{"id":"accdc367-8247-493a-9558-aa8d24bf5015","shortId":"9janU4","kind":"x402","title":"Pay-per-call customer data API on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call customer data API on Base via x402, settled in USDC at $0.02/request.","description":"lowpaymentfee.com hosts a collection of pay-per-request APIs accessible via the x402 payment protocol on the Base network. This specific endpoint (`/api/v1/customers/15`) is described by the provider as \"Premium API Access\" and returns JSON. Payment is settled in USDC (contract 0x8335…2913 on Base) using the x402 exact-payment scheme.\n\nThe x402 challenge captured from the endpoint confirms it is live, accepting POST requests with a maxAmountRequired of 20,000 base units. Since USDC uses 6 decimals, this translates to $0.02 per request — consistent with the site-wide pricing of $0.02/request advertised on the landing page. The provider advertises no API keys, no rate limits, and instant access.\n\nThe broader lowpaymentfee.com platform also offers endpoints for analytics/metrics, AI inference (sentiment, summarization, classification, embeddings), finance/crypto data, and utility services, all at the same $0.02 price point. However, this listing covers only the `/api/v1/customers/15` endpoint. Documentation pages (/docs, /pricing, /README) returned minimal content (just a \"Connect wallet\" prompt), so the request/response schema for this specific endpoint is unknown beyond the fact that it accepts POST and returns application/json.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","json-response","post-method","per-call-pricing","no-api-key"],"categories":["data","api-infrastructure"],"synonyms":["customer data API","premium API access","x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee"],"warnings":["No request or response schema available — the input/output format for /api/v1/customers/15 is undocumented.","Documentation pages (/docs, /pricing, /README) returned only 'Connect wallet' with no actual content.","The endpoint path '/api/v1/customers/15' with a hardcoded ID is unusual; it is unclear whether this is a demo resource or a real data endpoint.","The broader platform lists many endpoint categories (AI, finance, analytics) but none match this specific customers endpoint, raising questions about its purpose."],"endpointUrl":"https://lowpaymentfee.com/api/v1/customers/15","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/15","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing. However, there is no OpenAPI schema, no documentation of request/response payloads, and the docs/pricing/README pages are empty stubs. The purpose of the '/customers/15' resource is unclear beyond the generic 'Premium API Access' 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'/docs':185 '/pricing':186 '/readme':187 '/request':17,34,130 '0.02':16,33,118,129,172 '000':107 '0x8335':77 '20':106 '2913':78 '6':113 'Base network API' 'USDC micropayment API' 'accept':99,211 'access':45,67,147 'advertis':131,138 'ai':157 'also':152 'analytics/metrics':156 'api':7,24,44,66,140 'application/json':215 'base':9,26,53,80,108 'base-network' 'beyond':206 'broader':149 'call':4,21 'captur':91 'challeng':90 'classif':161 'collect':38 'confirm':95 'connect':193 'consist':121 'content':190 'contract':76 'cover':178 'custom':5,22 'customer data API' 'data':6,23,164 'decim':114 'describ':60 'document':183 'embed':162 'endpoint':57,94,154,182,203 'exact':85 'exact-pay':84 'fact':208 'finance/crypto':163 'host':36 'howev':175 'infer':158 'instant':146 'json':70 'json-response' 'key':141 'land':134 'limit':144 'list':177 'live':98 'lowpaymentfee' 'lowpaymentfee.com':35,150 'maxamountrequir':104 'minim':189 'network':54 'no-api-key' 'offer':153 'page':135,184 'pay':2,19,41 'pay-per-cal':1,18 'pay-per-call API' 'pay-per-request':40 'payment':49,71,86 'per':3,20,42,119 'per-call-pricing' 'platform':151 'point':174 'post':100,212 'post-method' 'premium':65 'premium API access' 'price':127,173 'prompt':195 'protocol':50 'provid':63,137 'rate':143 'request':43,101,120 'request/response':198 'return':69,188,214 'schema':199 'scheme':87 'sentiment':159 'servic':167 'settl':12,29,73 'sinc':110 'site':125 'site-wid':124 'specif':56,202 'summar':160 'translat':116 'unit':109 'unknown':205 'usdc':14,31,75,111 'usdc-settlement' 'use':81,112 'util':166 'via':10,27,46 'wallet':194 'wide':126 'x402':11,28,48,83,89 'x402 API' 'x402-payment'","prices":[{"id":"694406ac-fb38-4d6e-97c2-037bd7d920f4","listingId":"accdc367-8247-493a-9558-aa8d24bf5015","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/15","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:48.206Z"}],"sources":[{"listingId":"accdc367-8247-493a-9558-aa8d24bf5015","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/customers/15","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:48.206Z","lastSeenAt":"2026-04-29T15:04:29.049Z"}],"details":{"listingId":"accdc367-8247-493a-9558-aa8d24bf5015","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/customers/15 \\\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/customers/15"},{"claim":"Site-wide pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/customers/15"}],"useCases":["Retrieving customer record data on a per-call payment basis without needing an API key","Agent-driven workflows that need to fetch structured customer information and pay per request","Demonstrating x402 payment protocol integration for data access"],"bestFor":["Developers experimenting with x402 pay-per-call patterns","AI agents that need keyless, on-demand data access settled in USDC","Low-volume or sporadic API consumers who prefer no subscriptions"],"notFor":["High-volume bulk data retrieval where per-call costs add up","Use cases requiring detailed API documentation or guaranteed SLAs","Users without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:49.687Z"},"updatedAt":"2026-04-29T15:04:29.049Z"}}