{"id":"d9066a9e-2137-41f2-abd3-6798f5e91be5","shortId":"rdUHWe","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 resource `/api/v1/accounts/141` is one of many endpoints offered by the platform, which spans data & analytics, AI & machine learning, finance & Web3, and infrastructure utility categories. All endpoints are priced at $0.02 per request, paid in USDC on the Base network with no API keys, rate limits, or commitments required.\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract 0x8335…2913 on Base). The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per call. Payment is made via the `exact` scheme with a 300-second timeout. The response MIME type is `application/json`.\n\nThe specific functionality behind `/api/v1/accounts/141` is not documented — the endpoint name \"Premium API Access\" is generic and the crawled documentation pages returned only wallet-connect stubs with no further detail. The platform lists sibling endpoints for metrics, reports, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and generation, all at the same $0.02 price point. Without deeper documentation or example responses, the exact data returned by this particular accounts endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","no-api-key","post-method"],"categories":["api-marketplace","infrastructure"],"synonyms":["lowpaymentfee","low payment fee API","x402 premium API","pay-per-call API","USDC API access","Base network API","micropayment API"],"warnings":["The exact purpose and response format of /api/v1/accounts/141 is not documented anywhere in the crawled material.","All documentation, pricing, API, and README pages returned only 'Connect wallet' with no usable content.","No OpenAPI spec, no example requests or responses, and no input schema available.","The platform lists many diverse endpoints (AI, finance, geocoding, etc.) all at $0.02 — unclear if all are fully functional or placeholders."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/141","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/141","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but the specific functionality of /api/v1/accounts/141 is undocumented. No OpenAPI schema, no example requests/responses, and all docs pages returned only a wallet-connect stub. The endpoint is effectively a stub 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'/request':13,28 '0.02':12,27,75,130,209 '000':121 '0x8335':111 '20':120 '2913':112 '300':142 '6':126 'Base network API' 'USDC API access' 'accept':102 'access':7,22,38,164 'account':225 'ai':61 'amount':117 'analysi':191 'analyt':60 'api':6,21,37,87,163 'application/json':150 'base':9,24,83,114,122 'behind':154 'call':4,19,132 'categori':69 'challeng':96 'classif':194 'commit':92 'confirm':97 'connect':176 'contract':110 'convers':202 'crawl':169 'data':59,220 'decim':127 'deeper':213 'detail':181 'document':158,170,214 'embed':195 'endpoint':32,52,71,99,160,186,226 'equal':129 'exact':138,219 'exampl':216 'exchang':198 'feed':197 'financ':64 'function':153 'generat':204 'generic':166 'geocod':200 'infrastructur':67 'json-response' 'key':88 'learn':63 'limit':90 'list':184 'live':101 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':62 'made':135 'mani':51 'maximum':116 'metric':188 'micropayment API' 'mime':147 'name':161 'network':84 'no-api-key' 'offer':53 'one':49 'page':171 'paid':78 'particular':224 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payment':42,107,133 'per':3,18,76,131 'platform':56,183 'point':211 'post':103 'post-method' 'premium':5,20,36,162 'price':73,196,210 'protocol':43 'provid':35 'rate':89,199 'remain':227 'report':189 'request':77,104 'requir':93,118 'resourc':46 'respons':146,217 'return':172,221 'scheme':139 'second':143 'sentiment':190 'settl':106 'sibl':185 'span':58 'specif':45,152 'stub':177 'summar':193 'text':192 'timeout':144 'type':148 'unclear':228 'unit':123 'usdc':15,30,80,109,125 'usdc-base' 'util':68 'valid':201 'via':10,25,39,136 'wallet':175 'wallet-connect':174 'web3':65 'without':212 'x402':11,26,41,95 'x402 premium API' 'x402-payment'","prices":[{"id":"097f0a88-9bd2-4450-9588-835933d663c6","listingId":"d9066a9e-2137-41f2-abd3-6798f5e91be5","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/141","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:07.872Z"}],"sources":[{"listingId":"d9066a9e-2137-41f2-abd3-6798f5e91be5","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/141","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:07.872Z","lastSeenAt":"2026-04-23T07:30:58.293Z"}],"details":{"listingId":"d9066a9e-2137-41f2-abd3-6798f5e91be5","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/141 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge requiring 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/141"},{"claim":"All endpoints priced at $0.02 per request with no API keys, rate limits, or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/accounts/141"},{"claim":"Platform offers endpoints across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API data with per-request USDC micropayments on Base","Agent-driven API consumption without pre-registration or API keys","Programmatic account data retrieval via x402 payment protocol"],"bestFor":["Developers wanting zero-commitment pay-per-call API access","AI agents that can settle x402 payments in USDC on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible USDC wallet","High-volume consumers who would benefit from bulk pricing or subscriptions"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:34.239Z"},"updatedAt":"2026-04-23T07:30:58.293Z"}}