{"id":"484f4c38-8614-4570-8ebb-c437bd796545","shortId":"XeU39F","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 2023-07 via the x402 payment protocol. It is part of a broader platform that offers dozens of pay-per-request API endpoints 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/2023-07` accepts POST requests and requires an X-PAYMENT header conforming to x402 version 1. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. Payment is settled on the Base L2 network to the specified payTo address. The platform advertises no API keys, no rate limits, and instant access — you pay per call with no minimums or commitments.\n\nWhile the platform lists many endpoint categories (analytics, AI, finance, utilities), this particular endpoint appears to serve archived backup data from July 2023. The crawled documentation pages were essentially empty (showing only \"Connect wallet\"), so there is no detailed schema documentation, request/response examples, or explanation of what the backup data contains. The endpoint is confirmed live via a valid 402 challenge response.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","backup-data","pay-per-request","no-api-key"],"categories":["storage","data"],"synonyms":["x402 backup API","USDC micropayment API","Base network API","pay-per-call data","lowpaymentfee backup","archived data endpoint"],"warnings":["No documentation available — all doc pages returned only 'Connect wallet' placeholder content","No request body schema or response schema documented; unknown what data the backup endpoint returns","The endpoint path suggests archived/static data (2023-07) — unclear if this is still relevant or maintained","The platform lists many endpoint categories but none have documented schemas"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2023-07","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/2023-07","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/request in USDC on Base). However, there is no documentation, no request/response schema, and no explanation of what the backup data actually contains. The docs, pricing, API, and README pages all returned only 'Connect wallet' with no useful 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'/api/v1/backups/2023-07':86 '0.02':117 '000':108 '1':101 '20':107 '2023':38,176 '402':213 '6':113 'Base network API' 'USDC micropayment API' 'accept':87 'access':32,144 'address':132 'advertis':135 'ai':162 'ai/ml':65 'amount':104 'analyt':64,161 'api':60,137 'appear':168 'archiv':171 'archived data endpoint' 'backup':4,17,35,172,202 'backup-data' 'base':8,21,79,109,125 'base-network' 'behind':74 'broader':50 'call':148 'categori':160 'challeng':214 'commit':153 'confirm':208 'conform':97 'connect':186 'contain':204 'crawl':178 'data':5,18,63,68,173,203 'date':37 'decim':114 'detail':192 'document':179,194 'dozen':54 'empti':183 'endpoint':6,19,28,61,85,159,167,206 'equal':116 'essenti':182 'exampl':196 'explan':198 'financ':163 'finance/web3':67 'gate':3,16,73 'header':96 'infer':66 'infrastructur':70 'instant':143 'juli':175 'key':138 'l2':126 'limit':141 'list':157 'live':209 'lowpaymentfee backup' 'lowpaymentfee.com':30 'mani':158 'maximum':103 'micropay':76 'minimum':151 'network':80,127 'no-api-key' 'offer':53 'page':180 'part':47 'particular':166 'pay':57,146 'pay-per-call data' 'pay-per-request':56 'payabl':9,22 'payment':43,95,120 'payto':131 'per':12,25,58,118,147 'platform':51,134,156 'post':88 'protocol':44 'provid':31 'rate':140 'request':13,26,59,89,119 'request/response':195 'requir':91,105 'resourc':36 'respons':215 'schema':193 'serv':170 'settl':122 'show':184 'span':62 'specif':84 'specifi':130 'unit':110 'usdc':11,24,82,112 'usdc-micropayment' 'use':81 'util':71,164 'valid':212 'version':100 'via':40,210 'wallet':187 'x':94 'x-payment':93 'x402':2,15,42,75,99 'x402 backup API' 'x402-gated':1,14 'x402-payment'","prices":[{"id":"d2781ff1-cc67-4ee1-aa9b-02e0dc25207b","listingId":"484f4c38-8614-4570-8ebb-c437bd796545","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/2023-07","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:53.412Z"}],"sources":[{"listingId":"484f4c38-8614-4570-8ebb-c437bd796545","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2023-07","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:53.412Z","lastSeenAt":"2026-04-22T15:02:33.680Z"}],"details":{"listingId":"484f4c38-8614-4570-8ebb-c437bd796545","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2023-07 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\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 x402 version 1, requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/backups/2023-07"},{"claim":"maxAmountRequired is 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/backups/2023-07"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages (docs, api, pricing, README) all returned only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving archived backup data from July 2023 via a single micropayment","Programmatic access to backup resources without API key registration","Agent-driven data retrieval with on-chain USDC settlement on Base"],"bestFor":["Agents or scripts that need one-off access to archived backup data","Developers who prefer pay-per-request over subscription models","Use cases requiring keyless, permissionless API access"],"notFor":["Users needing detailed documentation or response schema guarantees before purchasing","Bulk data retrieval where per-request pricing would be cost-inefficient","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.993Z"},"updatedAt":"2026-04-22T15:02:33.680Z"}}