{"id":"5ecbb3af-cf8e-4f10-9fa0-8db54066d526","shortId":"NR33g2","kind":"x402","title":"x402-gated premium API access on Base, paying per-request in USDC.","tagline":"x402-gated premium API access on Base, paying per-request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" behind an x402 payment wall. The specific resource `/api/v1/customers/37` appears to be a customer data endpoint, though the site offers a broad suite of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated via the x402 protocol on the Base network.\n\nThe x402 challenge confirms the endpoint is live and accepts payment via the \"exact\" scheme on Base, settling in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The maximum amount required is 20,000 units (which at 6 USDC decimals equals $0.02 per request), consistent with the site's advertised flat pricing of $0.02/request across all endpoints. The endpoint accepts POST requests and returns `application/json`.\n\nThe site advertises no API keys, no rate limits, and instant access. Documentation pages (`/docs`, `/pricing`, `/README`) returned only a \"Connect wallet\" prompt with no substantive content, so the actual request/response schemas for this specific endpoint are unknown. The endpoint path suggests it retrieves or operates on a specific customer record (ID 37), but without documentation or example payloads, the exact functionality remains unclear.","tags":[],"capabilities":["x402-payment-gated","usdc-base-settlement","per-request-pricing","json-response","post-method","no-api-key-required"],"categories":["data","api-gateway"],"synonyms":["x402 API","pay-per-request API","USDC gated endpoint","Base network API","lowpaymentfee","customer data API","micropayment API"],"warnings":["No documentation available — /docs, /pricing, and /README pages all return only a 'Connect wallet' prompt with no content.","The specific purpose of /api/v1/customers/37 is unclear; the path suggests customer data but no schema or description is provided.","No request body schema or response schema documented anywhere.","The endpoint path references a hardcoded customer ID (37), which may be a demo or placeholder resource."],"endpointUrl":"https://lowpaymentfee.com/api/v1/customers/37","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/customers/37","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and well-formed, confirming the endpoint exists and accepts USDC on Base at $0.02/request. However, there is no documentation, no request/response schema, and no explanation of what the /api/v1/customers/37 endpoint actually returns. The docs, pricing, and README pages are all blank beyond a wallet connect 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'/docs':158 '/pricing':159 '/readme':160 '/request':132 '0.02':119,131 '000':111 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':104 '20':110 '37':196 '6':115 'Base network API' 'USDC gated endpoint' 'accept':92,138 'access':6,20,36,155 'across':133 'actual':173 'advertis':127,146 'ai':65 'amount':107 'analyt':64 'api':5,19,35,61,148 'appear':46 'application/json':143 'base':8,22,81,99 'behind':37 'broad':58 'challeng':85 'confirm':86 'connect':164 'consist':122 'content':170 'contract':103 'custom':50,193 'customer data API' 'data':51,63 'decim':117 'document':156,199 'endpoint':30,52,88,135,137,179,183 'equal':118 'exact':96,204 'exampl':201 'financ':68 'flat':128 'function':205 'gate':3,17,74 'id':195 'infrastructur':71 'instant':154 'json-response' 'key':149 'learn':67 'limit':152 'live':90 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':66 'maximum':106 'micropayment API' 'network':82 'no-api-key-required' 'offer':56 'oper':189 'page':157 'path':184 'pay':9,23 'pay-per-request API' 'payload':202 'payment':40,93 'per':11,25,120 'per-request':10,24 'per-request-pricing' 'post':139 'post-method' 'premium':4,18,34 'price':129 'prompt':166 'protocol':78 'provid':33 'rate':151 'record':194 'remain':206 'request':12,26,121,140 'request/response':174 'requir':108 'resourc':44 'retriev':187 'return':142,161 'schema':175 'scheme':97 'settl':100 'site':55,125,145 'span':62 'specif':43,178,192 'substant':169 'suggest':185 'suit':59 'though':53 'unclear':207 'unit':112 'unknown':181 'usdc':14,28,102,116 'usdc-base-settlement' 'util':72 'via':75,94 'wall':41 'wallet':165 'web3':69 'without':198 'x402':2,16,39,77,84 'x402 API' 'x402-gated':1,15 'x402-payment-gated'","prices":[{"id":"fccb08a5-54ec-4c79-a32d-1898c60d2e2a","listingId":"5ecbb3af-cf8e-4f10-9fa0-8db54066d526","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/customers/37","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:32:18.348Z"}],"sources":[{"listingId":"5ecbb3af-cf8e-4f10-9fa0-8db54066d526","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/customers/37","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:32:18.348Z","lastSeenAt":"2026-04-24T13:31:32.340Z"}],"details":{"listingId":"5ecbb3af-cf8e-4f10-9fa0-8db54066d526","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/customers/37 \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -H \"Content-Type: application/json\"","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 x402Version 1, exact scheme, on Base network, with maxAmountRequired of 20000 in USDC","source_url":"https://lowpaymentfee.com/api/v1/customers/37"},{"claim":"The site advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/customers/37"},{"claim":"Documentation pages (/docs, /pricing, /README) contain only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Accessing customer data records behind a per-call micropayment wall","Programmatic agent-driven data retrieval with no subscription or API key","On-chain USDC-settled API consumption on Base L2"],"bestFor":["Agents that need keyless, pay-per-call API access","Developers exploring x402 protocol integrations","Use cases requiring low-friction, no-commitment API access"],"notFor":["High-volume use cases where $0.02/request adds up significantly","Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:15:00.045Z"},"updatedAt":"2026-04-24T13:31:32.340Z"}}