{"id":"be7a5aa2-24a5-4cd5-86bc-e07e5db3457d","shortId":"RvNKLX","kind":"x402","title":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-protocol API platform that gates access to a variety of endpoints behind per-request micropayments settled in USDC on the Base network. The specific endpoint at `/api/v1/accounts/25` is listed as \"Premium API Access\" and requires a payment of up to 20,000 base units of USDC (i.e., $0.02) per call. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an x402 payment header to each request.\n\nThe broader platform offers endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at the same $0.02/request price point.\n\nHowever, the specific functionality of the `/api/v1/accounts/25` endpoint is unclear. The description \"Premium API Access\" is generic and no documentation, request schema, or response schema is available. The docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without further documentation it is impossible to confirm what data or service this particular endpoint returns.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","per-request-billing","no-api-key","http-post"],"categories":["api-platform","data"],"synonyms":["x402 API","micropayment API","pay-per-request API","USDC API","Base network API","lowpaymentfee","low payment fee"],"warnings":["No documentation available — docs, API, pricing, and README pages all render only a 'Connect wallet' prompt with no content.","The specific functionality of /api/v1/accounts/25 ('Premium API Access') is undefined; no input or output schema is provided.","No OpenAPI spec, no example requests or responses, and no description of what data is returned.","Platform appears to be a demonstration or early-stage project; endpoint utility is unverified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/accounts/25","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/25","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and the purpose of `/api/v1/accounts/25` is entirely opaque. The docs and other pages returned no useful content beyond 'Connect 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'/request':17,34,162 '0.02':16,33,88,161 '000':82 '20':81 'Base network API' 'USDC API' 'access':45,73,102,179 'across':118 'advertis':93 'ai':10,27,128 'analysi':132 'analyt':122 'api':4,21,41,72,95,178,194 'attach':105 'avail':191 'base':7,24,61,83 'base-network' 'behind':51 'broader':114 'call':90 'caller':103 'categori':120 'classif':135 'confirm':217 'connect':203 'content':209 'convers':152 'data':9,26,121,125,219 'descript':176 'doc':193 'document':184,212 'embed':136 'endpoint':14,31,50,65,117,155,172,224 'estim':146 'exchang':141 'export':126 'feed':140 'financ':11,28,137 'four':119 'function':168 'gas':145 'gate':3,20,44 'generat':153 'generic':181 'geocod':150 'header':109 'howev':165 'http-post' 'i.e':87 'imposs':215 'infrastructur':148 'insight':127 'instant':101 'key':96 'learn':130 'limit':99 'list':69,157 'low payment fee' 'lowpaymentfee' 'lowpaymentfee.com':35 'machin':129 'metric':123 'micropay':55 'micropayment API' 'network':62 'no-api-key' 'offer':8,25,116 'page':198 'particular':223 'pay-per-request API' 'payment':77,108 'per':53,89 'per-request':52 'per-request-billing' 'platform':5,22,42,92,115 'point':164 'premium':71,177 'price':139,163,195 'prompt':205 'protocol':40 'quot':144 'rate':98,142 'readm':197 'report':124 'request':54,112,185 'requir':75 'respons':188 'return':200,225 'schema':186,189 'sentiment':131 'servic':221 'settl':56 'simpli':104 'specif':64,167 'substant':208 'summar':134 'text':133 'token':143 'unclear':174 'unit':84 'usdc':58,86 'usdc-micropayment' 'util':13,30,149 'valid':151 'varieti':48 'wallet':204 'web3':138 'without':210 'x402':2,19,39,107 'x402 API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':38","prices":[{"id":"4d3c4f8a-5437-4aad-8cb9-b5df709417d4","listingId":"be7a5aa2-24a5-4cd5-86bc-e07e5db3457d","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/25","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:39:25.149Z"}],"sources":[{"listingId":"be7a5aa2-24a5-4cd5-86bc-e07e5db3457d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/accounts/25","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:39:25.149Z","lastSeenAt":"2026-04-24T20:02:15.217Z"}],"details":{"listingId":"be7a5aa2-24a5-4cd5-86bc-e07e5db3457d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/accounts/25 \\\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":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/accounts/25"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/accounts/25"}],"useCases":["Accessing premium API data with per-call USDC micropayments on Base","Agent-driven workflows that need keyless, pay-as-you-go API access","Programmatic access to data/analytics/AI/finance endpoints without subscriptions"],"bestFor":["Developers or agents who want zero-commitment, per-request API billing","x402-compatible agents that can attach payment headers automatically","Users who prefer crypto-native micropayments over traditional API key subscriptions"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume consumers who would benefit from bulk pricing or subscription plans","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:38.981Z"},"updatedAt":"2026-04-24T20:02:15.217Z"}}