{"id":"cfc9771d-d853-48dc-9edf-d9371cb724e9","shortId":"SHpejT","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/v1/generate/resource/92` is listed as \"Premium API Access\" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys or rate limits are advertised; callers pay per request via the x402 payment protocol.\n\nThe platform advertises four categories of APIs: 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\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed documentation for any endpoint. The specific functionality behind `/api/v1/generate/resource/92` (labeled \"Premium API Access\") is unclear and cannot be determined from the available material.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","data-analytics","ai-inference","finance-data","utility-services","json-response"],"categories":["general","ai","finance","infrastructure"],"synonyms":["low payment fee","x402 api","pay per call api","micropayment api","usdc api","base network api","premium api access"],"warnings":["Documentation pages (/docs, /api, /pricing, /README) all return only a 'Connect wallet' prompt with no usable content.","The specific functionality of /api/v1/generate/resource/92 ('Premium API Access') is undocumented and unclear.","No OpenAPI schema or request/response examples are available for any endpoint.","Cannot verify that the advertised AI, finance, and data endpoints actually function as described."],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/92","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/92","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). However, there is no OpenAPI schema, no request/response examples, and documentation pages are empty beyond a wallet connect prompt. The specific purpose of resource/92 is unknown. This is effectively a stub 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'/request':19,38,157 '0.02':18,37,80,156 '000':84 '20':83 '6':90 'access':75,205 'advertis':99,111 'ai':12,31,123 'ai-inference' 'analysi':127 'analyt':117 'api':5,24,45,74,93,115,166,204 'avail':214 'base':8,27,63,85 'base network api' 'base-network' 'behind':200 'broad':50 'call':4,23,82 'caller':100 'cannot':209 'catalog':51 'categori':113 'classif':130 'connect':175 'content':181 'convers':147 'cost':77 'data':11,30,116,120 'data-analytics' 'decim':91 'detail':192 'determin':211 'doc':165 'document':160,193 'embed':131 'enabl':44 'endpoint':16,35,57,67,150,196 'estim':141 'exampl':189 'exchang':136 'export':121 'extrem':162 'feed':135 'financ':13,32,132 'finance-data' 'four':112 'function':199 'gas':140 'generat':148 'geocod':145 'infrastructur':143 'insight':122 'json-response' 'key':94 'label':202 'learn':125 'limit':97 'list':71,152 'low payment fee' 'lowpaymentfee.com':39 'machin':124 'materi':215 'metric':118 'micropayment api' 'network':64 'no-api-key' 'offer':10,29 'openapi':185 'page':170 'pay':2,21,54,101 'pay per call api' 'pay-per-cal':1,20 'pay-per-request':53 'payment':107 'per':3,22,55,81,102 'platform':6,25,46,110 'point':159 'premium':73,203 'premium api access' 'price':134,158,167 'prompt':177 'protocol':108 'provid':48 'quot':139 'rate':96,137 'readm':169 'render':172 'report':119 'request':56,103 'request/response':188 'schema':186 'sentiment':126 'settl':58 'spars':163 'specif':66,198 'summar':129 'text':128 'token':138 'unclear':207 'unit':86 'usdc':9,28,60,88 'usdc api' 'usdc-settlement' 'util':15,34,144 'utility-services' 'valid':146 'via':104 'wallet':176 'web3':133 'x402':43,106 'x402 api' 'x402-enabled':42 'x402-payment'","prices":[{"id":"05911f38-6c32-4a8c-82ca-c055333ac99f","listingId":"cfc9771d-d853-48dc-9edf-d9371cb724e9","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/92","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:38:46.556Z"}],"sources":[{"listingId":"cfc9771d-d853-48dc-9edf-d9371cb724e9","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/92","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:38:46.556Z","lastSeenAt":"2026-04-22T10:01:26.833Z"}],"details":{"listingId":"cfc9771d-d853-48dc-9edf-d9371cb724e9","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/92 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -d '{}'","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/generate/resource/92"},{"claim":"All 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 APIs in four categories: Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/92"}],"useCases":["Accessing data analytics and metrics via micropayments without API key management","Running AI inference tasks (sentiment, summarization, classification, embeddings) on a per-call basis","Fetching financial data such as token prices, exchange rates, and gas estimates","Using utility services like geocoding, validation, and data conversion"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go API access","Agents and bots that can settle payments in USDC on Base via x402","Users who prefer no API key registration or rate limit constraints"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","Applications requiring high-throughput with predictable bulk pricing","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:40.849Z"},"updatedAt":"2026-04-22T10:01:26.833Z"}}