{"id":"6fbd6473-11ab-44cc-a3ab-5ed4bd9f757c","shortId":"9pjQBT","kind":"x402","title":"Download June 2025 backup data via x402 micropayment on Base network for $0.02 per request.","tagline":"Download June 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 June 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 specific endpoint `/api/v1/backups/2025-06/download` accepts POST requests and returns application/json content. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The x402 challenge confirms the endpoint is live and discoverable.\n\nThe nature of the \"backup\" data being served is not documented beyond the endpoint path and the generic \"Premium API Access\" description. No OpenAPI schema, request body specification, or response format details are available. The broader site's documentation pages returned only a \"Connect wallet\" prompt with no substantive content.","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 API","lowpaymentfee"],"warnings":["No documentation available—docs, pricing, and README pages all return only a wallet-connect prompt","The content of the 'backup' is entirely undocumented; unclear what data is actually served","No request body schema or response schema provided","Purpose of endpoint is ambiguous—could be placeholder or test content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2025-06/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/2025-06/download","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge, but there is no documentation on what the backup contains, no request/response schema, and the docs pages are empty. The purpose of this specific endpoint is unclear beyond its URL 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'0.02':13,28,76,120 '000':116 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':109 '20':115 '2025':3,18,44 '6':124 'Base USDC API' 'accept':92 'access':36,156 'ai/ml':67 'amount':113 'analyt':66 'api':63,81,155 'application/json':97 'avail':169 'backup':4,19,40,140 'backup download' 'backup-retrieval' 'base':10,25,104,117 'base-network' 'beyond':147 'bodi':162 'broader':55,171 'call':78 'challeng':128 'confirm':129 'connect':179 'content':98,185 'contract':108 'data':5,20,65,141 'data export' 'decim':125 'descript':157 'detail':167 'discover':135 'document':146,174 'download':1,16,39 'endpoint':32,90,131,149 'file':41 'file retrieval' 'file-download' 'financ':69 'format':166 'generic':153 'given':121 'i.e':119 'infer':68 'june':2,17,43 'key':82 'limit':84 'live':133 'lowpaymentfee' 'lowpaymentfee.com':34 'maximum':112 'micropay':8,23 'micropayment endpoint' 'natur':137 'network':11,26,105 'offer':57 'openapi':159 'page':175 'part':52 'path':150 'pay':60 'pay-per-request':59 'payment':48,99 'per':14,29,61,77 'platform':56 'post':93 'premium':154 'price':74 'prompt':181 'protocol':49 'provid':35 'rate':83 'request':15,30,62,94,161 'requir':87 'respons':165 'return':96,176 'schema':160 'serv':143 'servic':72 'settl':101 'site':172 'span':64 'specif':89,163 'subscript':86 'substant':184 'unit':118 'usdc':107,122 'usdc-settlement' 'use':106 'util':71 'various':58 'via':6,21,45 'wallet':180 'x402':7,22,47,127 'x402 API' 'x402-payment'","prices":[{"id":"dc32c4c8-6746-4452-ab92-8dc8024b7644","listingId":"6fbd6473-11ab-44cc-a3ab-5ed4bd9f757c","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/2025-06/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":"2026-04-18T19:59:14.326Z"}],"sources":[{"listingId":"6fbd6473-11ab-44cc-a3ab-5ed4bd9f757c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2025-06/download","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:14.326Z","lastSeenAt":"2026-04-22T13:32:03.042Z"}],"details":{"listingId":"6fbd6473-11ab-44cc-a3ab-5ed4bd9f757c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2025-06/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 on POST, confirming it is live","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-06/download"},{"claim":"Platform advertises $0.02 per request pricing with no API keys or rate limits","source_url":"https://lowpaymentfee.com"},{"claim":"Payment uses USDC on Base network with maxAmountRequired of 20000 base units ($0.02)","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-06/download"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-06/download"}],"useCases":["Downloading periodic backup snapshots programmatically","Automated retrieval of archived data for June 2025","Agent-driven data acquisition with per-request crypto payment"],"bestFor":["Agents needing on-demand backup file access without API keys","Developers wanting pay-per-use data downloads on Base","Workflows requiring no-subscription data retrieval"],"notFor":["Users needing detailed documentation or schema guarantees before calling","High-volume bulk downloads where per-request pricing adds up","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.513Z"},"updatedAt":"2026-04-22T13:32:03.042Z"}}