{"id":"fcb951a7-6505-4c9e-9acb-17fc061546ff","shortId":"Vk9cfq","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol on the Base network. The specific resource `/api/v1/accounts/164` is one of many endpoints offered by the platform, which spans categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, settled in USDC (USD Coin) on Base.\n\nThe x402 challenge confirms the endpoint is live and accepts exact-scheme payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using the USDC contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. The endpoint accepts POST requests and returns `application/json`. No API keys or rate limits are advertised — access is purely pay-per-call.\n\nHowever, the specific functionality behind `/api/v1/accounts/164` is unclear. The landing page lists many other endpoints (analytics, AI, finance, utilities) but does not document this particular accounts path. There is no OpenAPI spec, no request/response schema documentation, and the docs/pricing/README pages all render only a \"Connect wallet\" prompt with no further content. Without knowing what this endpoint actually returns, callers should treat it as an opaque premium resource until more documentation surfaces.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","post-method"],"categories":["api-gateway","payments"],"synonyms":["x402 API","pay-per-call API","USDC micropayment endpoint","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["The specific functionality of /api/v1/accounts/164 is undocumented — the landing page does not list an 'accounts' category among its APIs.","No OpenAPI spec, request schema, or response schema is available.","All documentation pages (docs, pricing, README, api) render only 'Connect wallet' with no useful content.","The purpose of this particular endpoint versus the other listed endpoints is unclear."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/164","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/164","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live and returns a valid x402 challenge, but there is no documentation for what /api/v1/accounts/164 actually does, no request/response schema, and no examples. The docs, pricing, and README pages are all empty beyond a wallet-connect prompt. This is effectively a stub 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'0.02':10,28,86,133 '000':124 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':112 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':117 '20':123 '6':129 'Base network API' 'USDC micropayment endpoint' 'accept':105,136 'access':6,24,44,150 'account':182 'actual':213 'address':111 'advertis':149 'ai':73,173 'amount':120 'analyt':72,172 'api':5,16,23,34,43,143 'application/json':141 'base':8,26,52,95,125 'base-network' 'behind':161 'call':156 'caller':215 'categori':69 'challeng':98 'coin':93 'confirm':99 'connect':201 'content':207 'contract':116 'crypto-paid API' 'data':71 'decim':130 'docs/pricing/readme':195 'document':179,192,226 'endpoint':38,62,82,101,135,171,212 'equal':132 'exact':107 'exact-schem':106 'financ':76,174 'function':160 'gate':3,21 'howev':157 'includ':70 'infrastructur':79 'json-response' 'key':17,35,144 'know':209 'land':166 'learn':75 'limit':147 'list':168 'live':103 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':74 'mani':61,169 'maximum':119 'network':53 'no-api-key' 'offer':63 'one':59 'opaqu':221 'openapi':187 'page':167,196 'particular':181 'path':183 'pay':9,27,154 'pay-per-cal':153 'pay-per-call API' 'pay-per-request' 'payment':48,109 'per':11,29,87,155 'platform':66 'post':137 'post-method' 'premium':4,22,42,222 'premium API access' 'price':84 'prompt':203 'protocol':49 'provid':41 'pure':152 'rate':146 'render':198 'request':12,30,88,138 'request/response':190 'requir':18,36,121 'resourc':56,223 'return':140,214 'schema':191 'scheme':108 'settl':89 'span':68 'spec':188 'specif':55,159 'surfac':227 'treat':217 'unclear':164 'unit':126 'usd':92 'usdc':14,32,91,115,128 'usdc-settlement' 'use':113 'util':80,175 'via':45 'wallet':202 'web3':77 'without':208 'x402':2,20,47,97 'x402 API' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"858056a9-903d-4b61-9d66-8200397ddd6e","listingId":"fcb951a7-6505-4c9e-9acb-17fc061546ff","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/164","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:22.294Z"}],"sources":[{"listingId":"fcb951a7-6505-4c9e-9acb-17fc061546ff","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/164","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:22.294Z","lastSeenAt":"2026-04-24T08:02:46.994Z"}],"details":{"listingId":"fcb951a7-6505-4c9e-9acb-17fc061546ff","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/164 \\\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 a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/164"},{"claim":"Platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/164"},{"claim":"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 managing API keys","Agent-driven workflows that need on-demand paid API calls settled in USDC","Exploring x402 payment protocol integrations on Base"],"bestFor":["Developers experimenting with x402 pay-per-call patterns","AI agents that can autonomously pay for API access via crypto","Users who want no-signup, no-rate-limit API access"],"notFor":["Users who need well-documented request/response schemas before integrating","High-volume consumers who need bulk pricing or subscription plans","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:33.384Z"},"updatedAt":"2026-04-24T08:02:46.994Z"}}