{"id":"a9ee8bb6-5df3-4618-8c88-c4dc25165919","shortId":"55kuEj","kind":"x402","title":"x402-gated backup/export endpoint on Base, pay $0.02 per request in USDC with no API keys.","tagline":"x402-gated backup/export endpoint on Base, pay $0.02 per request in USDC with no API keys.","description":"This endpoint at lowpaymentfee.com provides premium API access to a backup resource (`/api/v1/backups/2025-05`) via the x402 payment protocol. It is part of a broader platform offering data & analytics, AI/ML inference, finance/Web3, and infrastructure utility APIs—all gated behind per-request USDC micropayments on the Base network.\n\nThe specific endpoint probed serves backup data for May 2025. Payment is settled on-chain using USDC (contract `0x8335...2913` on Base) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys, rate limits, or subscriptions are required; callers simply attach an `X-PAYMENT` header conforming to x402 version 1. The response MIME type is `application/json`.\n\nThe platform advertises a uniform $0.02/request pricing across all its endpoints, covering categories like metrics, reports, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, and more. Documentation pages exist but appear to require wallet connection and contain no additional technical detail beyond the landing page.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","backup-export","json-response","no-api-key","per-request-billing"],"categories":["storage","data"],"synonyms":["data backup API","x402 backup endpoint","USDC pay-per-call","Base network API","micropayment API","lowpaymentfee","premium data export"],"warnings":["No documentation available beyond the landing page—docs, pricing, and README pages all show only 'Connect wallet'.","The purpose and schema of the /api/v1/backups/2025-05 response body is undocumented.","Platform legitimacy and data provenance are unverifiable from available material."],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2025-05","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/2025-05","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.400","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear, but there is no OpenAPI schema, no documented request/response body, and the docs pages are empty beyond a wallet-connect prompt. The actual data returned by this backup endpoint is 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'/request':153 '0.02':9,26,109,152 '000':113 '0x8335':101 '1':140 '20':112 '2025':91 '2913':102 '6':117 'Base network API' 'USDC pay-per-call' 'access':42 'across':155 'addit':189 'advertis':149 'ai/ml':63 'analysi':165 'analyt':62 'api':16,33,41,69,120 'appear':181 'application/json':146 'attach':130 'backup':45,87 'backup-export' 'backup/export':4,21 'base':7,24,80,104,114 'base-network' 'behind':72 'beyond':192 'broader':58 'caller':128 'categori':160 'chain':97 'classif':168 'conform':136 'connect':185 'contain':187 'contract':100 'cost':107 'cover':159 'data':61,88 'data backup API' 'decim':118 'detail':191 'document':177 'embed':169 'endpoint':5,22,36,84,158 'exchang':172 'exist':179 'feed':171 'finance/web3':65 'gate':3,20,71 'geocod':174 'header':135 'infer':64 'infrastructur':67 'json-response' 'key':17,34,121 'land':194 'like':161 'limit':123 'lowpaymentfee' 'lowpaymentfee.com':38 'may':90 'metric':162 'micropay':77 'micropayment API' 'mime':143 'network':81 'no-api-key' 'offer':60 'on-chain':95 'page':178,195 'part':55 'pay':8,25 'payment':51,92,134 'per':10,27,74,110 'per-request':73 'per-request-billing' 'platform':59,148 'premium':40 'premium data export' 'price':154,170 'probe':85 'protocol':52 'provid':39 'rate':122,173 'report':163 'request':11,28,75,111 'requir':127,183 'resourc':46 'respons':142 'sentiment':164 'serv':86 'settl':94 'simpli':129 'specif':83 'subscript':125 'summar':167 'technic':190 'text':166 'type':144 'uniform':151 'unit':115 'usdc':13,30,76,99 'usdc-micropayment' 'use':98 'util':68 'version':139 'via':48 'wallet':184 'x':133 'x-payment':132 'x402':2,19,50,138 'x402 backup endpoint' 'x402-gated':1,18 'x402-payment'","prices":[{"id":"8a5b9240-201a-493e-a585-0afd9bd6ec58","listingId":"a9ee8bb6-5df3-4618-8c88-c4dc25165919","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/2025-05","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:13.725Z"}],"sources":[{"listingId":"a9ee8bb6-5df3-4618-8c88-c4dc25165919","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2025-05","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:13.725Z","lastSeenAt":"2026-04-22T13:32:03.043Z"}],"details":{"listingId":"a9ee8bb6-5df3-4618-8c88-c4dc25165919","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2025-05 \\\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":"Endpoint returns 402 with x402 version 1 challenge requiring USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-05"},{"claim":"maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-05"},{"claim":"Platform advertises $0.02/request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving monthly backup snapshots via automated agents","Paying per-request for data exports without managing API keys","Integrating x402-compatible payment flows into agent pipelines"],"bestFor":["Agents that need on-demand backup/export data with no subscription","Developers testing x402 micropayment integrations on Base","Workflows requiring keyless, pay-as-you-go API access"],"notFor":["High-volume batch jobs where per-request fees add up quickly","Users without a Base-network USDC wallet","Applications needing guaranteed SLA or support contracts"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.514Z"},"updatedAt":"2026-04-22T13:32:03.043Z"}}