{"id":"32004f36-18b8-4173-81db-88db51a033aa","shortId":"YHSVKV","kind":"x402","title":"Download September 2025 backup data via x402 micropayment on Base network for $0.02 per request.","tagline":"Download September 2025 backup data via x402 micropayment on Base network for $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides access to a downloadable backup file for September 2025 via the x402 payment protocol. It is part of a broader platform offering various pay-per-request APIs spanning data analytics, AI/ML inference, finance, and utility services — all priced at $0.02 per call with no API keys, rate limits, or subscriptions required.\n\nThe endpoint accepts POST requests and returns application/json content. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The maximum amount required per request is 20,000 base units of USDC (6 decimals), which equals $0.02. The x402 challenge is live and functioning correctly, with a 300-second payment timeout window.\n\nThe specific nature of the \"backup\" data being served is not documented beyond the URL path indicating a 2025-09 date range. No OpenAPI schema, detailed documentation, or example responses are available for this particular endpoint. The platform's docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further technical detail.","tags":[],"capabilities":["x402-payment","base-network","usdc-settlement","file-download","backup-retrieval","pay-per-request"],"categories":["storage","data"],"synonyms":["backup download","data export","file retrieval","x402 API","micropayment endpoint","Base USDC payment","pay-per-call API"],"warnings":["No documentation available — all doc pages render only 'Connect wallet' with no technical detail","The nature of the 'backup' data is undocumented; unclear what is actually returned","No OpenAPI or output schema beyond mimeType: application/json","Platform appears to be a generic x402 demo or placeholder with many listed endpoints but no substantive docs"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2025-09/download","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/backups/2025-09/download","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 pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no example request/response, and the purpose of the backup data is entirely opaque. The docs pages render only wallet-connect prompts with no technical 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'0.02':13,28,76,125 '000':116 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':107 '20':115 '2025':3,18,44,159 '300':136 '6':121 'Base USDC payment' 'accept':90 'access':36 'ai/ml':67 'amount':110 'analyt':66 'api':63,81,183 'application/json':95 'avail':172 'backup':4,19,40,146 'backup download' 'backup-retrieval' 'base':10,25,102,117 'base-network' 'beyond':153 'broader':55 'call':78 'challeng':128 'connect':189 'content':96 'contract':106 'correct':133 'data':5,20,65,147 'data export' 'date':161 'decim':122 'detail':166,196 'doc':180 'document':152,167 'download':1,16,39 'endpoint':32,89,176 'equal':124 'exampl':169 'file':41 'file retrieval' 'file-download' 'financ':69 'function':132 'indic':157 'infer':68 'key':82 'limit':84 'live':130 'lowpaymentfee.com':34 'maximum':109 'micropay':8,23 'micropayment endpoint' 'natur':143 'network':11,26,103 'offer':57 'openapi':164 'page':184 'part':52 'particular':175 'path':156 'pay':60 'pay-per-call API' 'pay-per-request':59 'payment':48,97,138 'per':14,29,61,77,112 'platform':56,178 'post':91 'price':74,181 'prompt':191 'protocol':49 'provid':35 'rang':162 'rate':83 'render':186 'request':15,30,62,92,113 'requir':87,111 'respons':170 'return':94 'schema':165 'second':137 'septemb':2,17,43 'serv':149 'servic':72 'settl':99 'span':64 'specif':142 'subscript':86 'technic':195 'timeout':139 'unit':118 'url':155 'usdc':105,120 'usdc-settlement' 'use':104 'util':71 'various':58 'via':6,21,45 'wallet':190 'window':140 'x402':7,22,47,127 'x402 API' 'x402-payment'","prices":[{"id":"48a377ae-e8fa-4287-9e56-3d25eb0b5409","listingId":"32004f36-18b8-4173-81db-88db51a033aa","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/backups/2025-09/download","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:20.938Z"}],"sources":[{"listingId":"32004f36-18b8-4173-81db-88db51a033aa","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2025-09/download","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:20.938Z","lastSeenAt":"2026-04-22T11:32:36.389Z"}],"details":{"listingId":"32004f36-18b8-4173-81db-88db51a033aa","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2025-09/download \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns 402 with x402 challenge advertising USDC on Base network, maxAmountRequired 20000 (=$0.02)","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-09/download"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-09/download"}],"useCases":["Downloading archived backup data for September 2025","Programmatic retrieval of periodic data snapshots","Agent-driven data acquisition with instant crypto payment"],"bestFor":["Agents needing on-demand backup file access without API keys","Workflows requiring pay-per-use data downloads on Base network","Automated systems that settle payments in USDC"],"notFor":["Users who need detailed documentation or schema validation before calling","Bulk download scenarios where per-request pricing is inefficient","Users without Base network USDC wallets"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.258Z"},"updatedAt":"2026-04-22T11:32:36.389Z"}}