{"id":"e1003d84-a0f7-4591-adca-eba203e29b70","shortId":"Ut34QX","kind":"x402","title":"x402-gated backup endpoint on Base, paid per-request in USDC at $0.02.","tagline":"x402-gated backup endpoint on Base, paid per-request in USDC at $0.02.","description":"This endpoint at lowpaymentfee.com provides a \"Premium API Access\" resource at the path `/api/v1/backups/30`. It is part of a broader platform that offers dozens of pay-per-call 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/30` endpoint accepts POST requests and is priced at a maximum of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request. Payment is settled on-chain via the x402 \"exact\" scheme with a 300-second timeout. No API keys or rate limits are advertised; access is granted purely through the x402 payment header.\n\nDocumentation is extremely sparse. The landing page lists available endpoints and pricing but the /docs, /pricing, /api, and /README pages all render only a \"Connect wallet\" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema beyond the x402 challenge's `outputSchema` stub, and no description of what the \"backups/30\" resource actually returns. The endpoint is confirmed live (HTTP 402 challenge captured), but the actual payload and use case for this specific path remain unclear.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","backup-api","post-method"],"categories":["storage","infrastructure"],"synonyms":["backup API","premium API access","x402 backup","lowpaymentfee","USDC micropayment API","Base network API","pay-per-call backup"],"warnings":["No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet'","No OpenAPI or request/response schema provided","The purpose of the /api/v1/backups/30 resource is completely undocumented","No examples of request body or response payload available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/30","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/30","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 x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI spec, no request/response schema, and no explanation of what the /backups/30 resource actually returns. The docs, pricing, and README pages are all blank beyond a wallet-connect prompt. This is effectively a stub 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'/api/v1/backups/30':44,85 '/docs':159 '/pricing':160 '/readme':163 '0.02':15,30,109 '000':98 '0x8335':103 '20':97 '2913':104 '300':125 '402':208 'Base network API' 'USDC micropayment API' 'accept':87 'access':39,136 'actual':200,213 'advertis':135 'ai/ml':65 'analyt':64 'api':38,60,129 'avail':153 'backup':4,19 'backup API' 'backup-api' 'backups/30':198 'base':7,22,81,99,106 'beyond':185 'broader':50 'call':59 'captur':210 'case':217 'chain':117 'challeng':188,209 'confirm':205 'connect':169 'data':63,68 'descript':194 'detail':176 'document':145 'dozen':54 'endpoint':5,20,32,61,86,154,203 'equal':108 'exact':121 'extrem':147 'finance/web3':67 'gate':3,18,73 'grant':138 'header':144 'http':207 'infer':66 'infrastructur':70 'key':130 'land':150 'limit':133 'list':152 'live':206 'lowpaymentfee' 'lowpaymentfee.com':34 'maximum':95 'network':82 'offer':53 'on-chain':115 'openapi':180 'outputschema':190 'page':151,164 'paid':8,23 'part':47 'path':43,221 'pay':57 'pay-per-cal':56 'pay-per-call backup' 'pay-per-request' 'payload':214 'payment':77,112,143 'per':10,25,58,110 'per-request':9,24 'platform':51 'post':88 'post-method' 'premium':37 'premium API access' 'price':92,156 'prompt':171 'protocol':78 'provid':35 'pure':139 'rate':132 'remain':222 'render':166 'request':11,26,89,111 'request/response':183 'resourc':40,199 'return':201 'schema':184 'scheme':122 'second':126 'settl':114 'span':62 'spars':148 'spec':181 'specif':84,220 'stub':191 'technic':175 'timeout':127 'unclear':223 'unit':100 'usdc':13,28,102 'usdc-base' 'use':216 'util':71 'via':74,118 'wallet':170 'x402':2,17,76,120,142,187 'x402 backup' 'x402-gated':1,16 'x402-payment'","prices":[{"id":"3e552bda-7d31-4bed-bed0-83041576106a","listingId":"e1003d84-a0f7-4591-adca-eba203e29b70","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/30","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:22.144Z"}],"sources":[{"listingId":"e1003d84-a0f7-4591-adca-eba203e29b70","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/30","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:22.144Z","lastSeenAt":"2026-04-22T12:04:54.167Z"}],"details":{"listingId":"e1003d84-a0f7-4591-adca-eba203e29b70","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/30 \\\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 endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/30"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/30"}],"useCases":["Retrieving backup data via a single paid POST request","Programmatic access to backup resources without API key management","Agent-driven data retrieval with on-chain USDC micropayments"],"bestFor":["Developers wanting key-less, pay-per-use API access on Base","AI agents that can settle x402 payments autonomously","Users who prefer on-chain micropayments over subscription billing"],"notFor":["Users needing detailed API documentation or schemas before integrating","High-volume batch operations where per-request fees add up","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.135Z"},"updatedAt":"2026-04-22T12:04:54.167Z"}}