{"id":"0daf5dfe-7c00-427a-b048-c5aa764a13b3","shortId":"A4yync","kind":"x402","title":"x402-gated backup data endpoint on Base, payable in USDC per request.","tagline":"x402-gated backup data endpoint on Base, payable in USDC per request.","description":"This endpoint at lowpaymentfee.com provides access to a backup resource dated 2024-02 via the x402 payment protocol. It is part of a broader platform that offers a variety of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all gated behind x402 micropayments on the Base network using USDC.\n\nThe specific endpoint `/api/v1/backups/2024-02` returns JSON and costs $0.02 per request (20,000 base units of USDC with 6 decimals). Payment is made via the x402 \"exact\" scheme: callers include an X-PAYMENT header with a signed payment to the provider's address on Base. There are no API keys, no rate limits, and no subscription commitments — each call is independently settled on-chain.\n\nThe platform's landing page lists roughly 16 endpoints across four categories (Data & Analytics, AI & Machine Learning, Finance & Web3, Infrastructure), all priced at $0.02 per request. However, documentation beyond the landing page is essentially empty (all doc/pricing/API pages just show \"Connect wallet\"), so the actual behavior, request parameters, and response schemas for this backup endpoint are unknown. The endpoint is confirmed live via a valid 402 challenge.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","backup-data","json-response","pay-per-request","no-api-key"],"categories":["storage","data"],"synonyms":["backup API","data backup endpoint","x402 backup","USDC micropayment API","lowpaymentfee","Base network API","pay-per-call backup"],"warnings":["No documentation available — all doc/pricing/API pages are empty ('Connect wallet' only)","No request or response schema provided; the actual data returned by this backup endpoint is unknown","The endpoint path suggests a date-specific backup resource but its contents and format are undocumented","No OpenAPI spec or ai-plugin manifest found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2024-02","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/2024-02","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, no OpenAPI schema, no request/response examples, and the purpose of the 'backups/2024-02' resource is entirely opaque. All doc pages return only 'Connect wallet' with no 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'/api/v1/backups/2024-02':86 '0.02':91,172 '000':95 '16':156 '20':94 '2024':38 '402':214 '6':101 'Base network API' 'USDC micropayment API' 'access':32 'across':158 'actual':193 'address':126 'ai':163 'ai/ml':65 'analyt':64,162 'api':61,132 'backup':4,17,35,202 'backup API' 'backup-data' 'base':8,21,79,96,128 'base-network' 'behavior':194 'behind':74 'beyond':177 'broader':50 'call':142 'caller':111 'categori':160 'chain':148 'challeng':215 'commit':140 'confirm':209 'connect':189 'cost':90 'data':5,18,63,68,161 'data backup endpoint' 'date':37 'decim':102 'doc/pricing/api':185 'document':176 'empti':183 'endpoint':6,19,28,85,157,203,207 'essenti':182 'exact':109 'financ':166 'finance/web3':67 'four':159 'gate':3,16,73 'header':117 'howev':175 'includ':112 'independ':144 'infer':66 'infrastructur':70,168 'json':88 'json-response' 'key':133 'land':152,179 'learn':165 'limit':136 'list':154 'live':210 'lowpaymentfee' 'lowpaymentfee.com':30 'machin':164 'made':105 'micropay':76 'network':80 'no-api-key' 'offer':53 'on-chain':146 'page':153,180,186 'paramet':196 'part':47 'pay':58 'pay-per-call backup' 'pay-per-request':57 'payabl':9,22 'payment':43,103,116,121 'per':12,25,59,92,173 'platform':51,150 'price':170 'protocol':44 'provid':31,124 'rate':135 'request':13,26,60,93,174,195 'resourc':36 'respons':198 'return':87 'rough':155 'schema':199 'scheme':110 'settl':145 'show':188 'sign':120 'span':62 'specif':84 'subscript':139 'unit':97 'unknown':205 'usdc':11,24,82,99 'usdc-settlement' 'use':81 'util':71 'valid':213 'varieti':55 'via':40,106,211 'wallet':190 'web3':167 'x':115 'x-payment':114 'x402':2,15,42,75,108 'x402 backup' 'x402-gated':1,14 'x402-payment'","prices":[{"id":"a8b2cc86-6da3-44ea-84ca-8a07b3a22058","listingId":"0daf5dfe-7c00-427a-b048-c5aa764a13b3","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/2024-02","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:52.820Z"}],"sources":[{"listingId":"0daf5dfe-7c00-427a-b048-c5aa764a13b3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2024-02","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:52.820Z","lastSeenAt":"2026-04-22T16:32:26.140Z"}],"details":{"listingId":"0daf5dfe-7c00-427a-b048-c5aa764a13b3","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2024-02 \\\n  -H \"X-PAYMENT: <signed-x402-payment-header>\" \\\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 x402Version 1, exact scheme, on Base network, asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (USDC), maxAmountRequired 20000","source_url":"https://lowpaymentfee.com/api/v1/backups/2024-02"},{"claim":"The platform lists ~16 endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories, all priced at $0.02 per request","source_url":"https://lowpaymentfee.com"},{"claim":"Platform advertises no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation, pricing, API, and README pages all render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving archived backup data from February 2024","Programmatic access to backup snapshots without API key management","Agent-driven data retrieval with on-chain micropayments"],"bestFor":["Agents or scripts that need keyless, pay-per-call access to backup data","Developers experimenting with x402 payment flows on Base","Scenarios requiring no subscription commitment for occasional data retrieval"],"notFor":["Users who need detailed API documentation or request/response schemas before integrating","High-volume bulk data retrieval where per-request pricing adds up","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:28.015Z"},"updatedAt":"2026-04-22T16:32:26.140Z"}}