{"id":"18c49b54-d738-4c27-8701-93fa53f3a5eb","shortId":"6XBqSJ","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 \"Premium API Access\" via the x402 payment protocol. The specific resource `/api/v1/backups/46` 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 on the Base network.\n\nThe endpoint accepts POST requests and returns application/json responses. Payment is settled in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base) using the \"exact\" x402 scheme. The maximum amount required per call is 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals). The provider advertises a flat $0.02 per request across all endpoints, with no API keys, no rate limits, and no minimum commitments.\n\nThe specific purpose of the `/api/v1/backups/46` resource is not documented beyond the generic label \"Premium API Access.\" The provider's landing page lists many endpoint categories but does not include a backups category, so the exact data returned by this particular endpoint is unclear. No OpenAPI schema, detailed documentation, or example responses were found in the crawl — the docs, pricing, and API pages all rendered only a \"Connect wallet\" prompt with no further content.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","json-response","post-method","no-api-key","micropayment"],"categories":["storage","data"],"synonyms":["backup API","data backup endpoint","x402 backup","lowpaymentfee backup","premium API access","paid backup download","Base USDC API"],"warnings":["The exact purpose and response format of /api/v1/backups/46 is not documented anywhere in the crawled material.","No OpenAPI spec, request/response examples, or detailed documentation available.","The docs, pricing, and API pages render only 'Connect wallet' with no further content.","The /api/v1/backups/ path does not appear in the provider's listed endpoint categories, raising questions about what this resource actually returns."],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/46","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/46","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, the specific purpose of /api/v1/backups/46 is undocumented, no OpenAPI schema or example responses exist, and the docs/pricing/API pages are empty beyond a wallet-connect prompt. The listing is essentially a stub with verified liveness and 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'/call':16,32 '0.02':15,31,122,132 '000':115 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':99 '20':114 '6':125 'Base USDC API' 'accept':86 'access':40,165 'across':135 'advertis':129 'ai':67 'amount':109 'analyt':66 'api':39,140,164,210 'application/json':91 'backup':180 'backup API' 'backup/data':4,20 'base':7,23,82,101,116 'behind':77 'beyond':159 'broad':62 'call':112 'catalog':63 'categori':174,181 'commit':148 'connect':216 'content':222 'contract':98 'crawl':205 'data':65,185 'data backup endpoint' 'decim':126 'detail':196 'doc':207 'document':158,197 'endpoint':5,21,34,54,85,137,173,190 'equal':121 'exact':104,184 'exampl':199 'financ':70 'flat':131 'found':202 'gate':3,19,76 'generic':161 'host':60 'includ':178 'infrastructur':73 'json-response' 'key':141 'label':162 'land':169 'learn':69 'limit':144 'list':171 'lowpaymentfee backup' 'lowpaymentfee.com':36 'machin':68 'mani':53,172 'maximum':108 'micropay':79 'micropayment' 'minimum':147 'network':83 'no-api-key' 'offer':55 'one':51 'openapi':194 'page':170,211 'paid backup download' 'particular':189 'pay':9,25 'pay-per-request':8,24 'payment':44,93 'per':10,26,111,133 'post':87 'post-method' 'premium':38,163 'premium API access' 'price':208 'prompt':218 'protocol':45 'provid':37,58,128,167 'purpos':151 'rate':143 'render':213 'request':11,27,88,134 'requir':110 'resourc':48,155 'respons':92,200 'return':90,186 'schema':195 'scheme':106 'settl':95 'span':64 'specif':47,150 'unclear':192 'unit':117 'usdc':13,29,97,119,123 'usdc-base' 'use':102,124 'util':74 'via':41 'wallet':217 'web3':71 'x402':2,18,43,78,105 'x402 backup' 'x402-gated':1,17 'x402-payment'","prices":[{"id":"9765942d-860d-45f9-b75a-20226ca551fd","listingId":"18c49b54-d738-4c27-8701-93fa53f3a5eb","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/46","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:23.307Z"}],"sources":[{"listingId":"18c49b54-d738-4c27-8701-93fa53f3a5eb","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/46","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:23.307Z","lastSeenAt":"2026-04-22T10:32:34.156Z"}],"details":{"listingId":"18c49b54-d738-4c27-8701-93fa53f3a5eb","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/46 \\\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 x402Version 1, requiring USDC payment on Base network.","source_url":"https://lowpaymentfee.com/api/v1/backups/46"},{"claim":"maxAmountRequired is 20000 base units of USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02.","source_url":"https://lowpaymentfee.com/api/v1/backups/46"},{"claim":"The provider advertises $0.02/request flat pricing with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The provider lists endpoint categories including Data & Analytics, AI & ML, Finance & Web3, and Infrastructure, but no backups category.","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving backup data (resource ID 46) via a single micropayment","Agent-driven data access without API key provisioning","Pay-per-call data retrieval settled on Base L2"],"bestFor":["Agents that need keyless, pay-as-you-go API access on Base","Developers experimenting with x402 micropayment flows","Automated workflows requiring on-demand backup retrieval"],"notFor":["Users who need detailed documentation or OpenAPI specs before integrating","High-volume batch retrieval where per-call pricing adds up","Anyone needing non-USDC or non-Base payment settlement"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.132Z"},"updatedAt":"2026-04-22T10:32:34.156Z"}}