{"id":"c94a8efc-8baf-4d78-b95b-1e7244c1fe5c","shortId":"TQuyRm","kind":"x402","title":"x402-gated backup/data endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated backup/data endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides a \"Premium API Access\" resource at the path `/api/v1/backups/2025-01`. It is part of a broader platform offering dozens of x402-payable API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.\n\nThe specific `/api/v1/backups/2025-01` path suggests a backup or archived data resource for January 2025, though the provider does not document what payload this endpoint returns. The x402 challenge is live and well-formed: it requires an exact payment of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals → $0.02) via the x402 protocol (version 1). Payment is sent to `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout. The response MIME type is `application/json`.\n\nThe platform advertises no API keys, no rate limits, and instant access. However, documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all resolve to a minimal \"Connect wallet\" prompt with no further content, so there is no schema documentation, example payloads, or detailed descriptions of what any endpoint actually returns. The backup endpoint in particular is not listed on the homepage's API catalog, making its purpose unclear.","tags":[],"capabilities":["x402-payment","usdc-base","per-request-billing","json-response","backup-data"],"categories":["storage","data"],"synonyms":["backup API","data export","archived data","January 2025 backup","x402 paid endpoint","USDC micropayment API","lowpaymentfee"],"warnings":["No documentation exists for this specific endpoint — its purpose and response format are unknown","All doc pages (/docs, /pricing, /api, /README) return only a 'Connect wallet' stub with no content","The /api/v1/backups/2025-01 path is not listed in the provider's homepage API catalog","No request or response schema is available; integration requires blind experimentation"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2025-01","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/2025-01","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and well-formed, confirming the endpoint works. However, there is zero documentation on what this backup endpoint accepts or returns — no OpenAPI spec, no examples, no description beyond the generic title. The docs/pricing/README pages are all empty 'Connect wallet' stubs. The specific endpoint isn't even listed in the homepage 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'/api/v1/backups/2025-01':40,81 '/docs':169 '/pricing':170 '/readme':172 '0.02':9,22,69,131 '000':120 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':142 '0x8335':125 '1':137 '20':119 '2025':92 '2913':126 '300':145 '6':129 'January 2025 backup' 'USDC micropayment API' 'access':35,165 'actual':200 'advertis':156 'ai/ml':59 'analyt':58 'api':34,54,158,214 'application/json':153 'archiv':87 'archived data' 'backup':85,203 'backup API' 'backup-data' 'backup/data':4,17 'base':7,20,77,121,128 'broader':46 'catalog':215 'challeng':106 'connect':178 'content':184 'data':57,62,88 'data export' 'decim':130 'descript':195 'detail':194 'document':98,167,190 'dozen':49 'endpoint':5,18,28,55,102,199,204 'exact':116 'exampl':191 'finance/web3':61 'form':112 'gate':3,16 'homepag':212 'howev':166 'infer':60 'infrastructur':64 'instant':164 'januari':91 'json-response' 'key':159 'limit':162 'list':209 'live':108 'lowpaymentfee' 'lowpaymentfee.com':30 'make':216 'mime':150 'minim':177 'network':78 'offer':48 'page':168 'part':43 'particular':206 'path':39,82 'pay':8,21 'payabl':53 'payload':100,192 'payment':117,138 'per':10,23,70 'per-request-billing' 'platform':47,155 'premium':33 'price':67 'prompt':180 'protocol':135 'provid':31,95 'purpos':218 'rate':161 'request':11,24,71 'requir':114 'resolv':174 'resourc':36,89 'respons':149 'return':103,201 'schema':189 'second':146 'sent':140 'settl':72 'span':56 'specif':80 'suggest':83 'though':93 'timeout':147 'type':151 'unclear':219 'unit':122 'usdc':13,26,74,124 'usdc-base' 'util':65 'version':136 'via':132 'wallet':179 'well':111 'well-form':110 'x402':2,15,52,105,134 'x402 paid endpoint' 'x402-gated':1,14 'x402-payable':51 'x402-payment'","prices":[{"id":"16ec2a68-7e42-4583-b09e-3baa85958ae6","listingId":"c94a8efc-8baf-4d78-b95b-1e7244c1fe5c","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/2025-01","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:20.938Z"}],"sources":[{"listingId":"c94a8efc-8baf-4d78-b95b-1e7244c1fe5c","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2025-01","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:20.938Z","lastSeenAt":"2026-04-22T11:32:36.369Z"}],"details":{"listingId":"c94a8efc-8baf-4d78-b95b-1e7244c1fe5c","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2025-01 \\\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 x402 challenge requires 20,000 base units of USDC on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equating to $0.02","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-01"},{"claim":"The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (/docs, /pricing, /api, /README) all resolve to a minimal 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving archived or backup data for January 2025 from the provider","Programmatic access to stored data snapshots via pay-per-request","Agent-driven data retrieval with no API key required"],"bestFor":["Agents that need keyless, pay-per-call access to backup data","Workflows requiring on-chain USDC micropayments on Base","Quick one-shot data retrieval without subscription commitments"],"notFor":["Users who need documented response schemas before integrating","High-volume bulk data retrieval where $0.02/request adds up","Anyone needing non-crypto payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.259Z"},"updatedAt":"2026-04-22T11:32:36.369Z"}}