{"id":"2c9cf773-24ee-4ce2-81c5-c10947f9e8b6","shortId":"xGSEsa","kind":"x402","title":"x402-gated backup endpoint on Base, pay-per-call with USDC at $0.02/request.","tagline":"x402-gated backup endpoint on Base, pay-per-call with USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides a \"Premium API Access\" resource at the path `/api/v1/backups/2`. It is part of a broader platform offering dozens of pay-per-request API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all gated via the x402 payment protocol on the Base network.\n\nThe specific `/api/v1/backups/2` endpoint accepts POST requests and returns `application/json`. Payment is settled in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base) using the x402 \"exact\" scheme. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. The platform advertises a flat $0.02 per request across all its endpoints, with no API keys, no rate limits, and no minimum commitments.\n\nDocumentation is extremely sparse — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples. The endpoint name \"backups/2\" and description \"Premium API Access\" give little indication of what data or functionality is actually returned. The endpoint is confirmed live (returns a proper 402 x402 challenge), but without documentation it is unclear what payload to send or what response to expect.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","post-method"],"categories":["storage","infrastructure"],"synonyms":["backup API","premium access endpoint","x402 backup","lowpaymentfee","pay-per-call API","USDC micropayment API","Base network API"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'","No OpenAPI or schema definition for request or response payloads","The purpose of '/api/v1/backups/2' is unclear — 'Premium API Access' is a generic label","No examples of expected input or output"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2","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/2","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 with a valid x402 402 challenge and clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no explanation of what the 'backups/2' resource actually provides. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub 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'/request':16,32 '0.02':15,31,125,132 '000':116 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':100 '20':115 '402':213 '6':121 'Base network API' 'USDC micropayment API' 'accept':88 'access':41,193 'across':135 'actual':203 'advertis':129 'ai/ml':66 'amount':110 'analyt':65 'api':40,61,141,157,192 'application/json':93 'backup':4,20 'backup API' 'backups/2':188 'base':7,23,82,102,117 'base-network' 'broader':52 'call':11,27,113 'challeng':215 'commit':149 'confirm':208 'connect':165 'content':171 'contract':99 'data':64,69,199 'decim':122 'descript':190 'doc':155 'document':150,180,218 'dozen':55 'endpoint':5,21,34,62,87,138,186,206 'equal':124 'exact':106 'exampl':184 'expect':230 'extrem':152 'finance/web3':68 'flat':131 'function':201 'gate':3,19,74 'give':194 'indic':196 'infer':67 'infrastructur':71 'json-response' 'key':142 'limit':145 'littl':195 'live':209 'lowpaymentfee' 'lowpaymentfee.com':36 'maximum':109 'minimum':148 'name':187 'network':83 'offer':54 'openapi':175 'page':160 'part':49 'path':45 'pay':9,25,58 'pay-per-cal':8,24 'pay-per-call API' 'pay-per-request':57 'payload':223 'payment':78,94 'per':10,26,59,112,133 'platform':53,128 'post':89 'post-method' 'premium':39,191 'premium access endpoint' 'price':156 'prompt':167 'proper':212 'protocol':79 'provid':37 'rate':144 'readm':159 'render':162 'request':60,90,134 'request/response':178 'requir':111 'resourc':42 'respons':228 'return':92,204,210 'schema':179 'scheme':107 'send':225 'settl':96 'span':63 'spars':153 'spec':176 'specif':85 'unclear':221 'unit':118 'usag':183 'usd':126 'usdc':13,29,98,120 'usdc-settlement' 'use':103 'util':72 'via':75 'wallet':166 'without':217 'x402':2,18,77,105,214 'x402 backup' 'x402-gated':1,17 'x402-payment'","prices":[{"id":"84b70754-57db-4f18-bb95-8b75497e5df6","listingId":"2c9cf773-24ee-4ce2-81c5-c10947f9e8b6","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/2","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:54.015Z"}],"sources":[{"listingId":"2c9cf773-24ee-4ce2-81c5-c10947f9e8b6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:54.015Z","lastSeenAt":"2026-04-22T15:02:33.729Z"}],"details":{"listingId":"2c9cf773-24ee-4ce2-81c5-c10947f9e8b6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2 \\\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/2"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/backups/2"},{"claim":"Platform advertises $0.02/request flat pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The platform 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","Agent-driven data retrieval with per-request USDC micropayments","Programmatic access to premium resources without API key management"],"bestFor":["Developers wanting keyless, pay-per-use API access on Base","AI agents that can settle x402 payments in USDC","Users who prefer no-commitment, no-rate-limit API consumption"],"notFor":["Users who need detailed API documentation or schemas before integrating","Anyone without a Base-compatible USDC wallet","High-volume consumers who need bulk pricing or subscription plans"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.892Z"},"updatedAt":"2026-04-22T15:02:33.729Z"}}