{"id":"e71cc640-bbf3-4504-be54-fcccea130a25","shortId":"CSkB6D","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 marketplace 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/generate/resource/86` is listed as \"Premium API Access\" and accepts POST requests. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0x8335…), which equals $0.02 per call (USDC uses 6 decimals). No API keys or rate limits are required — callers simply attach an x402 payment header to each request.\n\nThe broader platform advertises four categories of endpoints: 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 listed endpoints share the same $0.02/request pricing.\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawl. The specific functionality behind `/api/v1/generate/resource/86` (labeled \"Premium API Access\") is unclear and cannot be determined from available materials. The endpoint is confirmed live via a valid 402 challenge response.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-micropayment","post-endpoint","no-api-key","no-rate-limit"],"categories":["api-marketplace","infrastructure"],"synonyms":["lowpaymentfee","low payment fee API","x402 micropayment API","pay-per-request API","USDC API access","Base network API","premium API access"],"warnings":["No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no content","No OpenAPI or schema definition found for any endpoint","The specific functionality of /api/v1/generate/resource/86 ('Premium API Access') is undocumented and unknown","Cannot verify what data or service is actually returned upon successful payment","All non-root crawled pages returned minimal content, suggesting the platform may be early-stage or incomplete"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/86","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/generate/resource/86","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documentation, no request/response schemas, and no examples. The actual functionality of resource/86 is entirely opaque. The docs, pricing, and README pages are empty beyond a wallet-connect 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'/api/v1/generate/resource/86':67,213 '/docs':175 '/pricing':176 '/readme':179 '/request':17,34,168 '0.02':16,33,95,167 '000':87 '0x8335':92 '20':86 '402':235 '6':100 'Base network API' 'USDC API access' 'accept':75 'access':45,73,217 'advertis':123 'ai':10,27,135 'analysi':139 'analyt':129 'api':4,21,41,72,103,216 'attach':112 'avail':205,225 'base':7,24,61,88 'behind':51,212 'broader':121 'call':97 'caller':110 'cannot':221 'categori':125 'challeng':80,236 'classif':142 'confirm':230 'connect':185 'content':191 'convers':159 'cost':84 'crawl':208 'data':9,26,128,132 'decim':101 'determin':223 'document':170,200 'embed':143 'endpoint':14,31,50,65,127,163,228 'equal':94 'estim':153 'exampl':204 'exchang':148 'export':133 'extrem':172 'feed':147 'financ':11,28,144 'four':124 'function':211 'gas':152 'gate':3,20,44 'generat':160 'geocod':157 'header':116 'indic':81 'infrastructur':155 'insight':134 'key':104 'label':214 'learn':137 'limit':107 'list':69,162 'live':231 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':35 'machin':136 'marketplac':42 'materi':226 'maximum':83 'metric':130 'micropay':55 'network':62 'no-api-key' 'no-rate-limit' 'offer':8,25 'openapi':195 'page':180 'pay-per-request API' 'payment':115 'per':53,96 'per-request':52 'per-request-micropayment' 'platform':5,22,122 'post':76 'post-endpoint' 'premium':71,215 'premium API access' 'price':146,169 'prompt':187 'protocol':40 'quot':151 'rate':106,149 'render':182 'report':131 'request':54,77,119 'request/response':198 'requir':109 'respons':237 'schema':199 'sentiment':138 'settl':56 'share':164 'simpli':111 'spars':173 'spec':196 'specif':64,210 'summar':141 'text':140 'token':150 'unclear':219 'unit':89 'usag':203 'usdc':58,91,98 'usdc-base' 'use':99 'util':13,30,156 'valid':158,234 'varieti':48 'via':232 'wallet':186 'web3':145 'x402':2,19,39,79,114 'x402 micropayment API' 'x402-gated':1,18 'x402-payment' 'x402-protocol':38","prices":[{"id":"40d47b48-326b-4d52-8f9d-8c90b45cd1d8","listingId":"e71cc640-bbf3-4504-be54-fcccea130a25","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/generate/resource/86","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:13.681Z"}],"sources":[{"listingId":"e71cc640-bbf3-4504-be54-fcccea130a25","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/86","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:13.681Z","lastSeenAt":"2026-04-23T16:30:38.989Z"}],"details":{"listingId":"e71cc640-bbf3-4504-be54-fcccea130a25","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/86 \\\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 x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/86"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Four categories of endpoints are listed: Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Paying per-request for API access without needing API keys or subscriptions","Integrating micropayment-gated endpoints into autonomous agent workflows","Accessing utility or generation services via x402 protocol on Base"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go API access","AI agents that can settle x402 payments autonomously on Base","Projects needing low-cost per-call API access without signup"],"notFor":["Users who need detailed API documentation or schemas 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":"2026-02-17T23:14:48.519Z"},"updatedAt":"2026-04-23T16:30:38.989Z"}}