{"id":"a4ffb5f9-3c37-4e6c-829f-765529220294","shortId":"xHtCR5","kind":"x402","title":"Pay-per-call customer data API on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call customer data API on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides access to a \"Premium API Access\" resource at the path `/api/v1/customers/25`. It is part of a broader platform offering dozens of pay-per-request APIs spanning data & analytics, AI/ML inference, finance & Web3 data, and infrastructure utilities — all settled via the x402 protocol on the Base network using USDC.\n\nThe specific endpoint `/api/v1/customers/25` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made inline via the X-PAYMENT header with no API keys, no rate limits, and no upfront commitments. The payment timeout is 300 seconds.\n\nDocumentation on the site is extremely thin — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawl. The endpoint name suggests it returns customer data for a given ID, but the exact fields and behavior are unverified. The platform lists many other endpoints at $0.02 each across categories like sentiment analysis, text summarization, geocoding, and crypto gas estimates, all using the same x402 payment model on Base.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-api","customer-data","no-api-key","post-method"],"categories":["data","api-infrastructure"],"synonyms":["customer API","premium data access","x402 API","pay-per-call API","Base USDC API","lowpaymentfee","micropayment API"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown","All documentation pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no content","The endpoint path /api/v1/customers/25 with a hardcoded ID may be a demo/placeholder rather than a production resource","No information on what customer data is returned or what POST body is expected"],"endpointUrl":"https://lowpaymentfee.com/api/v1/customers/25","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/25","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 402 challenge with clear pricing. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The purpose of the specific /customers/25 path is unclear — it could be a demo or placeholder. This is effectively a stub 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'/api/v1/customers/25':46,88 '/docs':157 '/pricing':158 '/readme':161 '/request':13,28 '0.02':12,27,115,218 '000':104 '0x8335':109 '20':103 '2913':110 '300':147 '6':120 'Base USDC API' 'accept':89 'access':36,41 'across':220 'addit':172 'advertis':98 'ai/ml':65 'analysi':224 'analyt':64 'api':7,22,40,61,134 'avail':187 'base':9,24,81,105,112,240 'behavior':208 'broader':52 'call':4,19 'categori':221 'challeng':97 'commit':142 'connect':167 'cost':101 'crawl':190 'crypto':229 'custom':5,20,197 'customer API' 'customer-data' 'data':6,21,63,69,198 'decim':121 'detail':174 'document':149 'dozen':55 'endpoint':32,87,192,216 'equal':114 'estim':231 'exact':205 'exampl':186 'extrem':154 'field':206 'financ':67 'gas':230 'geocod':227 'given':201 'header':131 'id':202 'infer':66 'infrastructur':71 'inlin':125 'json':94 'json-api' 'key':135 'like':222 'limit':138 'list':213 'lowpaymentfee' 'lowpaymentfee.com':34 'made':124 'mani':214 'maximum':100 'micropayment API' 'model':238 'name':193 'network':82 'no-api-key' 'offer':54 'openapi':178 'page':162 'part':49 'path':45 'pay':2,17,58 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':57 'payment':122,130,144,237 'per':3,18,59,116 'platform':53,212 'post':90 'post-method' 'premium':39 'premium data access' 'prompt':169 'protocol':78 'provid':35 'rate':137 'render':164 'request':60,91,117 'request/response':181 'resourc':42 'return':93,196 'schema':182 'second':148 'sentiment':223 'settl':74 'site':152 'span':62 'spec':179 'specif':86 'suggest':194 'summar':226 'technic':173 'text':225 'thin':155 'timeout':145 'unit':106 'unverifi':210 'upfront':141 'usag':185 'usdc':15,30,84,108,118 'usdc-base' 'use':83,119,233 'util':72 'via':10,25,75,126 'wallet':168 'web3':68 'x':129 'x-payment':128 'x402':11,26,77,96,236 'x402 API' 'x402-payment'","prices":[{"id":"ca9482df-06a6-41d7-acec-eb8d0777f11c","listingId":"a4ffb5f9-3c37-4e6c-829f-765529220294","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/25","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:37.879Z"}],"sources":[{"listingId":"a4ffb5f9-3c37-4e6c-829f-765529220294","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/customers/25","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:37.879Z","lastSeenAt":"2026-04-29T11:33:32.940Z"}],"details":{"listingId":"a4ffb5f9-3c37-4e6c-829f-765529220294","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/customers/25 \\\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 advertises maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/customers/25"},{"claim":"The platform lists APIs at $0.02/request across data, AI, finance, and infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"The platform advertises no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/customers/25"}],"useCases":["Retrieving customer records on a per-request payment basis without API key management","Integrating pay-as-you-go data access into agent workflows via x402","Accessing structured customer data from an x402-enabled endpoint on Base"],"bestFor":["Agents or services that need on-demand customer data without subscription overhead","Developers experimenting with x402 payment protocol integrations","Low-volume or bursty access patterns where per-call pricing is cost-effective"],"notFor":["High-volume bulk data retrieval where per-request fees would accumulate quickly","Use cases requiring detailed API documentation or guaranteed SLAs","Users without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:47.267Z"},"updatedAt":"2026-04-29T11:33:32.940Z"}}