{"id":"5900ad8d-ed54-4307-b2c4-82c017fae62a","shortId":"ucdNC5","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/38` is labeled \"Premium API Access\" and returns JSON content. Payment is settled in USDC (contract 0x8335…2913 on Base) at a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each POST 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 are listed at the same $0.02/request price point. However, the specific functionality behind `/api/v1/benefits/38` is not documented beyond the generic \"Premium API Access\" label, so the exact data or service it returns is unclear.\n\nThe endpoint is confirmed live: it returns a proper HTTP 402 challenge with x402 version 1 headers. The payment recipient address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, and the maximum timeout for payment settlement is 300 seconds. Documentation on the site is extremely thin — the docs, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-settlement","base-network","json-response","no-api-key","post-method"],"categories":["api-gateway","crypto"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid endpoint"],"warnings":["The specific functionality of /api/v1/benefits/38 ('Premium API Access') is not documented anywhere — it is unclear what data or service this endpoint actually provides.","All documentation pages (docs, pricing, README) render only a 'Connect wallet' prompt with no technical content.","No OpenAPI spec, response schema, or example responses are available.","No input schema is documented; the POST body format is unknown."],"endpointUrl":"https://lowpaymentfee.com/api/v1/benefits/38","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/38","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge, but the actual functionality behind '/api/v1/benefits/38' is completely undocumented. No OpenAPI schema, no response examples, and the docs/pricing/README pages are empty beyond a wallet-connect prompt. The listing is effectively a stub with only pricing and protocol details 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'/request':164 '0.02':10,24,86,163 '000':81 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':215 '0x8335':71 '1':208 '20':80 '2913':72 '300':224 '402':203 '6':91 'Base network API' 'USDC micropayment API' 'access':6,20,60,181 'across':120 'addit':248 'address':213 'advertis':118 'ai':130 'analysi':134 'analyt':124 'api':5,19,46,59,94,180 'attach':105 'base':8,22,50,74,82 'base-network' 'behind':171 'beyond':176 'broader':115 'call':45 'caller':103 'categori':122 'challeng':204 'classif':137 'commit':100 'confirm':196 'connect':243 'content':64 'contract':70 'convers':154 'cost':78 'crypto-paid endpoint' 'data':123,127,186 'decim':92 'detail':250 'doc':234 'document':175,226 'embed':138 'endpoint':30,119,157,194 'equal':85 'estim':148 'exact':185 'exchang':143 'export':128 'extrem':231 'feed':142 'financ':139 'four':121 'function':170 'gas':147 'gate':3,17 'generat':155 'generic':178 'geocod':152 'header':109,209 'host':47 'howev':167 'http':202 'infrastructur':150 'insight':129 'json':63 'json-response' 'key':95 'label':57,182 'learn':132 'limit':97 'list':159 'live':197 'lowpaymentfee' 'lowpaymentfee.com':32,116 'machin':131 'maximum':77,218 'metric':125 'network':51 'no-api-key' 'page':238 'part':34 'pay':9,23,43 'pay-per-cal':42 'pay-per-call API' 'pay-per-request' 'payment':65,108,211,221 'per':11,25,44,87 'platform':117 'point':166 'post':112 'post-method' 'premium':4,18,58,179 'premium API access' 'price':141,165,235 'prompt':245 'proper':201 'protocol':41 'quot':146 'rate':96,144 'readm':237 'recipi':212 'render':240 'report':126 'request':12,26,88,113 'requir':102 'resourc':54 'return':62,190,199 'second':225 'sentiment':133 'servic':188 'settl':67 'settlement':222 'simpli':104 'site':229 'specif':53,169 'suit':37 'summar':136 'technic':249 'text':135 'thin':232 'timeout':219 'token':145 'unclear':192 'unit':83 'upfront':99 'usdc':14,28,69,89 'usdc-settlement' 'use':90 'util':151 'valid':153 'version':207 'wallet':244 'web3':140 'x402':2,16,40,107,206 'x402 API' 'x402-gated':1,15 'x402-payment' 'x402-protocol':39","prices":[{"id":"34bc9847-5f12-444e-800b-a63b96e6ad18","listingId":"5900ad8d-ed54-4307-b2c4-82c017fae62a","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/38","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:44.661Z"}],"sources":[{"listingId":"5900ad8d-ed54-4307-b2c4-82c017fae62a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/benefits/38","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:44.661Z","lastSeenAt":"2026-04-22T07:01:48.435Z"}],"details":{"listingId":"5900ad8d-ed54-4307-b2c4-82c017fae62a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/benefits/38 \\\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 returns a 402 challenge with x402 version 1, accepting USDC on Base at maxAmountRequired 20000 (=$0.02)","source_url":"https://lowpaymentfee.com/api/v1/benefits/38"},{"claim":"All endpoints on the platform are priced at $0.02/request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/benefits/38"}],"useCases":["Accessing a premium API resource without needing API keys or subscriptions","Making one-off paid API calls settled instantly in USDC on Base","Integrating pay-per-request endpoints into agent workflows via x402 protocol"],"bestFor":["Developers who want zero-commitment, pay-as-you-go API access","AI agents that can autonomously pay for API calls via x402","Users already holding USDC on the Base network"],"notFor":["Users who need detailed documentation or well-defined response schemas before integrating","Anyone without a Base-compatible wallet or USDC holdings"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:26.013Z"},"updatedAt":"2026-04-22T07:01:48.435Z"}}