{"id":"238dba4a-3607-47b5-a283-a01c0cb3a80a","shortId":"qnH4pM","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 at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. It accepts POST requests and charges 20,000 base units of USDC (USD Coin, 6 decimals) on the Base network, which equates to $0.02 per request. The endpoint is live and returns a standard x402 challenge when called without payment.\n\nThe broader lowpaymentfee.com platform advertises multiple API categories including 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. The platform emphasizes no API keys, no rate limits, instant access, and settlement on the Base network.\n\nHowever, the specific endpoint `/api/v1/generate/resource/90` does not clearly map to any of the named APIs on the landing page. Its description is simply \"Premium API Access\" with no further documentation on input parameters, expected request body format, or response structure. The docs, pricing, and README pages all returned only a \"Connect wallet\" prompt with no substantive content. Without documentation or examples, the actual functionality behind this endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","post-method"],"categories":["infrastructure","api-gateway"],"synonyms":["x402 api","pay-per-call api","micropayment api","usdc api access","base network api","lowpaymentfee","crypto-paid api"],"warnings":["No documentation available — docs, pricing, and README pages only show 'Connect wallet'","The endpoint path /api/v1/generate/resource/90 does not correspond to any named API on the landing page","No input schema or output schema documented; actual functionality is unknown","No examples of successful responses available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/generate/resource/90","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/90","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 valid 402 challenge) and pricing is clear ($0.02 USDC on Base), but there is no documentation on what this endpoint actually does, no input/output schema, no examples, and the docs pages are empty. The specific resource path '/api/v1/generate/resource/90' is not explained anywhere on the 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'/request':16,34,140 '0.02':15,33,73,139 '000':57 '20':56 '6':64 'accept':51 'access':7,25,44,153,185 'actual':222 'advertis':94 'ai':106 'analysi':110 'analyt':100 'api':6,24,43,96,147,174,184 'base':9,27,58,68,158 'base network api' 'base-network' 'behind':224 'bodi':195 'broader':91 'call':4,22,87 'categori':97 'challeng':85 'charg':55 'classif':113 'clear':167 'coin':63 'connect':210 'content':216 'convers':130 'crypto-paid api' 'data':99,103 'decim':65 'descript':180 'doc':201 'document':189,218 'embed':114 'emphas':145 'endpoint':38,77,133,163,226 'equat':71 'estim':124 'exampl':220 'exchang':119 'expect':193 'export':104 'feed':118 'financ':115 'format':196 'function':223 'gas':123 'generat':131 'geocod':128 'howev':160 'includ':98 'infrastructur':126 'input':191 'insight':105 'instant':152 'key':148 'land':177 'learn':108 'limit':151 'list':135 'live':79 'lowpaymentfee' 'lowpaymentfee.com':40,92 'machin':107 'map':168 'metric':101 'micropayment api' 'multipl':95 'name':173 'network':10,28,69,159 'no-api-key' 'page':178,205 'paramet':192 'pay':2,20 'pay-per-cal':1,19 'pay-per-call api' 'pay-per-request' 'payment':48,89 'per':3,21,74 'platform':93,144 'point':142 'post':52 'post-method' 'premium':5,23,42,183 'price':117,141,202 'prompt':212 'protocol':13,31,49 'provid':41 'quot':122 'rate':120,150 'readm':204 'remain':227 'report':102 'request':53,75,194 'respons':198 'return':81,207 'sentiment':109 'settlement':155 'simpli':182 'specif':162 'standard':83 'structur':199 'substant':215 'summar':112 'text':111 'token':121 'unclear':228 'unit':59 'usd':62 'usdc':18,36,61 'usdc api access' 'usdc-settlement' 'util':127 'valid':129 'via':11,29,45 'wallet':211 'web3':116 'without':88,217 'x402':12,30,47,84 'x402 api' 'x402-payment'","prices":[{"id":"ab477b8e-9de7-4186-8123-38b930d3fe36","listingId":"238dba4a-3607-47b5-a283-a01c0cb3a80a","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/90","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:11.243Z"}],"sources":[{"listingId":"238dba4a-3607-47b5-a283-a01c0cb3a80a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/generate/resource/90","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:11.243Z","lastSeenAt":"2026-04-24T12:02:50.294Z"}],"details":{"listingId":"238dba4a-3607-47b5-a283-a01c0cb3a80a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/generate/resource/90 \\\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":"Endpoint returns x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/90"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/generate/resource/90"}],"useCases":["Programmatic access to premium API resources without subscription or API key management","Agent-driven workflows that need on-demand paid API calls settled in USDC on Base","Testing x402 protocol integrations with a low-cost endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","AI agents needing keyless, pay-per-use API access","Low-volume consumers who want no commitments or rate limits"],"notFor":["Users who need detailed API documentation or guaranteed SLAs","High-volume production workloads where $0.02/request adds up without bulk discounts","Anyone who cannot transact in USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:48.634Z"},"updatedAt":"2026-04-24T12:02:50.294Z"}}