{"id":"480cbb3d-90d9-4363-bb81-4d21c3710bf2","shortId":"GRavFS","kind":"x402","title":"x402-gated backup/data endpoint on Base, pay-per-call with USDC at $0.02 per request.","tagline":"x402-gated backup/data endpoint on Base, pay-per-call with USDC at $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific resource `/api/v1/backups/16` is one of many endpoints offered by the provider, which hosts a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated behind x402 micropayments settled in USDC on the Base network.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. The maximum amount required per call is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 USD (USDC uses 6 decimals). Payment is made via the `exact` scheme to the specified payTo address, with a 300-second timeout window. No API keys or rate limits are advertised; access is purely pay-per-request.\n\nThe specific functionality behind `/api/v1/backups/16` is not documented beyond the label \"Premium API Access.\" The provider's landing page lists this endpoint's category implicitly under infrastructure/utility services, but no schema, request parameters, or response format are documented for this particular route. The docs, pricing, and API pages all render only a \"Connect wallet\" prompt with no further technical detail. Prospective callers should be aware that the actual payload and response structure are unknown — treat this as a stub listing until the provider publishes documentation.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","micropayment","backup-api","post-endpoint"],"categories":["storage","infrastructure"],"synonyms":["backup API","premium API access","x402 endpoint","USDC micropayment API","Base network API","pay-per-call API","lowpaymentfee"],"warnings":["No documentation exists for the /api/v1/backups/16 endpoint — request and response schemas are unknown.","All doc pages (docs, pricing, API, README) render only 'Connect wallet' with no technical content.","The purpose of 'backups/16' is unclear; 'Premium API Access' is a generic label applied across the provider's catalog.","No OpenAPI spec, no ai-plugin manifest, and no agents.txt were found."],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/16","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/16","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation of request parameters, response schema, or what 'backups/16' actually returns. The docs/pricing/API pages are all blank beyond a wallet-connect prompt. This is effectively a stub 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'0.02':15,32,120 '000':109 '0x8335':114 '20':108 '2913':115 '300':140 '6':124 'Base network API' 'USDC micropayment API' 'accept':98 'access':42,152,172 'actual':226 'address':137 'advertis':151 'ai':69 'amount':103 'analyt':68 'api':41,145,171,205 'awar':223 'backup API' 'backup-api' 'backup/data':4,21 'base':7,24,87,110,117 'behind':79,162 'beyond':167 'broad':64 'call':11,28,106 'caller':220 'catalog':65 'categori':182 'challeng':91 'confirm':92 'connect':211 'data':67 'decim':125 'detail':218 'doc':202 'document':166,196,243 'endpoint':5,22,36,56,94,180 'equal':119 'exact':131 'financ':72 'format':194 'function':161 'gate':3,20,78 'host':62 'implicit':183 'infrastructur':75 'infrastructure/utility':185 'key':146 'label':169 'land':176 'learn':71 'limit':149 'list':178,238 'live':96 'lowpaymentfee' 'lowpaymentfee.com':38 'machin':70 'made':128 'mani':55 'maximum':102 'micropay':81 'micropayment' 'network':88 'offer':57 'one':53 'page':177,206 'paramet':191 'particular':199 'pay':9,26,156 'pay-per-cal':8,25 'pay-per-call API' 'pay-per-request':155 'payload':227 'payment':46,126 'payto':136 'per':10,16,27,33,105,157 'post':99 'post-endpoint' 'premium':40,170 'premium API access' 'price':203 'prompt':213 'prospect':219 'protocol':47 'provid':39,60,174,241 'publish':242 'pure':154 'rate':148 'render':208 'request':17,34,100,158,190 'requir':104 'resourc':50 'respons':193,229 'rout':200 'schema':189 'scheme':132 'second':141 'servic':186 'settl':82 'span':66 'specif':49,160 'specifi':135 'structur':230 'stub':237 'technic':217 'timeout':142 'treat':233 'unit':111 'unknown':232 'usd':121 'usdc':13,30,84,113,122 'usdc-base' 'use':123 'util':76 'via':43,129 'wallet':212 'web3':73 'window':143 'x402':2,19,45,80,90 'x402 endpoint' 'x402-gated':1,18 'x402-payment'","prices":[{"id":"0085c4e3-98f6-46e5-88e5-881f6198c169","listingId":"480cbb3d-90d9-4363-bb81-4d21c3710bf2","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/16","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:46.922Z"}],"sources":[{"listingId":"480cbb3d-90d9-4363-bb81-4d21c3710bf2","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/16","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:46.922Z","lastSeenAt":"2026-04-22T18:04:41.521Z"}],"details":{"listingId":"480cbb3d-90d9-4363-bb81-4d21c3710bf2","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/16 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The x402 challenge returns maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/backups/16"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/backups/16"},{"claim":"Provider advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Provider offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Accessing backup data via a single paid API call without needing an API key","Programmatic pay-per-request data retrieval settled in USDC on Base","Agent-driven workflows that need on-demand backup or data export endpoints"],"bestFor":["Developers who want keyless, pay-per-call API access","AI agents with USDC on Base looking for low-cost utility endpoints","Prototyping x402 payment flows against a live endpoint"],"notFor":["Users who need detailed API documentation or guaranteed SLAs before integrating","High-volume batch operations where per-request pricing may add up","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:28.276Z"},"updatedAt":"2026-04-22T18:04:41.521Z"}}