{"id":"04d9de01-6429-4b98-9ad6-14b250209192","shortId":"JWT65T","kind":"x402","title":"Download December 2025 backup data via x402 micropayment on Base (USDC).","tagline":"Download December 2025 backup data via x402 micropayment on Base (USDC).","description":"This endpoint at lowpaymentfee.com provides access to a downloadable backup file for December 2025. It is part of a broader platform that offers a variety of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all gated behind the x402 payment protocol on the Base network using USDC.\n\nThe specific endpoint `/api/v1/backups/2025-12/download` accepts POST requests and returns a JSON response upon successful payment. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 \"exact\" scheme to the specified payTo address, with a timeout of 300 seconds. No API keys or rate limits are advertised; access is instant once payment is included in the X-PAYMENT header.\n\nDocumentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional content. There is no OpenAPI spec, no request/response schema beyond the x402 outputSchema stub, and no description of what the backup file actually contains. The endpoint is live (returns a proper 402 challenge), but the lack of documentation makes it difficult to know what data is included in the backup or what format the response takes.","tags":[],"capabilities":["x402-payment","usdc-on-base","backup-download","pay-per-request","no-api-key"],"categories":["storage","data"],"synonyms":["backup download","data export","x402 backup","USDC micropayment API","lowpaymentfee","Base network API","pay-per-call backup"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or request/response schema provided","Unknown backup contents — no description of what data the December 2025 backup includes","No example responses available to verify output format"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2025-12/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/2025-12/download","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 402 challenge, confirming it is operational. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no description of what the backup actually contains. The listing is effectively a stub with only the x402 challenge metadata to work 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'0.02':112 '000':101 '0x8335':106 '20':100 '2025':3,14,36 '2913':107 '300':136 '402':214 '6':117 'Base network API' 'USDC micropayment API' 'accept':81 'access':28,146 'actual':205 'addit':182 'address':131 'advertis':95,145 'ai/ml':57 'analyt':56 'api':53,139,168 'backup':4,15,32,203,232 'backup download' 'backup-download' 'base':10,21,73,102,109 'behind':66 'beyond':192 'broader':42 'challeng':94,215 'connect':177 'contain':206 'content':183 'cost':98 'data':5,16,55,60,227 'data export' 'decemb':2,13,35 'decim':118 'descript':199 'difficult':223 'doc':167 'document':159,220 'download':1,12,31 'endpoint':24,79,208 'equal':111 'exact':125 'extrem':164 'file':33,204 'finance/web3':59 'format':235 'gate':65 'header':158 'includ':152,229 'infer':58 'infrastructur':62 'instant':148 'json':87 'key':140 'know':225 'lack':218 'limit':143 'live':210 'lowpaymentfee' 'lowpaymentfee.com':26 'made':121 'make':221 'maximum':97 'micropay':8,19 'network':74 'no-api-key' 'offer':45 'openapi':187 'outputschema':195 'page':172 'part':39 'pay':50 'pay-per-call backup' 'pay-per-request':49 'payment':69,91,119,150,157 'payto':130 'per':51,113 'platform':43 'post':82 'price':169 'prompt':179 'proper':213 'protocol':70 'provid':27 'rate':142 'readm':171 'render':174 'request':52,83,114 'request/response':190 'respons':88,237 'return':85,211 'schema':191 'scheme':126 'second':137 'site':162 'span':54 'spars':165 'spec':188 'specif':78 'specifi':129 'stub':196 'success':90 'take':238 'timeout':134 'unit':103 'upon':89 'usdc':11,22,76,105,115 'usdc-on-base' 'use':75,116 'util':63 'varieti':47 'via':6,17,122 'wallet':178 'x':156 'x-payment':155 'x402':7,18,68,93,124,194 'x402 backup' 'x402-payment'","prices":[{"id":"18c51fda-9bfe-4c0a-a62d-b029322c4848","listingId":"04d9de01-6429-4b98-9ad6-14b250209192","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/2025-12/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":"2026-04-18T19:59:19.167Z"}],"sources":[{"listingId":"04d9de01-6429-4b98-9ad6-14b250209192","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2025-12/download","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:19.167Z","lastSeenAt":"2026-04-22T11:32:36.322Z"}],"details":{"listingId":"04d9de01-6429-4b98-9ad6-14b250209192","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2025-12/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 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-12/download"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-12/download"}],"useCases":["Downloading monthly backup archives for December 2025","Programmatic retrieval of backup data without API key management","Agent-driven data acquisition using x402 micropayments"],"bestFor":["Users who need a specific December 2025 backup file","Agents that can settle x402 payments in USDC on Base","Scenarios requiring keyless, pay-per-use data downloads"],"notFor":["Users who need detailed documentation or schema before purchasing","Bulk or streaming data access (single-file download per call)","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.26Z"},"updatedAt":"2026-04-22T11:32:36.322Z"}}