{"id":"547ae918-a15a-4ed0-bad1-210244cf66fe","shortId":"7aZFfG","kind":"x402","title":"Download 2023-06 backup data via x402 micropayment on Base for $0.02 per request.","tagline":"Download 2023-06 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 from June 2023 via the x402 payment protocol. It is part of a broader platform offering data & analytics, AI/ML inference, finance/Web3, and infrastructure utility APIs — all gated behind per-request x402 micropayments settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/backups/2023-06/download` accepts POST requests and returns application/json content. Payment is required via the X-PAYMENT header using the x402 \"exact\" scheme. The maximum amount required is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 USD (USDC uses 6 decimals). The payment timeout is 300 seconds. No API keys or rate limits are advertised — access is purely pay-per-call.\n\nThe platform's landing page lists numerous other endpoints across categories like sentiment analysis, text summarization, geocoding, price feeds, and more, all at the same $0.02/request price point. Documentation pages beyond the landing page returned only a \"Connect wallet\" prompt with no additional technical detail, so the exact schema of the backup payload and what data it contains remain unclear.","tags":[],"capabilities":["x402-payment","usdc-base","backup-download","per-request-billing","no-api-key"],"categories":["storage","data"],"synonyms":["backup download","data export","file download","x402 api","micropayment api","base network api","usdc payment endpoint"],"warnings":["No documentation available — all doc pages return only 'Connect wallet' with no technical content","The exact contents and schema of the backup download response are unknown","No OpenAPI or machine-readable schema provided","The nature of the 'backup' data (what system, what format, what coverage) is completely unspecified"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2023-06/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/2023-06/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 (402 challenge captured) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation beyond a landing page, no example responses, and the purpose of the backup data is entirely unspecified. The docs, pricing, API, and README pages all returned only 'Connect wallet' with no useful 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'/api/v1/backups/2023-06/download':83 '/request':175 '0.02':12,26,122,174 '000':111 '0x8335':116 '20':110 '2023':2,16,42 '2913':117 '300':132 '6':126 'accept':84 'access':34,142 'across':158 'addit':192 'advertis':141 'ai/ml':58 'amount':107 'analysi':162 'analyt':57 'api':64,135 'application/json':89 'backup':4,18,38,201 'backup download' 'backup-download' 'base':10,24,78,112,119 'base network api' 'behind':67 'beyond':180 'broader':53 'call':148 'categori':159 'connect':187 'contain':207 'content':90 'data':5,19,56,205 'data export' 'decim':127 'detail':194 'document':178 'download':1,15,37 'endpoint':30,82,157 'equal':121 'exact':103,197 'feed':167 'file':39 'file download' 'finance/web3':60 'gate':66 'geocod':165 'header':99 'infer':59 'infrastructur':62 'june':41 'key':136 'land':152,182 'like':160 'limit':139 'list':154 'lowpaymentfee.com':32 'maximum':106 'micropay':8,22,72 'micropayment api' 'network':79 'no-api-key' 'numer':155 'offer':55 'page':153,179,183 'part':50 'pay':146 'pay-per-cal':145 'payload':202 'payment':46,91,98,129 'per':13,27,69,147 'per-request':68 'per-request-billing' 'platform':54,150 'point':177 'post':85 'price':166,176 'prompt':189 'protocol':47 'provid':33 'pure':144 'rate':138 'remain':208 'request':14,28,70,86 'requir':93,108 'return':88,184 'schema':198 'scheme':104 'second':133 'sentiment':161 'settl':73 'specif':81 'summar':164 'technic':193 'text':163 'timeout':130 'unclear':209 'unit':113 'usd':123 'usdc':75,115,124 'usdc payment endpoint' 'usdc-base' 'use':100,125 'util':63 'via':6,20,43,94 'wallet':188 'x':97 'x-payment':96 'x402':7,21,45,71,102 'x402 api' 'x402-payment'","prices":[{"id":"f9f189ae-8138-4565-8397-ba6b03a434c2","listingId":"547ae918-a15a-4ed0-bad1-210244cf66fe","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/2023-06/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":"2026-04-18T19:29:55.224Z"}],"sources":[{"listingId":"547ae918-a15a-4ed0-bad1-210244cf66fe","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2023-06/download","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:55.224Z","lastSeenAt":"2026-04-22T15:02:33.797Z"}],"details":{"listingId":"547ae918-a15a-4ed0-bad1-210244cf66fe","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2023-06/download \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":{"url":"https://lowpaymentfee.com/api/v1/backups/2023-06/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 requiring 20000 base units of USDC on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913)","source_url":"https://lowpaymentfee.com/api/v1/backups/2023-06/download"},{"claim":"All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Downloading archived backup data from June 2023 via a single micropayment","Programmatic retrieval of backup snapshots without subscription or API key management","Agent-driven data acquisition using x402 payment protocol on Base"],"bestFor":["Agents or scripts that need one-off backup data retrieval without account setup","Developers experimenting with x402 pay-per-call protocols on Base","Automated pipelines that need to fetch archived data with minimal friction"],"notFor":["Users needing real-time or frequently updated data (this is a static 2023-06 backup)","Scenarios requiring detailed documentation or guaranteed SLAs — docs are minimal","Bulk downloads where per-request pricing would be cost-inefficient"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.887Z"},"updatedAt":"2026-04-22T15:02:33.797Z"}}