{"id":"1cac5aad-b817-4f5e-80dd-cfb7df18be26","shortId":"LK7wPs","kind":"x402","title":"x402-gated backup/data endpoint on Base, pay-per-request with USDC at $0.02/call.","tagline":"x402-gated backup/data endpoint on Base, pay-per-request with USDC at $0.02/call.","description":"This endpoint at lowpaymentfee.com provides a \"Premium API Access\" resource at the path `/api/v1/backups/2026-06`. It is part of a broader platform offering dozens of x402-gated 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/2026-06` path suggests a backup or data-export resource scoped to June 2026. The x402 challenge confirms the endpoint is live, accepting POST requests, and requiring 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 sent to address 0x1A2B…85F3 with a 300-second timeout. No API keys or rate limits are advertised; access is purely payment-gated.\n\nDocumentation is extremely thin — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the backup resource actually contains or what POST body it expects. The platform's landing page lists many endpoints but provides no technical detail beyond names and prices. Treat this as a stub listing until richer documentation becomes available.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","data-backup","json-response","no-api-key"],"categories":["storage","data"],"synonyms":["backup API","data export","x402 endpoint","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee"],"warnings":["No OpenAPI schema or request/response examples available","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no content","The purpose and contents of /api/v1/backups/2026-06 are unclear — 'Premium API Access' is generic","No information on what POST body the endpoint expects"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2026-06","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/2026-06","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 challenge with clear pricing, but there is zero documentation on request format, response schema, or what the backup resource actually contains. Docs pages are empty. This is effectively a 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'/call':16,32 '0.02':15,31,75,130 '000':119 '0x1a2b':141 '0x8335':124 '20':118 '2026':100 '2913':125 '300':145 '6':134 '85f3':142 'Base network API' 'USDC micropayment API' 'accept':109 'access':41,156 'actual':200 'address':140 'advertis':155 'ai/ml':65 'analyt':64 'api':40,60,149,169 'avail':235 'backup':91,198 'backup API' 'backup/data':4,20 'base':7,23,83,120,127 'base-network' 'becom':234 'beyond':221 'bodi':205 'broader':52 'challeng':103 'confirm':104 'connect':177 'contain':201 'content':183 'data':63,68,94 'data export' 'data-backup' 'data-export':93 'decim':135 'descript':194 'detail':220 'doc':167 'document':162,233 'dozen':55 'endpoint':5,21,34,61,106,215 'equal':129 'exact':115 'exampl':191 'expect':207 'export':95 'extrem':164 'finance/web3':67 'gate':3,19,59,161 'given':131 'infer':66 'infrastructur':70 'json-response' 'june':99 'key':150 'land':211 'limit':153 'list':213,230 'live':108 'lowpaymentfee' 'lowpaymentfee.com':36 'mani':214 'name':222 'network':84 'no-api-key' 'offer':54 'openapi':187 'page':172,212 'part':49 'path':45,88 'pay':9,25 'pay-per-call API' 'pay-per-request':8,24 'payment':116,136,160 'payment-g':159 'per':10,26,76 'platform':53,209 'post':110,204 'premium':39 'price':73,168,224 'prompt':179 'provid':37,217 'pure':158 'rate':152 'readm':171 'render':174 'request':11,27,77,111 'request/response':190 'requir':113 'resourc':42,96,199 'richer':232 'schema':188 'scope':97 'second':146 'sent':138 'settl':78 'span':62 'specif':86 'stub':229 'substant':182 'suggest':89 'technic':219 'thin':165 'timeout':147 'treat':225 'unit':121 'usdc':13,29,80,123,132 'usdc-settlement' 'util':71 'wallet':178 'x402':2,18,58,102 'x402 endpoint' 'x402-gated':1,17,57 'x402-payment'","prices":[{"id":"6fa06492-c82d-4ffb-a86e-6088136dadca","listingId":"1cac5aad-b817-4f5e-80dd-cfb7df18be26","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/2026-06","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:16.744Z"}],"sources":[{"listingId":"1cac5aad-b817-4f5e-80dd-cfb7df18be26","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2026-06","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:16.744Z","lastSeenAt":"2026-04-22T13:32:03.191Z"}],"details":{"listingId":"1cac5aad-b817-4f5e-80dd-cfb7df18be26","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2026-06 \\\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":"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/2026-06"},{"claim":"All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/backups/2026-06"}],"useCases":["Retrieving backup data for a specific monthly period via a single paid request","Programmatic data export without managing API keys or subscriptions","Agent-driven data retrieval with on-chain USDC micropayments"],"bestFor":["Developers wanting key-less, pay-per-use data access","AI agents that can settle x402 payments on Base","Users who prefer crypto micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or schema validation before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.384Z"},"updatedAt":"2026-04-22T13:32:03.191Z"}}