{"id":"40ddb076-f9e7-4782-bfa8-6ae5e229c8a1","shortId":"kLthCh","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 is one of many endpoints offered by the platform, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform are priced at $0.02 per request, paid in USDC on the Base network with no API keys, rate limits, or commitments required.\n\nThe specific endpoint `/api/v1/benefits/11` is labeled \"Premium API Access\" but its exact functionality is not documented beyond that title. The x402 challenge confirms it accepts POST requests, charges a maximum of 20,000 base units of USDC (i.e., $0.02 given 6 decimals), and settles payments to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 on the Base network. The response MIME type is application/json.\n\nThe platform's documentation pages are minimal (showing only a \"Connect wallet\" prompt), so detailed request/response schemas for this specific endpoint are unavailable. The broader site advertises a suite of APIs covering metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","json-response","no-api-key","no-rate-limit"],"categories":["general","infrastructure"],"synonyms":["premium api","lowpaymentfee","x402 api","micropayment api","base network api","usdc pay-per-call","402 payment endpoint"],"warnings":["No documentation available for /api/v1/benefits/11 — exact functionality unknown","All doc/pricing/API pages on the site only show 'Connect wallet' with no further content","The endpoint name 'Premium API Access' is vague and may be a placeholder or generic label","Cannot verify what data or service is actually returned upon successful payment"],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/11","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/11","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 confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation of what this specific endpoint actually returns, no request/response schema, and the docs pages are empty. The 'Premium API Access' label is generic and 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'/request':16,34 '0.02':15,33,82,139,219 '000':133 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':148 '20':132 '402 payment endpoint' '6':141 'accept':125 'access':7,25,44,109 'address':147 'advertis':185 'ai':66 'analysi':197 'analyt':65 'api':6,24,43,94,108,189 'application/json':158 'base':9,27,90,134,151 'base network api' 'beyond':117 'broader':183 'call':4,22 'categori':62 'challeng':122 'charg':128 'classif':200 'commit':99 'confirm':123 'connect':169 'convers':212 'cover':190 'data':64,193 'decim':142 'detail':173 'document':116,162 'embed':201 'endpoint':38,55,75,103,179 'estim':209 'exact':112 'exchang':204 'export':194 'feed':203 'financ':69 'function':113 'gas':208 'generat':214 'geocod':210 'given':140 'i.e':138 'includ':63 'infrastructur':72 'insight':195 'json-response' 'key':95 'label':106 'learn':68 'limit':97 'lowpaymentfee' 'lowpaymentfee.com':40 'machin':67 'mani':54 'maximum':130 'metric':191 'micropayment api' 'mime':155 'minim':165 'network':10,28,91,152 'no-api-key' 'no-rate-limit' 'offer':56 'one':52 'page':163 'paid':85 'pay':2,20 'pay-per-cal':1,19 'pay-per-request' 'payment':48,145 'per':3,21,83 'platform':59,78,160 'point':221 'post':126 'premium':5,23,42,107 'premium api' 'price':80,202,220 'prompt':171 'protocol':13,31,49 'provid':41 'quot':207 'rate':96,205 'report':192 'request':84,127 'request/response':174 'requir':100 'respons':154 'schema':175 'sentiment':196 'settl':144 'show':166 'site':184 'span':61 'specif':102,178 'suit':187 'summar':199 'text':198 'titl':119 'token':206 'type':156 'unavail':181 'unit':135 'usdc':18,36,87,137 'usdc pay-per-call' 'usdc-base-network' 'util':73 'valid':211 'via':11,29,45 'wallet':170 'web3':70 'x402':12,30,47,121 'x402 api' 'x402-payment'","prices":[{"id":"4f598af1-dabe-40d0-b225-57e01c27d252","listingId":"40ddb076-f9e7-4782-bfa8-6ae5e229c8a1","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/11","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:23.307Z"}],"sources":[{"listingId":"40ddb076-f9e7-4782-bfa8-6ae5e229c8a1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/11","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:23.307Z","lastSeenAt":"2026-04-22T07:01:47.567Z"}],"details":{"listingId":"40ddb076-f9e7-4782-bfa8-6ae5e229c8a1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/11 \\\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 endpoint charges a maximum of 20,000 base units of USDC (USD Coin) on Base network","source_url":"https://lowpaymentfee.com/api/v1/benefits/11"},{"claim":"All endpoints on the platform are priced at $0.02 per request with no API keys, rate limits, or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing premium API features without subscription or API key management","Agent-driven workflows that need on-demand paid API calls settled in USDC","Testing x402 payment protocol integrations on Base network"],"bestFor":["Developers wanting zero-commitment pay-per-use API access","AI agents with crypto wallets needing programmatic API consumption","Projects requiring no-signup instant API access on Base"],"notFor":["Users who need detailed API documentation or OpenAPI specs before integrating","High-volume use cases where $0.02/request adds up significantly","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.038Z"},"updatedAt":"2026-04-22T07:01:47.567Z"}}