{"id":"9753a8c5-c1ca-42ef-96d6-5234d5234e18","shortId":"pKKZwF","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":"lowpaymentfee.com hosts a collection of pay-per-request APIs accessible via the x402 payment protocol on the Base network. The specific endpoint `/api/v1/customers/10` is described as \"Premium API Access\" and returns JSON. 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 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 are listed at the same $0.02/request price point.\n\nDocumentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material. The specific behavior of the `/api/v1/customers/10` endpoint (what customer data it returns, what POST body it expects) is unknown from the available sources.","tags":[],"capabilities":["x402-payment","per-request-pricing","usdc-settlement","base-network","json-response","customer-data","no-api-key","no-rate-limits"],"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 OpenAPI or schema documentation available — request body and response format are unknown","All documentation pages (/docs, /pricing, /api, /README) return only a 'Connect wallet' prompt with no content","The specific purpose and data returned by /api/v1/customers/10 is not documented anywhere in the crawled material","Cannot verify what 'Premium API Access' actually provides beyond the generic label"],"endpointUrl":"https://lowpaymentfee.com/api/v1/customers/10","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/10","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and the purpose of the /customers/10 endpoint is undocumented. Effectively a stub 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'/api/v1/customers/10':54,209 '/docs':169 '/pricing':170 '/readme':173 '/request':13,28,161 '0.02':12,27,85,160 '000':80 '0x8335':70 '20':79 '2913':71 '6':90 'Base network API' 'USDC micropayment API' 'access':41,60 'across':118 'advertis':116 'ai':128 'analysi':132 'analyt':122 'api':7,22,40,59,93 'attach':104 'avail':199,225 'base':9,24,49,73,81 'base-network' 'behavior':206 'bodi':218 'broader':113 'call':4,19 'caller':102 'categori':120 'classif':135 'collect':34 'commit':99 'connect':179 'content':185 'contract':69 'convers':152 'cost':77 'crawl':202 'custom':5,20,212 'customer data endpoint' 'customer-data' 'data':6,21,121,125,213 'decim':91 'describ':56 'document':164,194 'embed':136 'endpoint':53,117,210 'equal':84 'estim':146 'exampl':198 'exchang':141 'expect':220 'export':126 'extrem':166 'feed':140 'financ':137 'four':119 'gas':145 'generat':153 'geocod':150 'header':108 'host':32 'infrastructur':148 'insight':127 'json':63 'json-response' 'key':94 'learn':130 'limit':96 'list':156 'lowpaymentfee' 'lowpaymentfee.com':31,114 'machin':129 'materi':203 'maximum':76 'metric':123 'network':50 'no-api-key' 'no-rate-limits' 'openapi':189 'page':174 'pay':2,17,37 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request':36 'payment':45,64,107 'per':3,18,38,86 'per-request-pricing' 'platform':115 'point':163 'post':217 'premium':58 'premium API access' 'price':139,162 'prompt':181 'protocol':46 'quot':144 'rate':95,142 'render':176 'report':124 'request':39,87,111 'request/response':192 'requir':101 'return':62,215 'schema':193 'sentiment':131 'settl':66 'simpli':103 'sourc':226 'spars':167 'spec':190 'specif':52,205 'summar':134 'text':133 'token':143 'unit':82 'unknown':222 'upfront':98 'usag':197 'usdc':15,30,68,88 'usdc-settlement' 'use':89 'util':149 'valid':151 'via':10,25,42 'wallet':180 'web3':138 'x402':11,26,44,106 'x402 API' 'x402-payment'","prices":[{"id":"d45d481f-0b3d-49be-ae45-4ba4381b146f","listingId":"9753a8c5-c1ca-42ef-96d6-5234d5234e18","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/10","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:36:13.066Z"}],"sources":[{"listingId":"9753a8c5-c1ca-42ef-96d6-5234d5234e18","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/customers/10","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:36:13.066Z","lastSeenAt":"2026-04-29T13:33:58.846Z"}],"details":{"listingId":"9753a8c5-c1ca-42ef-96d6-5234d5234e18","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/customers/10 \\\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 requesting 20,000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/customers/10"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/customers/10"},{"claim":"All listed APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access","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"}],"useCases":["Retrieving customer data records on a pay-per-call basis without subscription commitments","Agent-driven workflows that need on-demand data access settled in USDC on Base","Prototyping integrations where per-request billing avoids upfront API key provisioning"],"bestFor":["Developers or agents wanting zero-commitment, per-call API access","x402-compatible clients on the Base network","Use cases requiring small, infrequent data lookups without subscription overhead"],"notFor":["High-volume bulk data retrieval where per-call pricing becomes expensive","Users who need detailed API documentation or guaranteed SLAs","Callers without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:48.476Z"},"updatedAt":"2026-04-29T13:33:58.846Z"}}