{"id":"e09b2d41-e067-4b57-870d-ef2ed55f7c55","shortId":"T3GJjM","kind":"x402","title":"Download 2023-05 backup data via x402 micropayment on Base for $0.02 per request.","tagline":"Download 2023-05 backup data via x402 micropayment on Base for $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides access to a downloadable backup file for the 2023-05 period. It is part of a broader platform offering data & analytics, AI/ML inference, finance/Web3, and infrastructure utility APIs, all gated behind x402 micropayments on the Base network using USDC.\n\nThe specific endpoint `/api/v1/backups/2023-05/download` accepts POST requests and returns an `application/json` response. Payment is settled on-chain via the x402 \"exact\" scheme on Base, paying to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. The payment timeout is 300 seconds.\n\nThe platform advertises a flat $0.02/request pricing across all its endpoints, with no API keys, no rate limits, and instant access. Documentation pages beyond the landing page were largely empty (showing only a \"Connect wallet\" prompt), so details about the backup contents, schema of the returned JSON, or any query parameters are unknown. The endpoint is confirmed live via a valid 402 challenge response.","tags":[],"capabilities":["x402-payment","usdc-base","backup-download","micropayment","post-method"],"categories":["storage","data"],"synonyms":["backup download","data export","archive download","2023 backup","file download API","x402 data access"],"warnings":["No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no content.","The contents and schema of the backup download response are completely unknown.","No OpenAPI or schema definition is provided for this endpoint.","The endpoint path suggests a static historical backup (2023-05); it may not be regularly updated."],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2023-05/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/2023-05/download","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 with a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation of request/response formats, no examples, and the docs/pricing/API pages are all empty beyond a wallet-connect prompt. The purpose of the backup file and its contents are entirely 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'/api/v1/backups/2023-05/download':76 '/request':136 '0.02':12,26,121,135 '000':112 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':101 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':105 '20':111 '2023':2,16,42 '2023 backup' '300':128 '402':192 '6':117 'accept':77 'access':34,151 'across':138 'address':100 'advertis':132 'ai/ml':55 'amount':108 'analyt':54 'api':61,144 'application/json':83 'archive download' 'backup':4,18,38,171 'backup download' 'backup-download' 'base':10,24,69,97,113 'behind':64 'beyond':154 'broader':50 'chain':90 'challeng':193 'confirm':187 'connect':164 'content':172 'contract':104 'data':5,19,53 'data export' 'decim':118 'detail':168 'document':152 'download':1,15,37 'empti':160 'endpoint':30,75,141,185 'equal':120 'exact':94 'file':39 'file download API' 'finance/web3':57 'flat':134 'gate':63 'infer':56 'infrastructur':59 'instant':150 'json':177 'key':145 'land':156 'larg':159 'limit':148 'live':188 'lowpaymentfee.com':32 'maximum':107 'micropay':8,22,66 'micropayment' 'network':70 'offer':52 'on-chain':88 'page':153,157 'paramet':181 'part':47 'pay':98 'payment':85,125 'per':13,27,122 'period':44 'platform':51,131 'post':78 'post-method' 'price':137 'prompt':166 'provid':33 'queri':180 'rate':147 'request':14,28,79,123 'requir':109 'respons':84,194 'return':81,176 'schema':173 'scheme':95 'second':129 'settl':87 'show':161 'specif':74 'timeout':126 'unit':114 'unknown':183 'usdc':72,103,116 'usdc-base' 'use':71,102 'util':60 'valid':191 'via':6,20,91,189 'wallet':165 'x402':7,21,65,93 'x402 data access' 'x402-payment'","prices":[{"id":"f5a99064-776b-4dbc-b613-c81dcac16cdb","listingId":"e09b2d41-e067-4b57-870d-ef2ed55f7c55","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/2023-05/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":"2026-04-18T19:29:56.418Z"}],"sources":[{"listingId":"e09b2d41-e067-4b57-870d-ef2ed55f7c55","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2023-05/download","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:56.418Z","lastSeenAt":"2026-04-22T15:02:33.823Z"}],"details":{"listingId":"e09b2d41-e067-4b57-870d-ef2ed55f7c55","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2023-05/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":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/backups/2023-05/download"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/2023-05/download"}],"useCases":["Downloading archived backup data from May 2023","Programmatic retrieval of historical data snapshots","Agent-driven data acquisition with per-request micropayments"],"bestFor":["Agents needing on-demand access to archived backup files","Developers who want keyless, pay-per-use data downloads","Workflows requiring Base-network USDC micropayments for data access"],"notFor":["Users needing real-time or streaming data (this is a static backup)","Anyone without a Base-network USDC wallet","Bulk download scenarios where per-request pricing may add up"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.773Z"},"updatedAt":"2026-04-22T15:02:33.823Z"}}