{"id":"32934863-ddd1-4873-a544-4f3dba6363f7","shortId":"hSRxRw","kind":"x402","title":"x402-gated backup/data endpoint on Base, paying $0.02 per request in USDC.","tagline":"x402-gated backup/data endpoint on Base, paying $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides access to a resource described as \"Premium API Access\" at the path `/api/v1/backups/2024-12`. It is part of a broader platform offering numerous x402-payable API endpoints spanning data & analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.\n\nThe specific `/api/v1/backups/2024-12` endpoint appears to serve backup data for December 2024. The x402 challenge confirms the endpoint is live, accepting POST requests, and requiring an exact payment of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals → $0.02) per call. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout. No API keys or rate limits are advertised; access is purely pay-per-request via the x402 protocol.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the backup data actually contains or what POST body (if any) is expected. The platform lists many other endpoints on its landing page, but none have documented schemas either. Treat this as a low-documentation endpoint where the actual response payload is unknown until you pay and call it.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","backup-data","json-response","post-method"],"categories":["storage","data"],"synonyms":["backup API","data export","premium API","x402 endpoint","USDC micropayment API","Base network API","pay-per-call API"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content","No OpenAPI or request/response schema provided; the expected POST body and response format are completely unknown","The nature of the 'backups/2024-12' data is undocumented — unclear what is actually returned","No robots.txt or agents.txt present"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2024-12","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/2024-12","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on request format, response schema, or what the backup data actually contains. No OpenAPI spec, no examples, and all doc pages are empty beyond a wallet-connect prompt. This is effectively a stub 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'0.02':9,22,71,122 '000':111 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':130 '0x8335':116 '20':110 '2024':92 '2913':117 '300':133 '6':120 'Base network API' 'USDC micropayment API' 'accept':101 'access':32,40,144 'actual':193,229 'address':129 'advertis':143 'ai/ml':62 'analyt':61 'api':39,57,137,161 'appear':85 'backup':88,191 'backup API' 'backup-data' 'backup/data':4,17 'base':7,20,79,112,119 'bodi':198 'broader':50 'call':124,238 'challeng':95 'confirm':96 'connect':170 'contain':194 'content':176 'data':60,89,192 'data export' 'decemb':91 'decim':121 'describ':36 'descript':187 'doc':160 'document':155,216,225 'either':218 'endpoint':5,18,28,58,84,98,208,226 'exact':107 'exampl':184 'expect':202 'extrem':157 'finance/web3':64 'gate':3,16 'infer':63 'infrastructur':66 'json-response' 'key':138 'land':211 'limit':141 'list':205 'live':100 'low':224 'low-document':223 'lowpaymentfee.com':30 'mani':206 'network':80 'none':214 'numer':53 'offer':52 'openapi':180 'page':165,212 'part':47 'path':43 'pay':8,21,148,236 'pay-per-call API' 'pay-per-request':147 'payabl':56 'payload':231 'payment':108,125 'per':10,23,72,123,149 'platform':51,204 'post':102,197 'post-method' 'premium':38 'premium API' 'price':69,162 'prompt':172 'protocol':154 'provid':31 'pure':146 'rate':140 'readm':164 'render':167 'request':11,24,73,103,150 'request/response':183 'requir':105 'resourc':35 'respons':230 'schema':181,217 'second':134 'sent':127 'serv':87 'settl':74 'span':59 'spars':158 'specif':82 'timeout':135 'treat':219 'unit':113 'unknown':233 'usdc':13,26,76,115 'usdc-base' 'util':67 'via':151 'wallet':171 'x402':2,15,55,94,153 'x402 endpoint' 'x402-gated':1,14 'x402-payable':54 'x402-payment'","prices":[{"id":"f3a21f8b-8ec0-4d12-b07c-3f19b772fb4a","listingId":"32934863-ddd1-4873-a544-4f3dba6363f7","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/2024-12","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:18.544Z"}],"sources":[{"listingId":"32934863-ddd1-4873-a544-4f3dba6363f7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2024-12","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:18.544Z","lastSeenAt":"2026-04-22T12:04:53.984Z"}],"details":{"listingId":"32934863-ddd1-4873-a544-4f3dba6363f7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2024-12 \\\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 challenge requiring 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/backups/2024-12"},{"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":"Payment address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout","source_url":"https://lowpaymentfee.com/api/v1/backups/2024-12"}],"useCases":["Retrieving archived backup data for December 2024 via a single paid API call","Programmatic access to backup snapshots without API key management","Agent-driven data retrieval with automatic USDC micropayment on Base"],"bestFor":["Agents or scripts that need on-demand backup data without subscription overhead","Developers wanting keyless, pay-per-use API access settled on Base L2","Automated workflows requiring x402-compatible data endpoints"],"notFor":["Users who need detailed documentation or schema guarantees before calling","High-volume bulk data retrieval where per-request pricing adds up quickly","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.265Z"},"updatedAt":"2026-04-22T12:04:53.984Z"}}