{"id":"9941dcdc-b32e-4dfb-99bd-9f2ab93608d1","shortId":"k97bNK","kind":"x402","title":"Download backup data for Feb 2026 via x402 micropayment on Base network.","tagline":"Download backup data for Feb 2026 via x402 micropayment on Base network.","description":"This endpoint at lowpaymentfee.com provides access to a downloadable backup file for the period 2026-02, gated behind an x402 payment challenge. The endpoint accepts POST requests and returns application/json content. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of $0.02 per request (20,000 base units at 6 decimals).\n\nThe broader lowpaymentfee.com platform advertises a suite of pay-per-call APIs spanning data analytics, AI/ML inference (sentiment, summarization, classification, embeddings), finance/crypto data feeds, and utility services — all priced at $0.02 per request with no API keys, no rate limits, and no commitments. However, this specific endpoint is scoped to backup downloads rather than the analytics or AI categories. Documentation pages (docs, pricing, README) returned only a wallet-connect prompt with no substantive content, so the exact schema of the backup payload and what data it contains remain unclear.","tags":[],"capabilities":["x402-payment","base-network","usdc-settlement","backup-download","pay-per-request","no-api-key"],"categories":["storage","data"],"synonyms":["backup download API","data export","file download endpoint","x402 backup","lowpaymentfee backup","paid data download","Base USDC API"],"warnings":["Documentation pages (/docs, /pricing, /README) returned no useful content — only a wallet-connect prompt.","No OpenAPI or schema available; the structure of the backup data returned is unknown.","The backup period '2026-02' is in the future relative to typical current dates — unclear if this is placeholder or forward-dated data.","The generic 'Premium API Access' title/description provides no specifics about what the backup contains."],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2026-02/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/2026-02/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 (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no documentation of the backup payload structure, and all doc pages returned only a wallet-connect stub. The endpoint's purpose (\"backups/2026-02/download\") is narrow and 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'0.02':73,114 '000':77 '0x8335':66 '20':76 '2026':6,18,39 '2913':67 '6':81 'Base USDC API' 'accept':49 'access':30 'advertis':87 'ai':141 'ai/ml':99 'analyt':98,139 'api':95,119 'application/json':54 'backup':2,14,34,134,165 'backup download API' 'backup-download' 'base':11,23,61,78 'base-network' 'behind':42 'broader':84 'call':94 'categori':142 'challeng':46 'classif':103 'commit':126 'connect':153 'contain':171 'content':55,158 'contract':65 'cost':71 'data':3,15,97,106,169 'data export' 'decim':82 'doc':145 'document':143 'download':1,13,33,135 'embed':104 'endpoint':26,48,130 'exact':161 'feb':5,17 'feed':107 'file':35 'file download endpoint' 'finance/crypto':105 'gate':41 'howev':127 'infer':100 'key':120 'limit':123 'lowpaymentfee backup' 'lowpaymentfee.com':28,85 'maximum':70 'micropay':9,21 'network':12,24,62 'no-api-key' 'page':144 'paid data download' 'pay':92 'pay-per-cal':91 'pay-per-request' 'payload':166 'payment':45,56 'per':74,93,115 'period':38 'platform':86 'post':50 'price':112,146 'prompt':154 'provid':29 'rate':122 'rather':136 'readm':147 'remain':172 'request':51,75,116 'return':53,148 'schema':162 'scope':132 'sentiment':101 'servic':110 'settl':58 'span':96 'specif':129 'substant':157 'suit':89 'summar':102 'unclear':173 'unit':79 'usdc':64 'usdc-settlement' 'use':63 'util':109 'via':7,19 'wallet':152 'wallet-connect':151 'x402':8,20,44 'x402 backup' 'x402-payment'","prices":[{"id":"db748202-1c3d-493a-9ae0-2572861d2560","listingId":"9941dcdc-b32e-4dfb-99bd-9f2ab93608d1","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/2026-02/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":"2026-04-18T19:59:12.507Z"}],"sources":[{"listingId":"9941dcdc-b32e-4dfb-99bd-9f2ab93608d1","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2026-02/download","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:12.507Z","lastSeenAt":"2026-04-22T13:32:03.004Z"}],"details":{"listingId":"9941dcdc-b32e-4dfb-99bd-9f2ab93608d1","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2026-02/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 requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/backups/2026-02/download"},{"claim":"maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02","source_url":"https://lowpaymentfee.com/api/v1/backups/2026-02/download"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, 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/2026-02/download"}],"useCases":["Downloading periodic backup data files for archival or recovery","Programmatic retrieval of February 2026 backup snapshots","Agent-initiated paid data downloads without API key registration"],"bestFor":["Agents needing on-demand backup retrieval with crypto micropayments","Workflows requiring no-signup, pay-per-use data downloads","Automated systems that settle payments on Base L2 with USDC"],"notFor":["Users who need detailed documentation or schema guarantees before purchasing","Streaming or real-time data access (this is a single-file download)","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.626Z"},"updatedAt":"2026-04-22T13:32:03.004Z"}}