{"id":"118c3059-886c-4b96-acd4-f67b1c21a651","shortId":"cVnfgY","kind":"x402","title":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.","description":"This endpoint (endpoint-72) is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs settled via the x402 protocol on the Base network using USDC. The specific endpoint is labeled \"Premium API Access\" and accepts POST requests, returning application/json responses. Payment is 20,000 base units of USDC (6 decimals), which equals $0.02 per request.\n\nThe broader platform advertises 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 (geocoding, validation, conversion, generation). All endpoints are priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.\n\nNote that this specific endpoint (endpoint-72) does not correspond to any of the named endpoints listed on the site's landing page. Its exact functionality beyond \"Premium API Access\" is undocumented. The docs, API, pricing, and README pages all returned only a \"Connect wallet\" prompt with no additional technical documentation or schema information.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","no-api-key","post-method"],"categories":["general","infrastructure"],"synonyms":["premium api","pay per call api","x402 endpoint","micropayment api","usdc api","base network api","lowpaymentfee"],"warnings":["Endpoint-72 is not listed among the named endpoints on the landing page; its specific functionality is unknown.","All documentation pages (docs, API, pricing, README) returned only 'Connect wallet' with no technical content.","No OpenAPI spec, input schema, or response examples are available.","Exact behavior and data returned by this endpoint cannot be verified."],"endpointUrl":"https://lowpaymentfee.com/api/endpoint-72","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/endpoint-72","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation of what endpoint-72 actually does, no input/output schema, no examples, and the docs pages are empty. The listing is effectively a stub with only payment metadata 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'/request':16,34 '0.02':15,33,95,143 '000':86 '20':85 '6':91 'accept':77 'access':7,25,75,187 'across':103 'addit':206 'advertis':101 'ai':113 'analysi':117 'analyt':107 'api':6,24,56,74,148,186,192 'application/json':81 'base':9,27,64,87 'base network api' 'base-network' 'beyond':184 'broader':99 'call':4,22 'categori':105 'classif':120 'collect':50 'commit':156 'connect':201 'convers':136 'correspond':167 'data':106,110 'decim':92 'doc':191 'document':208 'embed':121 'endpoint':38,39,70,102,139,162,163,173 'equal':94 'estim':131 'exact':182 'exchang':126 'export':111 'feed':125 'financ':122 'four':104 'function':183 'gas':130 'generat':137 'geocod':134 'inform':211 'infrastructur':133 'insight':112 'json-response' 'key':149 'label':72 'land':179 'learn':115 'limit':152 'list':174 'lowpaymentfee' 'lowpaymentfee.com':45 'machin':114 'metric':108 'micropayment api' 'minimum':155 'name':172 'network':10,28,65 'no-api-key' 'note':158 'offer':48 'page':180,196 'part':42 'pay':2,20,53 'pay per call api' 'pay-per-cal':1,19 'pay-per-request':52 'payment':83 'per':3,21,54,96,144 'platform':46,100 'post':78 'post-method' 'premium':5,23,73,185 'premium api' 'price':124,141,193 'prompt':203 'protocol':13,31,61 'quot':129 'rate':127,151 'readm':195 'report':109 'request':55,79,97,145 'requir':157 'respons':82 'return':80,198 'schema':210 'sentiment':116 'settl':57 'site':177 'specif':69,161 'summar':119 'technic':207 'text':118 'token':128 'undocu':189 'unit':88 'usdc':18,36,67,90 'usdc api' 'usdc-settlement' 'use':66 'valid':135 'via':11,29,58 'wallet':202 'web3':123 'x402':12,30,60 'x402 endpoint' 'x402-payment'","prices":[{"id":"598eb7b9-34e9-4745-ba2c-f7da25ff693c","listingId":"118c3059-886c-4b96-acd4-f67b1c21a651","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/endpoint-72","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:37.938Z"}],"sources":[{"listingId":"118c3059-886c-4b96-acd4-f67b1c21a651","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/endpoint-72","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:37.938Z","lastSeenAt":"2026-04-22T15:00:38.723Z"}],"details":{"listingId":"118c3059-886c-4b96-acd4-f67b1c21a651","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/endpoint-72 \\\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 challenge requesting 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/endpoint-72"},{"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":"The platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API services without subscription or API key management","Making one-off paid API calls settled instantly on Base L2","Agent-driven workflows requiring programmatic pay-per-use access"],"bestFor":["Developers wanting zero-commitment pay-per-call API access","AI agents that can settle x402 payments autonomously","Users who prefer crypto-native micropayments over traditional billing"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","High-volume use cases where per-call pricing becomes expensive","Users without access to USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:50.125Z"},"updatedAt":"2026-04-22T15:00:38.723Z"}}