{"id":"7902a159-6318-4e6f-b3a7-5ab86ad0b713","shortId":"W4Uw35","kind":"x402","title":"Download 2023-02 backup data via x402 micropayment on Base for $0.02 per request.","tagline":"Download 2023-02 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 February 2023 period. It is part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance, crypto, and utility services — all gated behind the x402 payment protocol on the Base network using USDC.\n\nThe specific endpoint `/api/v1/backups/2023-02/download` accepts POST requests and returns `application/json` responses. Payment is settled on-chain via USDC on Base (contract `0x8335…2913`) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). There are no API keys, no rate limits, and no subscription commitments — each call is individually paid for via the x402 `X-PAYMENT` header.\n\nThe platform's documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all returned only a \"Connect wallet\" prompt with no substantive content, so details about the backup file's schema, contents, or size are unknown. The endpoint is confirmed live (returns a proper 402 challenge), but the actual payload and use case for the backup data remain unclear.","tags":[],"capabilities":["x402-payment","usdc-base","backup-download","pay-per-request","no-api-key"],"categories":["storage","data"],"synonyms":["backup download","data export","archive download","file download API","x402 backup","Base USDC API","lowpaymentfee"],"warnings":["No documentation available — all doc pages (/docs, /pricing, /api, /README) returned only a wallet-connect prompt","The backup file contents, schema, and size are completely unknown","The endpoint name suggests static archival data (2023-02) whose utility may be limited or unclear"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2023-02/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/2023-02/download","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, but there is no documentation, no OpenAPI schema, no example responses, and no description of what the backup file actually contains. All doc pages returned only 'Connect wallet' with no useful 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'/api':156 '/api/v1/backups/2023-02/download':87 '/docs':154 '/pricing':155 '/readme':157 '0.02':12,26,119 '000':114 '0x8335':106 '20':113 '2023':2,16,43 '2913':107 '402':190 '6':122 'Base USDC API' 'accept':88 'access':34 'actual':194 'ai/ml':64 'amount':111 'analyt':63 'api':59,127 'application/json':93 'archive download' 'backup':4,18,38,173,201 'backup download' 'backup-download' 'base':10,24,80,104,115 'behind':73 'broader':50 'call':58,137 'case':198 'chain':100 'challeng':191 'commit':135 'confirm':185 'connect':162 'content':168,177 'contract':105 'crypto':67 'data':5,19,62,202 'data export' 'decim':123 'detail':170 'document':152 'download':1,15,37 'dozen':53 'endpoint':30,60,86,183 'equal':118 'februari':42 'file':39,174 'file download API' 'financ':66 'gate':72 'header':148 'individu':139 'infer':65 'key':128 'limit':131 'live':186 'lowpaymentfee' 'lowpaymentfee.com':32 'maximum':110 'micropay':8,22 'network':81 'no-api-key' 'offer':52 'on-chain':98 'page':153 'paid':140 'part':47 'pay':56 'pay-per-cal':55 'pay-per-request' 'payload':195 'payment':76,95,147 'per':13,27,57 'period':44 'platform':51,150 'post':89 'prompt':164 'proper':189 'protocol':77 'provid':33 'rate':130 'remain':203 'request':14,28,90 'respons':94 'return':92,159,187 'schema':176 'servic':70 'settl':97 'size':179 'span':61 'specif':85 'subscript':134 'substant':167 'unclear':204 'unit':116 'unknown':181 'usdc':83,102,120 'usdc-base' 'use':82,121,197 'util':69 'via':6,20,101,142 'wallet':163 'x':146 'x-payment':145 'x402':7,21,75,144 'x402 backup' 'x402-payment'","prices":[{"id":"663e88f8-abf5-43f7-8648-6ae63e7b1130","listingId":"7902a159-6318-4e6f-b3a7-5ab86ad0b713","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/2023-02/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":"2026-04-18T19:29:49.237Z"}],"sources":[{"listingId":"7902a159-6318-4e6f-b3a7-5ab86ad0b713","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2023-02/download","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:49.237Z","lastSeenAt":"2026-04-22T16:32:25.898Z"}],"details":{"listingId":"7902a159-6318-4e6f-b3a7-5ab86ad0b713","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2023-02/download \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":{"url":"https://lowpaymentfee.com/api/v1/backups/2023-02/download","method":"POST","headers":{"X-PAYMENT":"<x402-payment-token>","Content-Type":"application/json"}},"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 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/2023-02/download"},{"claim":"The platform advertises $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 on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/backups/2023-02/download"}],"useCases":["Downloading archived backup data from February 2023","Programmatic retrieval of historical data snapshots","Agent-driven data acquisition with per-call crypto payment"],"bestFor":["Agents needing on-demand access to historical backup files","Developers who want keyless, pay-per-use data downloads","Users comfortable with x402 USDC payments on Base"],"notFor":["Users who need detailed documentation or schema guarantees before purchasing","Bulk or streaming data access where per-request fees would accumulate quickly","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:28.212Z"},"updatedAt":"2026-04-22T16:32:25.898Z"}}