{"id":"9a36b494-561f-4946-8930-396b6e55a3b4","shortId":"pwAdZu","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/12`. It is part of a broader platform offering dozens of x402-gated API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific `/api/v1/backups/12` endpoint accepts POST requests and returns `application/json`. Payment is handled via the x402 protocol: callers must include an `X-PAYMENT` header with a valid payment proof. The max amount required is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. There are no API keys, no rate limits, and no subscription commitments — each call is independently paid.\n\nDocumentation beyond the landing page is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. The exact behavior and response schema of the `/api/v1/backups/12` endpoint are not documented, so the purpose of this specific backup resource (whether it retrieves a stored backup, triggers a backup operation, etc.) cannot be confirmed from available materials. The endpoint is confirmed live via a valid 402 challenge.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","post-method","backup-api"],"categories":["storage","infrastructure"],"synonyms":["backup API","x402 backup","pay-per-call backup","USDC API","Base network API","lowpaymentfee","premium API access","crypto-paid API"],"warnings":["No documentation available for this specific endpoint — docs, pricing, and README pages all show only 'Connect wallet'","The exact purpose and response schema of /api/v1/backups/12 are unknown","No OpenAPI spec or AI plugin manifest found","The endpoint path suggests a specific resource (backup ID 12) rather than a general-purpose API"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/12","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/12","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation for this specific endpoint's request/response schema, no examples, and the docs/pricing/README pages are all empty beyond a wallet-connect prompt. The purpose of '/api/v1/backups/12' is 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'/request':16,32 '0.02':15,31,75,133 '000':122 '0x8335':127 '20':121 '2913':128 '402':228 '6':137 'Base network API' 'USDC API' 'accept':90 'access':41 'ai/ml':65 'amount':118 'analyt':64 'api':40,60,142,166 'application/json':95 'avail':218 'backup':4,20,201,208,211 'backup API' 'backup-api' 'base':7,23,84,123,130 'base-network' 'behavior':184 'beyond':157 'broader':52 'call':11,27,152 'caller':103 'cannot':214 'challeng':229 'commit':150 'confirm':216,223 'connect':175 'content':181 'crypto-paid API' 'data':63,68 'decim':138 'doc':165 'document':156,194 'dozen':55 'endpoint':5,21,34,61,89,191,221 'equal':132 'etc':213 'exact':183 'extrem':162 'finance/web3':67 'gate':3,19,59 'given':134 'handl':98 'header':110 'includ':105 'independ':154 'infer':66 'infrastructur':70 'json-response' 'key':143 'land':159 'limit':146 'live':224 'lowpaymentfee' 'lowpaymentfee.com':36 'materi':219 'max':117 'must':104 'network':85 'offer':54 'oper':212 'page':160,170 'paid':155 'part':49 'path':45 'pay':9,25 'pay-per-cal':8,24 'pay-per-call backup' 'pay-per-request' 'payment':96,109,114 'per':10,26,76 'platform':53 'post':91 'post-method' 'premium':39 'premium API access' 'price':73,167 'prompt':177 'proof':115 'protocol':102 'provid':37 'purpos':197 'rate':145 'readm':169 'render':172 'request':77,92 'requir':119 'resourc':42,202 'respons':186 'retriev':205 'return':94 'schema':187 'settl':79 'span':62 'spars':163 'specif':87,200 'store':207 'subscript':149 'substant':180 'trigger':209 'unit':124 'usdc':13,29,81,126,135 'usdc-settlement' 'util':71 'valid':113,227 'via':99,225 'wallet':176 'whether':203 'x':108 'x-payment':107 'x402':2,18,58,101 'x402 backup' 'x402-gated':1,17,57 'x402-payment'","prices":[{"id":"792986dc-6a2b-4ae5-a901-2961526211e5","listingId":"9a36b494-561f-4946-8930-396b6e55a3b4","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/12","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:44.571Z"}],"sources":[{"listingId":"9a36b494-561f-4946-8930-396b6e55a3b4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/12","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:44.571Z","lastSeenAt":"2026-04-22T18:32:48.874Z"}],"details":{"listingId":"9a36b494-561f-4946-8930-396b6e55a3b4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/12 \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\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 maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/12"},{"claim":"All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/12"}],"useCases":["Triggering or retrieving data backups via a single paid API call","Integrating pay-per-use backup functionality into agent workflows","Programmatic access to backup resources without API key management"],"bestFor":["Agents or developers wanting keyless, pay-per-call API access","Use cases requiring on-chain USDC micropayments on Base","Quick one-off backup operations without subscription overhead"],"notFor":["Users needing detailed documentation or guaranteed SLAs before integrating","High-volume batch operations where per-request pricing adds up quickly","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:28.395Z"},"updatedAt":"2026-04-22T18:32:48.874Z"}}