{"id":"1ebbcbd6-3a1b-40ed-a2ff-a4b6eddf390e","shortId":"vVqsnc","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":"This endpoint at lowpaymentfee.com provides premium API access to a customer resource (customer ID 81) via the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of 20,000 base units, which equals $0.02 per request (USDC uses 6 decimals).\n\nThe broader lowpaymentfee.com platform advertises a suite of endpoints spanning 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 $0.02 per request with no API keys, no rate limits, and no minimum commitments. However, the specific endpoint being listed here (/api/v1/customers/81) is not explicitly described among those categories on the landing page, so its exact data payload is unclear.\n\nThe x402 challenge was successfully captured (HTTP 402 with a well-formed accepts array), confirming the endpoint is live. Documentation pages (/docs, /pricing, /api, /README) all returned only a \"Connect wallet\" prompt with no substantive content, so there is no OpenAPI schema, request/response examples, or detailed documentation available for this endpoint.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-call-pricing","json-response","post-method","customer-data"],"categories":["data","api-infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","customer data endpoint","lowpaymentfee","premium API access"],"warnings":["No documentation available — /docs, /pricing, /api, and /README all return only a wallet-connect prompt with no content.","The specific endpoint /api/v1/customers/81 is not listed among the advertised APIs on the landing page; its data payload is unknown.","No OpenAPI schema or request/response examples are provided.","No input schema is documented; the POST body format is entirely unknown."],"endpointUrl":"https://lowpaymentfee.com/api/v1/customers/81","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/81","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 works and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and all documentation pages are empty stubs. The specific purpose of /api/v1/customers/81 is not described anywhere on the site, making this effectively a stub 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'/api/v1/customers/81':161 '/docs':202 '/pricing':203 '/readme':205 '/request':17,34 '0.02':16,33,85,140 '000':80 '0x8335':72 '20':79 '2913':73 '402':187 '6':90 '81':49 'Base network API' 'USDC micropayment API' 'accept':56,193 'access':42 'advertis':96 'ai':109 'among':166 'analysi':113 'analyt':103 'api':7,24,41,145 'array':194 'avail':228 'base':9,26,67,81 'base-network' 'broader':93 'call':4,21 'captur':185 'categori':168 'challeng':182 'classif':116 'commit':153 'confirm':195 'connect':210 'content':216 'contract':71 'convers':133 'cost':77 'custom':5,22,45,47 'customer data endpoint' 'customer-data' 'data':6,23,102,106,176 'decim':91 'describ':165 'detail':226 'document':200,227 'embed':117 'endpoint':36,100,136,157,197,231 'equal':84 'estim':127 'exact':175 'exampl':224 'exchang':122 'explicit':164 'export':107 'feed':121 'financ':118 'form':192 'gas':126 'generat':134 'geocod':131 'howev':154 'http':186 'id':48 'infrastructur':129 'insight':108 'json':61 'json-response' 'key':146 'land':171 'learn':111 'limit':149 'list':138,159 'live':199 'lowpaymentfee' 'lowpaymentfee.com':38,94 'machin':110 'maximum':76 'metric':104 'minimum':152 'network':68 'openapi':221 'page':172,201 'pay':2,19 'pay-per-cal':1,18 'pay-per-call API' 'payload':177 'payment':53,62 'per':3,20,86,141 'per-call-pricing' 'platform':95 'post':57 'post-method' 'premium':40 'premium API access' 'price':120 'prompt':212 'protocol':54 'provid':39 'quot':125 'rate':123,148 'report':105 'request':58,87,142 'request/response':223 'resourc':46 'return':60,207 'schema':222 'sentiment':112 'settl':12,29,64 'span':101 'specif':156 'substant':215 'success':184 'suit':98 'summar':115 'text':114 'token':124 'unclear':179 'unit':82 'usdc':14,31,70,88 'usdc-settlement' 'use':69,89 'util':130 'valid':132 'via':10,27,50 'wallet':211 'web3':119 'well':191 'well-form':190 'x402':11,28,52,181 'x402 API' 'x402-payment'","prices":[{"id":"55933311-d418-4042-9285-897ef910ee93","listingId":"1ebbcbd6-3a1b-40ed-a2ff-a4b6eddf390e","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/81","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:35:38.525Z"}],"sources":[{"listingId":"1ebbcbd6-3a1b-40ed-a2ff-a4b6eddf390e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/customers/81","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:35:38.525Z","lastSeenAt":"2026-04-29T16:08:26.197Z"}],"details":{"listingId":"1ebbcbd6-3a1b-40ed-a2ff-a4b6eddf390e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/customers/81 \\\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 maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/customers/81"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/customers/81"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) contain only a Connect wallet prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving customer data on a pay-per-call basis without API key management","Agent-driven data retrieval with automatic USDC micropayments on Base","Accessing premium resources with no subscription or rate-limit overhead"],"bestFor":["Developers wanting zero-commitment, pay-as-you-go API access","AI agents that can settle x402 payments autonomously on Base","Projects needing low-cost per-request data without signup"],"notFor":["Users who need detailed API documentation or OpenAPI schemas before integrating","High-volume use cases where a flat-rate subscription would be cheaper","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:50.141Z"},"updatedAt":"2026-04-29T16:08:26.197Z"}}