{"id":"7ec318b8-4ccf-4f2c-96b6-4eb2534f34f7","shortId":"CjcnL8","kind":"x402","title":"x402-gated backup endpoint on Base, pay-per-request with USDC at $0.02/call.","tagline":"x402-gated backup 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/22`. It is part of a broader platform offering 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/22` endpoint accepts POST requests and returns `application/json`. Payment is settled in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The payment timeout is 300 seconds. No API keys or rate limits are advertised; access is granted purely through the x402 payment header.\n\nThe platform's landing page lists a uniform $0.02 per request pricing across all endpoints. Documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all returned only a \"Connect wallet\" prompt with no further content, so the actual behavior and response schema of this particular backup endpoint remain unclear. The endpoint name \"backups/22\" and description \"Premium API Access\" are generic and do not reveal what data or functionality is returned.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","post-method"],"categories":["storage","infrastructure"],"synonyms":["backup API","premium API access","x402 backup endpoint","lowpaymentfee","pay-per-call API","USDC API","Base network API"],"warnings":["The purpose and response format of /api/v1/backups/22 are unknown — 'Premium API Access' is a generic label with no further explanation.","All documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no usable content.","No OpenAPI spec, no output schema beyond mimeType application/json, and no example responses are available.","The endpoint path 'backups/22' suggests a specific resource ID; it is unclear what backup data this refers to or whether it is a demo/test resource."],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/22","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/22","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no example requests or responses, and the purpose of the '/api/v1/backups/22' resource is entirely opaque. All doc pages returned only 'Connect wallet' with no 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'/api/v1/backups/22':46,86 '/call':16,32 '/docs':159 '/pricing':160 '/readme':162 '0.02':15,31,114,150 '000':109 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':100 '20':108 '300':123 '6':117 'Base network API' 'USDC API' 'accept':88 'access':41,133,196 'across':154 'actual':176 'advertis':132 'ai/ml':66 'amount':106 'analyt':65 'api':40,61,126,195 'application/json':93 'backup':4,20,184 'backup API' 'backups/22':191 'base':7,23,82,102,110 'base-network' 'behavior':177 'broader':52 'call':60 'connect':167 'content':173 'contract':99 'data':64,69,204 'decim':118 'descript':193 'document':157 'dozen':55 'endpoint':5,21,34,62,87,156,185,189 'equal':113 'finance/web3':68 'function':206 'gate':3,19,74 'generic':198 'grant':135 'header':141 'infer':67 'infrastructur':71 'json-response' 'key':127 'land':145 'limit':130 'list':147 'lowpaymentfee' 'lowpaymentfee.com':36 'maximum':105 'name':190 'network':83 'offer':54 'page':146,158 'part':49 'particular':183 'path':45 'pay':9,25,58 'pay-per-cal':57 'pay-per-call API' 'pay-per-request':8,24 'payment':78,94,120,140 'per':10,26,59,151 'platform':53,143 'post':89 'post-method' 'premium':39,194 'premium API access' 'price':153 'prompt':169 'protocol':79 'provid':37 'pure':136 'rate':129 'remain':186 'request':11,27,90,152 'resourc':42 'respons':179 'return':92,164,208 'reveal':202 'schema':180 'second':124 'settl':96 'span':63 'specif':85 'timeout':121 'unclear':187 'uniform':149 'unit':111 'usdc':13,29,98,115 'usdc-settlement' 'use':116 'util':72 'via':75 'wallet':168 'x402':2,18,77,139 'x402 backup endpoint' 'x402-gated':1,17 'x402-payment'","prices":[{"id":"90fd5d8f-7cd4-4db7-ae87-245b0e5c4d2c","listingId":"7ec318b8-4ccf-4f2c-96b6-4eb2534f34f7","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/22","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:26.267Z"}],"sources":[{"listingId":"7ec318b8-4ccf-4f2c-96b6-4eb2534f34f7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/22","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:26.267Z","lastSeenAt":"2026-04-22T10:32:34.387Z"}],"details":{"listingId":"7ec318b8-4ccf-4f2c-96b6-4eb2534f34f7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/22 \\\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 in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/22"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/backups/22"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages returned only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving backup data or resources behind a micropayment wall","Agent-driven programmatic access to paid API endpoints without API keys","Demonstrating x402 payment protocol integration on Base"],"bestFor":["Developers experimenting with x402 payment-gated APIs","Agents that can settle USDC payments on Base L2","Use cases requiring keyless, pay-per-call API access"],"notFor":["Users who need detailed documentation or response schema 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":"2026-02-17T23:13:26.886Z"},"updatedAt":"2026-04-22T10:32:34.387Z"}}