{"id":"89f4346b-a67e-42ff-b96f-69b96d12c155","shortId":"P4hvVB","kind":"x402","title":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","tagline":"x402-gated premium API access on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com is part of a suite of x402-protocol pay-per-call APIs hosted on the Base network. The specific resource `/api/v1/benefits/27` is labeled \"Premium API Access\" and returns JSON content. Payment is settled in USDC (contract 0x8335…2913 on Base) via the x402 exact-payment scheme. The maximum amount required per call is 20,000 base units of USDC, which at 6 decimals equals $0.02 USD — consistent with the site's advertised flat pricing of $0.02 per request.\n\nThe broader lowpaymentfee.com 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 utilities (geocoding, validation, conversion, generation). All endpoints share the same $0.02/request pricing with no API keys, no rate limits, and no minimum commitments.\n\nHowever, the specific functionality behind `/api/v1/benefits/27` is not documented — it does not appear in the site's listed API catalog, and the crawled docs, pricing, and README pages returned only a wallet-connect prompt with no additional content. Without documentation or example responses, the actual data or service this particular endpoint provides remains unclear.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-settlement","base-network","json-response","no-api-key","http-post"],"categories":["general","api-marketplace"],"synonyms":["premium API","pay-per-call API","x402 endpoint","USDC micropayment API","lowpaymentfee","Base network API","crypto-paid API"],"warnings":["The endpoint /api/v1/benefits/27 does not appear in the provider's own listed API catalog — its specific functionality is unknown.","Documentation pages (/docs, /pricing, /README, /api) returned no useful content beyond a wallet-connect prompt.","No request or response schema is available; callers cannot know what to send or what to expect back.","The 'Premium API Access' label is generic and does not describe the actual service provided."],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/27","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/benefits/27","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). However, the specific resource /api/v1/benefits/27 is not listed in the site's API catalog, there is no documentation, no request/response schema, and no examples. The docs, pricing, and README pages are effectively empty (wallet-connect only). This is essentially a stub 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'/request':162 '0.02':10,24,100,111,161 '000':90 '0x8335':71 '20':89 '2913':72 '6':97 'Base network API' 'USDC micropayment API' 'access':6,20,60 'across':120 'actual':220 'addit':212 'advertis':107,118 'ai':130 'amount':84 'analysi':134 'analyt':124 'api':5,19,46,59,166,193 'appear':187 'base':8,22,50,74,91 'base-network' 'behind':179 'broader':115 'call':45,87 'catalog':194 'categori':122 'classif':137 'commit':174 'connect':208 'consist':102 'content':64,213 'contract':70 'convers':154 'crawl':197 'crypto-paid API' 'data':123,127,221 'decim':98 'doc':198 'document':183,215 'embed':138 'endpoint':30,119,157,226 'equal':99 'estim':148 'exact':79 'exact-pay':78 'exampl':217 'exchang':143 'export':128 'feed':142 'financ':139 'flat':108 'four':121 'function':178 'gas':147 'gate':3,17 'generat':155 'geocod':152 'host':47 'howev':175 'http-post' 'infrastructur':150 'insight':129 'json':63 'json-response' 'key':167 'label':57 'learn':132 'limit':170 'list':192 'lowpaymentfee' 'lowpaymentfee.com':32,116 'machin':131 'maximum':83 'metric':125 'minimum':173 'network':51 'no-api-key' 'page':202 'part':34 'particular':225 'pay':9,23,43 'pay-per-cal':42 'pay-per-call API' 'pay-per-request' 'payment':65,80 'per':11,25,44,86,112 'platform':117 'premium':4,18,58 'premium API' 'price':109,141,163,199 'prompt':209 'protocol':41 'provid':227 'quot':146 'rate':144,169 'readm':201 'remain':228 'report':126 'request':12,26,113 'requir':85 'resourc':54 'respons':218 'return':62,203 'scheme':81 'sentiment':133 'servic':223 'settl':67 'share':158 'site':105,190 'specif':53,177 'suit':37 'summar':136 'text':135 'token':145 'unclear':229 'unit':92 'usd':101 'usdc':14,28,69,94 'usdc-settlement' 'util':151 'valid':153 'via':75 'wallet':207 'wallet-connect':206 'web3':140 'without':214 'x402':2,16,40,77 'x402 endpoint' 'x402-gated':1,15 'x402-payment' 'x402-protocol':39","prices":[{"id":"dceebd89-605d-4753-9d7f-7a01ef36e715","listingId":"89f4346b-a67e-42ff-b96f-69b96d12c155","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/benefits/27","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:42.225Z"}],"sources":[{"listingId":"89f4346b-a67e-42ff-b96f-69b96d12c155","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/27","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:42.225Z","lastSeenAt":"2026-04-22T05:31:54.125Z"}],"details":{"listingId":"89f4346b-a67e-42ff-b96f-69b96d12c155","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/27 \\\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 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/benefits/27"},{"claim":"USDC contract address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/benefits/27"},{"claim":"Site advertises $0.02/request flat pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The site lists APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Programmatic access to a premium API resource with instant USDC micropayments","Agent-driven workflows that need keyless, pay-as-you-go API access on Base","Testing x402 payment protocol integrations against a live endpoint"],"bestFor":["Developers experimenting with x402 pay-per-call patterns","AI agents that can settle USDC payments on Base automatically","Users who want no-signup, no-API-key access to paid endpoints"],"notFor":["Users who need detailed documentation or guaranteed SLAs before integrating","Anyone without a Base-compatible USDC wallet or x402 client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:26.139Z"},"updatedAt":"2026-04-22T05:31:54.125Z"}}