-22T16:30:59.610Z"}],"details":{"listingId":"360c87f8-cc16-4008-a685-11be74b482b5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/144 \\\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 returns 402 with x402 challenge on Base network accepting USDC at max 20000 base units","source_url":"https://lowpaymentfee.com/api/v1/accounts/144"},{"claim":"Platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/144"}],"useCases":["Accessing premium data or account information via a single paid API call","Integrating pay-per-use API access into agent workflows without managing API keys","Programmatic access to services on the Base L2 network settled in USDC"],"bestFor":["Agents or developers who want keyless, pay-per-call API access","Use cases requiring low-friction micropayments ($0.02) per request","x402-compatible clients on the Base network"],"notFor":["Users who need detailed documentation or well-defined request/response schemas before integrating","High-volume use cases where per-call pricing may add up compared to subscription models","Users without USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:34.266Z"},"updatedAt":"2026-04-22T16:30:59.610Z"}}