{"id":"66dc9750-2903-4a14-a2ad-41a7eff145f4","shortId":"4FQSsS","kind":"x402","title":"Download November 2025 backup data via x402 micropayment on Base for $0.02 per request.","tagline":"Download November 2025 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 November 2025 via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of pay-per-request APIs spanning data analytics, AI/ML inference, finance, and utility services — all gated behind x402 micropayments settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/backups/2025-11/download` accepts POST requests and returns `application/json` content. 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). No API keys are required; payment is handled entirely through the X-PAYMENT header. The platform advertises no rate limits and instant access.\n\nDocumentation on the site is extremely thin — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples. The endpoint is confirmed live (returns a proper 402 challenge), but the actual content and structure of the backup data are unknown.","tags":[],"capabilities":["x402-payment","usdc-base","backup-download","pay-per-request","no-api-key"],"categories":["storage","data"],"synonyms":["backup download","data export","November 2025 backup","x402 backup API","micropayment data download","Base USDC API"],"warnings":["No OpenAPI or schema documentation available — request body and response structure are unknown","All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no useful content","The nature and contents of the 'backup' data are entirely undescribed","No examples or sample responses are available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2025-11/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/2025-11/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 clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and the actual content of the backup data is completely undescribed. This is effectively a stub 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'0.02':12,26,121 '000':110 '0x8335':115 '20':109 '2025':3,17,42 '2913':116 '402':198 '6':126 'Base USDC API' 'November 2025 backup' 'accept':94 'access':34,151 'actual':202 'advertis':104,145 'ai/ml':72 'analyt':71 'api':68,129,161 'application/json':99 'backup':4,18,38,208 'backup download' 'backup-download' 'base':10,24,88,111,118 'behind':80 'challeng':103,199 'confirm':193 'connect':170 'content':100,176,203 'cost':107 'data':5,19,70,209 'data export' 'decim':127 'doc':160 'document':152,185 'download':1,15,37 'endpoint':30,53,92,191 'entir':136 'equal':120 'exampl':189 'extrem':157 'file':39 'financ':74 'gate':79 'handl':135 'header':142 'host':60 'infer':73 'instant':150 'key':130 'limit':148 'live':194 'lowpaymentfee.com':32,57 'mani':52 'maximum':106 'micropay':8,22,82 'micropayment data download' 'network':89 'no-api-key' 'novemb':2,16,41 'offer':54 'one':50 'openapi':180 'page':165 'pay':65 'pay-per-request':64 'payment':46,133,141 'per':13,27,66,122 'platform':58,144 'post':95 'price':162 'prompt':172 'proper':197 'protocol':47 'provid':33 'rate':147 'readm':164 'render':167 'request':14,28,67,96,123 'request/response':183 'requir':132 'return':98,195 'schema':184 'servic':77 'settl':83 'site':155 'span':69 'spec':181 'specif':91 'structur':205 'thin':158 'unit':112 'unknown':211 'usag':188 'usdc':85,114,124 'usdc-base' 'use':125 'util':76 'varieti':62 'via':6,20,43 'wallet':171 'x':140 'x-payment':139 'x402':7,21,45,81,102 'x402 backup API' 'x402-payment'","prices":[{"id":"e4e1e08b-d098-4e1d-adee-bc86564e1eff","listingId":"66dc9750-2903-4a14-a2ad-41a7eff145f4","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/2025-11/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":"2026-04-18T19:29:57.029Z"}],"sources":[{"listingId":"66dc9750-2903-4a14-a2ad-41a7eff145f4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2025-11/download","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:57.029Z","lastSeenAt":"2026-04-22T15:02:33.850Z"}],"details":{"listingId":"66dc9750-2903-4a14-a2ad-41a7eff145f4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2025-11/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","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-11/download"},{"claim":"The platform advertises $0.02 per request, no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-11/download"},{"claim":"Docs, API, pricing, and README pages show only 'Connect wallet'","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Downloading archived backup data for November 2025","Programmatic retrieval of periodic backup snapshots","Agent-driven data archival workflows using x402 micropayments"],"bestFor":["Agents or scripts that need to fetch backup data without API key management","Users who prefer pay-per-call pricing with no subscription","Workflows settling payments in USDC on the Base L2 network"],"notFor":["Users who need detailed documentation or schema guarantees before integrating","Bulk download scenarios where per-request pricing may add up","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.767Z"},"updatedAt":"2026-04-22T15:02:33.850Z"}}