{"id":"d788705d-cb66-4271-95e3-2ac953ab5f48","shortId":"S9Pbja","kind":"x402","title":"x402-gated backup data endpoint on Base, paid per-request in USDC.","tagline":"x402-gated backup data endpoint on Base, paid per-request in USDC.","description":"This endpoint at lowpaymentfee.com provides access to a backup resource dated 2024-08 via the x402 payment protocol. The endpoint returns an HTTP 402 challenge requiring a one-time USDC payment on the Base network before granting access. The price is 20,000 base units of USDC (6 decimals), which equals $0.02 per request.\n\nThe broader lowpaymentfee.com platform advertises a suite of x402-gated APIs spanning data & analytics (metrics, reports, data export, insights), AI & machine learning (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments. Payments settle in USDC on the Base L2 network.\n\nThe specific endpoint being listed here — `/api/v1/backups/2024-08` — is described only as \"Premium API Access\" and appears to serve backup data for August 2024. No further documentation, request/response schema, or usage examples are available. The docs, pricing, API, and README pages on the site all render only a \"Connect wallet\" prompt with no additional content. Without more detail on what the backup data contains or what request parameters are accepted, the utility of this particular endpoint is unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","backup-data","per-request-pricing","no-api-key"],"categories":["storage","data"],"synonyms":["backup API","data backup endpoint","x402 backup","USDC pay-per-request","lowpaymentfee","premium API access","Base USDC API"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.","No request or response schema provided; it is unknown what parameters the endpoint accepts or what data it returns.","The purpose of 'backups/2024-08' is entirely unclear — no description of the backup contents exists.","The broader platform lists many endpoints but none have documented schemas or examples."],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2024-08","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/2024-08","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, no examples, and no explanation of what the backup data actually contains. The docs pages are empty. This is effectively a stub 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'/api/v1/backups/2024-08':164 '0.02':81,135 '000':72 '20':71 '2024':40,180 '402':52 '6':77 'Base USDC API' 'USDC pay-per-request' 'accept':226 'access':34,67,171 'addit':210 'advertis':88 'ai':104 'analysi':108 'analyt':98 'api':95,140,170,194 'appear':173 'august':179 'avail':190 'backup':4,18,37,176,218 'backup API' 'backup-data' 'base':8,22,63,73,155 'base-network' 'broader':85 'challeng':53 'classif':111 'commit':148 'connect':205 'contain':220 'content':211 'convers':128 'data':5,19,97,101,177,219 'data backup endpoint' 'date':39 'decim':78 'describ':166 'detail':214 'doc':192 'document':183 'embed':112 'endpoint':6,20,30,48,131,160,232 'equal':80 'estim':122 'exampl':188 'exchang':117 'export':102 'feed':116 'financ':113 'gas':121 'gate':3,17,94 'generat':129 'geocod':126 'grant':66 'http':51 'infrastructur':124 'insight':103 'key':141 'l2':156 'learn':106 'limit':144 'list':133,162 'lowpaymentfee' 'lowpaymentfee.com':32,86 'machin':105 'metric':99 'minimum':147 'network':64,157 'no-api-key' 'one':57 'one-tim':56 'page':197 'paid':9,23 'paramet':224 'particular':231 'payment':45,60,149 'per':11,25,82,136 'per-request':10,24 'per-request-pricing' 'platform':87 'premium':169 'premium API access' 'price':69,115,193 'prompt':207 'protocol':46 'provid':33 'quot':120 'rate':118,143 'readm':196 'render':202 'report':100 'request':12,26,83,137,223 'request/response':184 'requir':54 'resourc':38 'return':49 'schema':185 'sentiment':107 'serv':175 'settl':150 'site':200 'span':96 'specif':159 'suit':90 'summar':110 'text':109 'time':58 'token':119 'unclear':234 'unit':74 'usag':187 'usdc':14,28,59,76,152 'usdc-settlement' 'util':125,228 'valid':127 'via':42 'wallet':206 'web3':114 'without':212 'x402':2,16,44,93 'x402 backup' 'x402-gated':1,15,92 'x402-payment'","prices":[{"id":"91e3a71a-d2ec-4de7-b08c-4785c5d32762","listingId":"d788705d-cb66-4271-95e3-2ac953ab5f48","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/2024-08","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:11.286Z"}],"sources":[{"listingId":"d788705d-cb66-4271-95e3-2ac953ab5f48","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2024-08","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:11.286Z","lastSeenAt":"2026-04-22T15:02:33.985Z"}],"details":{"listingId":"d788705d-cb66-4271-95e3-2ac953ab5f48","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2024-08 \\\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 x402Version 1, requiring USDC payment on Base network","source_url":"https://lowpaymentfee.com/api/v1/backups/2024-08"},{"claim":"maxAmountRequired is 20000 base units of USDC (USD Coin, 6 decimals) = $0.02","source_url":"https://lowpaymentfee.com/api/v1/backups/2024-08"},{"claim":"The 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":"The site lists APIs across data & analytics, AI & ML, finance & Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, API, and README pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving archived backup data for August 2024 via a single paid request","Programmatic access to backup resources without API key registration","Agent-driven data retrieval with automatic x402 micropayment settlement"],"bestFor":["Agents or scripts that need on-demand backup data without subscription overhead","Developers experimenting with x402 payment-gated endpoints on Base","Scenarios requiring keyless, pay-per-call API access"],"notFor":["Users who need detailed documentation or schema before integrating","High-volume bulk data retrieval where per-request pricing adds up","Anyone needing non-USDC or non-Base payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.646Z"},"updatedAt":"2026-04-22T15:02:33.985Z"}}