{"id":"a8744742-4dbb-46c1-b1f7-d599593fd773","shortId":"PwwQTp","kind":"x402","title":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","tagline":"Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.","description":"lowpaymentfee.com is an x402-enabled API platform that provides a broad catalog of pay-per-request endpoints settled in USDC on the Base network. The specific endpoint at `/api/resource/24` is labeled \"Premium API Access\" and accepts POST requests with payment via the x402 protocol. The 402 challenge for this endpoint advertises a maximum cost of 20,000 base units of USDC (0.02 USD) per call.\n\nThe broader platform lists 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 listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.\n\nNote that the specific endpoint `/api/resource/24` does not clearly map to any of the named endpoints on the landing page. There is no OpenAPI schema, no detailed documentation for request/response formats, and the crawled sub-pages (api, pricing, README) returned only a \"Connect wallet\" prompt with no additional content. The actual functionality behind this particular resource ID is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-method","json-response"],"categories":["api-platform","data","llm","finance","geo"],"synonyms":["x402 API","pay-per-call API","USDC API","Base network API","micropayment API","lowpaymentfee","low payment fee"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The resource path /api/resource/24 does not correspond to any named endpoint on the landing page — its actual functionality is unknown","No request body schema or response examples are documented anywhere","Sub-pages (/api, /pricing, /README) returned only 'Connect wallet' with no content"],"endpointUrl":"https://lowpaymentfee.com/api/resource/24","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/resource/24","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 captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no request/response documentation, and the specific resource '/api/resource/24' has no described functionality. Sub-pages returned no useful content. Effectively a stub 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'/request':19,38 '0.02':18,37,102,153 '000':97 '20':96 '402':86 'Base network API' 'USDC API' 'accept':76 'access':74 'across':111 'actual':219 'addit':216 'advertis':91 'ai':12,31,121 'analysi':125 'analyt':115 'api':5,24,45,73,158,205 'base':8,27,63,98 'base-network' 'behind':221 'broad':50 'broader':107 'call':4,23,105 'catalog':51 'categori':113 'challeng':87 'classif':128 'clear':176 'commit':166 'connect':211 'content':217 'convers':145 'cost':94 'crawl':201 'data':11,30,114,118 'detail':194 'document':195 'embed':129 'enabl':44 'endpoint':16,35,57,67,90,110,149,172,183 'estim':139 'exchang':134 'export':119 'feed':133 'financ':13,32,130 'format':198 'four':112 'function':220 'gas':138 'generat':146 'geocod':143 'id':225 'infrastructur':141 'insight':120 'json-response' 'key':159 'label':71 'land':186 'learn':123 'limit':162 'list':109,148 'low payment fee' 'lowpaymentfee' 'lowpaymentfee.com':39 'machin':122 'map':177 'maximum':93 'metric':116 'micropayment API' 'minimum':165 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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/resource/24","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:31.430Z"}],"sources":[{"listingId":"a8744742-4dbb-46c1-b1f7-d599593fd773","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/resource/24","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:31.430Z","lastSeenAt":"2026-04-22T04:02:45.841Z"}],"details":{"listingId":"a8744742-4dbb-46c1-b1f7-d599593fd773","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/resource/24 \\\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 advertises maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/resource/24"},{"claim":"All listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints in Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to data analytics and reporting endpoints without subscription","On-demand AI inference (sentiment, summarization, classification, embeddings) paid per call","Fetching real-time financial data and crypto market quotes with micropayments","Geocoding and data conversion utilities with no account setup"],"bestFor":["Agents or bots that need instant, keyless API access paid in USDC","Low-volume or sporadic API consumers who want to avoid subscriptions","Developers prototyping with pay-as-you-go endpoints on Base"],"notFor":["High-volume production workloads where $0.02/request adds up significantly","Users who need detailed API documentation, SDKs, or guaranteed SLAs"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:12:52.421Z"},"updatedAt":"2026-04-22T04:02:45.841Z"}}