{"id":"3f228413-b447-4a07-ba46-2f42893a59b6","shortId":"tSKACu","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. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a suite of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated behind per-request USDC micropayments on the Base network.\n\nThe specific endpoint `/api/v1/accounts/175` is listed as \"Premium API Access\" and costs $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02). Payment is handled via the x402 exact scheme: callers include an X-PAYMENT header with a signed USDC payment on Base to the specified payTo address. There are no API keys, no rate limits, and no subscription commitments — each call is independently paid for.\n\nThe exact functionality of the `/api/v1/accounts/175` endpoint is not documented beyond the label \"Premium API Access.\" The broader platform advertises 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 — all at the same $0.02 price point. However, the specific behavior of this particular accounts endpoint is unclear from available documentation. The docs, pricing, and API pages behind the site all appear to require a wallet connection and provide no further detail in the crawl.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","per-request-billing","no-api-key","json-response","http-post"],"categories":["api-gateway","payments"],"synonyms":["lowpaymentfee","low payment fee API","x402 premium API","USDC micropayment API","Base network API","pay-per-request API","402 payment API"],"warnings":["The specific functionality of /api/v1/accounts/175 is not documented — 'Premium API Access' is the only description available.","No OpenAPI spec, request schema, or response schema is provided.","All documentation pages (docs, pricing, API, README) resolve to a wallet-connect prompt with no substantive content.","The platform lists many endpoints but none have detailed documentation in the crawl."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/175","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/175","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/request in USDC on Base). However, there is no OpenAPI schema, no documentation of request/response formats, no examples, and the specific purpose of /api/v1/accounts/175 is undocumented beyond the generic label 'Premium API Access.' The docs pages all resolve to a wallet-connect prompt with no 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'0.02':10,28,102,114,210 '000':106 '20':105 '402 payment API' '6':112 'Base network API' 'USDC micropayment API' 'access':6,24,44,99,175 'account':220 'address':141 'advertis':179 'ai':70 'analysi':188 'analyt':69 'api':5,16,23,34,43,66,98,145,174,231 'appear':237 'avail':225 'base':8,26,88,107,136 'base-network' 'behavior':216 'behind':80,233 'beyond':170 'broader':177 'call':155 'caller':123 'classif':191 'commit':153 'connect':242 'convers':203 'cost':101 'crawl':250 'data':68,184 'decim':113 'detail':247 'doc':228 'document':169,226 'embed':192 'endpoint':38,55,92,166,180,221 'estim':200 'exact':121,161 'exchang':195 'export':185 'feed':194 'financ':73 'function':162 'gas':199 'gate':3,21,79 'generat':205 'geocod':201 'handl':117 'header':129 'host':62 'howev':213 'http-post' 'includ':124 'independ':157 'infrastructur':76 'insight':186 'json-response' 'key':17,35,146 'label':172 'learn':72 'limit':149 'list':95 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':40,59 'machin':71 'mani':54 'metric':182 'micropay':85 'network':89 'no-api-key' 'offer':56 'one':52 'page':232 'paid':158 'particular':219 'pay':9,27 'pay-per-request API' 'payment':48,115,128,134 'payto':140 'per':11,29,82,103 'per-request':81 'per-request-billing' 'platform':60,178 'point':212 'premium':4,22,42,97,173 'price':193,211,229 'protocol':49 'provid':41,244 'quot':198 'rate':148,196 'report':183 'request':12,30,83,104 'requir':18,36,239 'scheme':122 'sentiment':187 'sign':132 'site':235 'span':67 'specif':91,215 'specifi':139 'subscript':152 'suit':64 'summar':190 'text':189 'token':197 'unclear':223 'unit':108 'usdc':14,32,84,110,133 'usdc-micropayment' 'util':77 'valid':202 'via':45,118 'wallet':241 'web3':74 'x':127 'x-payment':126 'x402':2,20,47,120 'x402 premium API' 'x402-gated':1,19 'x402-payment'","prices":[{"id":"1a74842a-e588-48a2-b521-4f009852f8ad","listingId":"3f228413-b447-4a07-ba46-2f42893a59b6","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/175","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:41:28.304Z"}],"sources":[{"listingId":"3f228413-b447-4a07-ba46-2f42893a59b6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/175","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:41:28.304Z","lastSeenAt":"2026-04-24T08:32:02.253Z"}],"details":{"listingId":"3f228413-b447-4a07-ba46-2f42893a59b6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/175 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network, with maxAmountRequired of 20000 in USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).","source_url":"https://lowpaymentfee.com/api/v1/accounts/175"},{"claim":"The 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":"The platform offers APIs across Data & Analytics, AI & Machine Learning, 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 pay-as-you-go access to account-level data"],"bestFor":["Developers wanting zero-commitment, pay-per-call API access","AI agents that can settle x402 payments autonomously on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users who need detailed documentation or OpenAPI specs before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:33.132Z"},"updatedAt":"2026-04-24T08:32:02.253Z"}}