{"id":"2bbadee2-ce69-4510-b540-d406ed22a842","shortId":"5kdvpT","kind":"x402","title":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","tagline":"Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific resource `/api/v1/customers/29` appears to be one entry point in a broader platform that offers multiple API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. All endpoints on the platform are priced at $0.02 per request, payable in USDC on the Base network with no API keys, rate limits, or commitments required.\n\nThe x402 challenge confirms the endpoint is live, accepting POST requests and settling payments in USDC (contract `0x8335...2913` on Base). The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per call. Payment is made via the `exact` scheme with a 300-second timeout. The response MIME type is `application/json`.\n\nWhile the platform advertises a wide range of APIs (sentiment analysis, text summarization, embeddings, price feeds, geocoding, etc.), this specific endpoint (`/api/v1/customers/29`) is labeled generically as \"Premium API Access\" and its exact functionality is unclear — it may return customer data or serve as a demo/test resource. Documentation pages (`/docs`, `/pricing`, `/README`) all returned minimal content (just \"Connect wallet\"), so there is no detailed schema or usage documentation available.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","json-response","no-api-key","post-method"],"categories":["data","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["Documentation pages (/docs, /pricing, /README) contain no useful content — only 'Connect wallet' text","The specific functionality of /api/v1/customers/29 is undocumented; 'Premium API Access' is a generic label","No OpenAPI spec or request/response schema available","No example responses to verify what data this endpoint actually returns"],"endpointUrl":"https://lowpaymentfee.com/api/v1/customers/29","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/29","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 ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation (all doc pages return only 'Connect wallet'), no example request/response, and the specific purpose of `/api/v1/customers/29` is unclear. This is effectively a stub 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'/docs':206 '/pricing':207 '/readme':208 '/request':13,28 '0.02':12,27,82,137 '000':128 '0x8335':118 '20':127 '2913':119 '300':149 '6':133 'Base network API' 'USDC micropayment API' 'accept':109 'access':7,22,38,186 'advertis':161 'ai':66 'amount':124 'analysi':168 'analyt':65 'api':6,21,37,61,94,166,185 'appear':48 'application/json':157 'avail':225 'base':9,24,90,121,129 'broader':56 'call':4,19,139 'categori':62 'challeng':103 'commit':99 'confirm':104 'connect':214 'content':212 'contract':117 'crypto-paid API' 'custom':196 'data':64,197 'decim':134 'demo/test':202 'detail':220 'document':204,224 'embed':171 'endpoint':32,75,106,178 'entri':52 'equal':136 'etc':175 'exact':145,189 'feed':173 'financ':69 'function':190 'generic':182 'geocod':174 'includ':63 'infrastructur':72 'json-response' 'key':95 'label':181 'learn':68 'limit':97 'live':108 'lowpaymentfee' 'lowpaymentfee.com':34 'machin':67 'made':142 'maximum':123 'may':194 'mime':154 'minim':211 'multipl':60 'network':91 'no-api-key' 'offer':59 'one':51 'page':205 'pay':2,17 'pay-per-cal':1,16 'pay-per-call API' 'pay-per-request' 'payabl':85 'payment':42,114,140 'per':3,18,83,138 'platform':57,78,160 'point':53 'post':110 'post-method' 'premium':5,20,36,184 'premium API access' 'price':80,172 'protocol':43 'provid':35 'rang':164 'rate':96 'request':84,111 'requir':100,125 'resourc':46,203 'respons':153 'return':195,210 'schema':221 'scheme':146 'second':150 'sentiment':167 'serv':199 'settl':113 'specif':45,177 'summar':170 'text':169 'timeout':151 'type':155 'unclear':192 'unit':130 'usag':223 'usdc':15,30,87,116,132 'usdc-base-network' 'util':73 'via':10,25,39,143 'wallet':215 'web3':70 'wide':163 'x402':11,26,41,102 'x402 API' 'x402-payment'","prices":[{"id":"f95edacb-4b39-436a-aa21-d5d63abc8042","listingId":"2bbadee2-ce69-4510-b540-d406ed22a842","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/29","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:37:22.785Z"}],"sources":[{"listingId":"2bbadee2-ce69-4510-b540-d406ed22a842","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/customers/29","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:37:22.785Z","lastSeenAt":"2026-04-28T17:34:18.795Z"}],"details":{"listingId":"2bbadee2-ce69-4510-b540-d406ed22a842","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/customers/29 \\\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":"All endpoints priced at $0.02 per request with no API keys, rate limits, or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers Data & Analytics, AI & ML, Finance & Web3, and Infrastructure API categories","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/customers/29"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/customers/29"}],"useCases":["Accessing premium data or customer records with per-call USDC micropayments","Integrating pay-as-you-go API calls into agent workflows without API key management","Testing x402 payment protocol integrations on Base network"],"bestFor":["Developers wanting zero-commitment, pay-per-use API access","AI agents that can settle x402 payments autonomously on Base","Projects needing low-friction API access without signup or rate limits"],"notFor":["Users who need detailed API documentation or OpenAPI schemas before integrating","High-volume use cases where per-request pricing may add up compared to subscription models","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:45.109Z"},"updatedAt":"2026-04-28T17:34:18.795Z"}}