{"id":"43853c05-59aa-4089-a8b0-66b6c564a76d","shortId":"LLGDGZ","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. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a collection of pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are priced at $0.02 per request, settled in USDC on the Base network, with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/accounts/166` is listed as \"Premium API Access\" but its exact functionality is not documented in the available crawl material. The platform's landing page lists sibling 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 — but `/api/v1/accounts/166` does not appear among them. It may be a user-specific or account-specific resource. The x402 challenge confirms the endpoint is live and accepts POST requests, returning application/json responses.\n\nPayment is handled via the x402 exact scheme: the caller must include an X-PAYMENT header with a USDC payment of up to 20,000 base units (i.e., $0.02, since USDC uses 6 decimals) to the address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 on Base. The payment timeout is 300 seconds.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-api","no-api-key","post-method"],"categories":["api-marketplace","infrastructure"],"synonyms":["lowpaymentfee","low payment fee API","x402 premium API","pay-per-call API","USDC micropayment API","Base network API"],"warnings":["The endpoint /api/v1/accounts/166 is not listed among the platform's documented APIs — its purpose and response format are unknown.","Documentation pages (/docs, /pricing, /README, /api) returned no meaningful content beyond 'Connect wallet'.","No request or response schema is available; callers must discover behavior empirically.","The 'accounts/166' path suggests a user- or account-specific resource that may not be generally useful."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/166","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/166","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation for what /api/v1/accounts/166 actually returns, no request/response schema, and the crawled docs/pricing/README pages are all blank beyond a 'Connect wallet' prompt. The specific endpoint doesn't appear in the platform's own API listing, making its purpose 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'/request':13,28 '0.02':12,27,81,220 '000':216 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':229 '20':215 '300':236 '6':224 'Base network API' 'USDC micropayment API' 'accept':185 'access':7,22,38,111 'account':173 'account-specif':172 'address':228 'ai':68 'among':162 'analysi':139 'analyt':67 'api':6,21,37,64,93,110 'appear':161 'application/json':189 'avail':121 'base':9,24,89,217,231 'call':4,19 'caller':200 'challeng':178 'classif':142 'collect':58 'commit':100 'confirm':179 'convers':154 'crawl':122 'data':66,135 'decim':225 'document':118 'embed':143 'endpoint':32,49,77,104,131,181 'estim':151 'exact':114,197 'exchang':146 'export':136 'feed':145 'financ':71 'function':115 'gas':150 'generat':156 'geocod':152 'handl':193 'header':207 'host':56 'i.e':219 'includ':202 'infrastructur':74 'insight':137 'json-api' 'key':94 'land':127 'learn':70 'limit':97 'list':107,129 'live':183 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':34,53 'machin':69 'mani':48 'materi':123 'may':165 'metric':133 'must':201 'network':90 'no-api-key' 'offer':50 'one':46 'page':128 'pay':2,17,61 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':60 'payment':42,191,206,211,233 'per':3,18,62,82 'platform':54,125 'post':186 'post-method' 'premium':5,20,36,109 'price':79,144 'protocol':43 'provid':35 'quot':149 'rate':96,147 'report':134 'request':63,83,187 'requir':101 'resourc':175 'respons':190 'return':188 'scheme':198 'second':237 'sentiment':138 'settl':84 'sibl':130 'sinc':221 'span':65 'specif':103,170,174 'summar':141 'text':140 'timeout':234 'token':148 'unit':218 'usdc':15,30,86,210,222 'usdc-base' 'use':223 'user':169 'user-specif':168 'util':75 'valid':153 'via':10,25,39,194 'web3':72 'x':205 'x-payment':204 'x402':11,26,41,177,196 'x402 premium API' 'x402-payment'","prices":[{"id":"d56f11e1-b536-419e-a253-08e9433a3966","listingId":"43853c05-59aa-4089-a8b0-66b6c564a76d","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/166","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:21.691Z"}],"sources":[{"listingId":"43853c05-59aa-4089-a8b0-66b6c564a76d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/166","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:21.691Z","lastSeenAt":"2026-04-23T06:04:01.150Z"}],"details":{"listingId":"43853c05-59aa-4089-a8b0-66b6c564a76d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/166 \\\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, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units in USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/166"},{"claim":"Platform offers endpoints for analytics, AI/ML, finance/Web3, and infrastructure utilities","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data with per-request USDC micropayments on Base","Programmatic account data retrieval without API key management","Agent-driven API consumption with built-in x402 payment flow"],"bestFor":["Developers who want keyless, pay-as-you-go API access","AI agents that can settle x402 payments in USDC on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible USDC wallet or x402 client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:33.386Z"},"updatedAt":"2026-04-23T06:04:01.150Z"}}