{"id":"8723960c-7b2f-45c3-9a1e-4cb5c5bd005e","shortId":"rN7YPy","kind":"x402","title":"x402-gated backup/data endpoint on Base, paying $0.02 per request in USDC.","tagline":"x402-gated backup/data endpoint on Base, paying $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides a \"Premium API Access\" resource at the path `/api/v1/backups/2026-09`. 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/2026-09` path suggests a backup or archived dataset for September 2026. The x402 challenge confirms the endpoint is live, accepting POST requests, and requires an exact payment of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.\n\nThe platform advertises no API keys, no rate limits, and instant access. However, documentation pages (docs, pricing, README) all returned only a \"Connect wallet\" prompt with no substantive content, so the actual data format, request parameters, and response schema for this specific endpoint are unknown. The endpoint's purpose — whether it returns a backup file, a dataset snapshot, or something else — cannot be confirmed from available material alone.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","post-endpoint","backup-data","pay-per-request"],"categories":["storage","data"],"synonyms":["backup API","data export","archived data","premium data access","x402 backup endpoint","lowpaymentfee","USDC API payment"],"warnings":["No documentation available — all doc/pricing/README pages return only 'Connect wallet' with no content.","The specific purpose and response format of /api/v1/backups/2026-09 is unknown; 'backups/2026-09' could be a placeholder or test path.","No request body schema or response schema provided.","The date '2026-09' in the path is in the future, which is unusual for a backup endpoint."],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2026-09","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/2026-09","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation (all doc pages return only 'Connect wallet'), no request/response examples, and the purpose of the specific /backups/2026-09 path is unclear. This is effectively a stub 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'0.02':9,22,69,121 '000':110 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':132 '0x8335':115 '20':109 '2026':91 '2913':116 '300':135 '6':125 'USDC API payment' 'accept':100 'access':35,149 'actual':169 'address':131 'advertis':140 'ai/ml':59 'alon':205 'analyt':58 'api':34,54,142 'archiv':87 'archived data' 'avail':203 'backup':85,191 'backup API' 'backup-data' 'backup/data':4,17 'base':7,20,77,111,118 'base-network' 'broader':46 'cannot':199 'challeng':94 'confirm':95,201 'connect':160 'content':166 'data':57,62,170 'data export' 'dataset':88,194 'decim':126 'doc':153 'document':151 'dozen':49 'els':198 'endpoint':5,18,28,55,97,180,184 'equal':120 'exact':106 'file':192 'finance/web3':61 'format':171 'gate':3,16 'given':122 'howev':150 'infer':60 'infrastructur':64 'instant':148 'key':143 'limit':146 'live':99 'lowpaymentfee' 'lowpaymentfee.com':30 'made':129 'materi':204 'network':78 'offer':48 'page':152 'paramet':173 'part':43 'path':39,82 'pay':8,21 'pay-per-request' 'payabl':53 'payment':107,127 'per':10,23,70 'platform':47,139 'post':101 'post-endpoint' 'premium':33 'premium data access' 'price':67,154 'prompt':162 'provid':31 'purpos':186 'rate':145 'readm':155 'request':11,24,71,102,172 'requir':104 'resourc':36 'respons':175 'return':157,189 'schema':176 'second':136 'septemb':90 'settl':72 'snapshot':195 'someth':197 'span':56 'specif':80,179 'substant':165 'suggest':83 'timeout':137 'unit':112 'unknown':182 'usdc':13,26,74,114,123 'usdc-settlement' 'util':65 'wallet':161 'whether':187 'x402':2,15,52,93 'x402 backup endpoint' 'x402-gated':1,14 'x402-payable':51 'x402-payment'","prices":[{"id":"da72fe87-6956-4296-89ae-39a5fb7c6064","listingId":"8723960c-7b2f-45c3-9a1e-4cb5c5bd005e","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/2026-09","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:26.877Z"}],"sources":[{"listingId":"8723960c-7b2f-45c3-9a1e-4cb5c5bd005e","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2026-09","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:26.877Z","lastSeenAt":"2026-04-22T10:02:39.221Z"}],"details":{"listingId":"8723960c-7b2f-45c3-9a1e-4cb5c5bd005e","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2026-09 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","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 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/2026-09"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/backups/2026-09"}],"useCases":["Retrieving archived or backup data for a specific time period (2026-09)","Programmatic access to stored datasets via pay-per-call x402 protocol","Agent-driven data retrieval without API key management"],"bestFor":["Agents needing keyless, pay-per-use data retrieval on Base","Accessing backup or snapshot data without subscription commitments","Automated workflows that settle micropayments in USDC"],"notFor":["Users who need detailed API documentation before purchasing","High-volume bulk data retrieval where per-request pricing adds up","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:26.886Z"},"updatedAt":"2026-04-22T10:02:39.221Z"}}