{"id":"b620b41a-d83e-4aa4-8dd3-8f67b31ab6eb","shortId":"Y9EeuA","kind":"x402","title":"x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.","tagline":"x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.","description":"This endpoint at `/api/v1/claims/95` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-request APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities. All endpoints are gated via the x402 payment protocol on the Base network, accepting USDC (contract 0x8335…2913) with no API keys, no rate limits, and no commitments required.\n\nThe specific `/api/v1/claims/95` endpoint is listed as \"Premium API Access\" but its exact functionality is not documented beyond that label. The x402 challenge confirms it is live, accepting POST requests, and requires a maximum payment of 20,000 base units of USDC (6 decimals), which equals $0.02 per request. The payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout.\n\nThe broader platform advertises endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02/request price point. However, documentation pages (docs, pricing, README) returned only a \"Connect wallet\" prompt with no further technical detail, so the exact request/response schema for this specific endpoint is unknown.","tags":[],"capabilities":["x402-payment","pay-per-request","usdc-settlement","base-network","json-api","post-method"],"categories":["api","infrastructure"],"synonyms":["premium API","x402 endpoint","pay-per-call API","USDC micropayment API","lowpaymentfee","Base network API","402 payment API"],"warnings":["The exact purpose and functionality of /api/v1/claims/95 ('Premium API Access') is not documented anywhere in the crawled material.","All documentation pages (/docs, /pricing, /README, /api) returned only 'Connect wallet' with no usable content.","No OpenAPI spec, request schema, or response schema is available.","The endpoint name 'claims/95' suggests a specific resource but its domain is unclear."],"endpointUrl":"https://lowpaymentfee.com/api/v1/claims/95","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/claims/95","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid x402 402 challenge with clear pricing ($0.02 USDC on Base). However, the specific functionality of /api/v1/claims/95 is undocumented, there is no OpenAPI schema, no request/response examples, and all documentation pages returned only 'Connect wallet' with no content. The listing is essentially a stub with verified liveness and 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'/request':17,34,194 '0.02':16,33,144,193 '000':135 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':153 '0x8335':85 '20':134 '2913':86 '300':156 '402 payment API' '6':140 'Base network API' 'USDC micropayment API' 'accept':82,125 'access':107 'address':152 'advertis':162 'ai':61 'analysi':171 'analyt':60 'api':5,22,57,89,106 'base':8,25,80,136 'base-network' 'beyond':115 'broader':160 'call':12,29 'challeng':120 'classif':174 'collect':48 'commit':96 'confirm':121 'connect':206 'contract':84 'convers':186 'data':59,167 'decim':141 'detail':213 'doc':200 'document':114,198 'embed':175 'endpoint':6,23,36,70,101,163,222 'equal':143 'estim':183 'exact':110,216 'exchang':178 'export':168 'feed':177 'financ':64 'function':111 'gas':182 'gate':3,20,72 'generat':188 'geocod':184 'howev':197 'infrastructur':67 'insight':169 'json-api' 'key':90 'label':117 'learn':63 'limit':93 'list':103 'live':124 'lowpaymentfee' 'lowpaymentfee.com':43 'machin':62 'maximum':131 'metric':165 'network':81 'offer':46 'page':199 'part':40 'pay':10,27,54 'pay-per-cal':9,26 'pay-per-call API' 'pay-per-request':53 'payment':76,132,148 'per':11,28,55,145 'platform':44,161 'point':196 'post':126 'post-method' 'premium':4,21,105 'premium API' 'price':176,195,201 'prompt':208 'protocol':52,77 'quot':181 'rate':92,179 'readm':202 'report':166 'request':56,127,146 'request/response':217 'requir':97,129 'return':203 'schema':218 'second':157 'sent':150 'sentiment':170 'span':58 'specif':99,221 'summar':173 'technic':212 'text':172 'timeout':158 'token':180 'unit':137 'unknown':224 'usdc':14,31,83,139 'usdc-settlement' 'util':68 'valid':185 'via':73 'wallet':207 'web3':65 'x402':2,19,51,75,119 'x402 endpoint' 'x402-gated':1,18 'x402-payment' 'x402-protocol':50","prices":[{"id":"a5ac48e8-647f-4509-a0d5-28284c211d9d","listingId":"b620b41a-d83e-4aa4-8dd3-8f67b31ab6eb","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/claims/95","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:45:57.365Z"}],"sources":[{"listingId":"b620b41a-d83e-4aa4-8dd3-8f67b31ab6eb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/claims/95","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:45:57.365Z","lastSeenAt":"2026-04-22T10:31:36.020Z"}],"details":{"listingId":"b620b41a-d83e-4aa4-8dd3-8f67b31ab6eb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/claims/95 \\\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 valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/claims/95"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/claims/95"},{"claim":"Platform pricing is $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":["Accessing gated premium data or services with per-request USDC micropayments","Agent-driven API consumption without API key management","Programmatic pay-as-you-go access to utility endpoints"],"bestFor":["Developers wanting zero-commitment, keyless API access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or OpenAPI specs before integrating","Applications requiring free or fiat-only payment methods","High-volume use cases where per-request pricing may add up without bulk discounts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:20.057Z"},"updatedAt":"2026-04-22T10:31:36.020Z"}}