{"id":"8bad8df8-47cc-4a38-b0cd-5364a8aa3247","shortId":"Tedt2b","kind":"x402","title":"x402-gated backup/data endpoint on Base, pay $0.02 per request in USDC — no API keys required.","tagline":"x402-gated backup/data endpoint on Base, pay $0.02 per request in USDC — no API keys required.","description":"This endpoint at lowpaymentfee.com provides access to a resource described as \"Premium API Access\" at the path `/api/v1/backups/2026-03`. It is part of a broader platform offering dozens of x402-payable API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.\n\nThe specific `/api/v1/backups/2026-03` path suggests a dated backup or archival data resource (March 2026). The x402 challenge confirms the endpoint is live, accepting POST requests, and requires an exact payment of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals → $0.02) per call. Payment is made via the X-PAYMENT header with no API keys, rate limits, or subscriptions needed.\n\nDocumentation on the site is extremely thin — the docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the backup endpoint actually returns. The platform's landing page lists the endpoint categories and uniform pricing but provides no technical detail about input parameters or response formats.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","per-request-pricing","no-api-key","backup-data","post-method"],"categories":["storage","data"],"synonyms":["backup API","data export","archival data","x402 endpoint","pay-per-request API","USDC API","Base network API","lowpaymentfee"],"warnings":["No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content","No OpenAPI or request/response schema provided; input parameters and response format are unknown","The path '/api/v1/backups/2026-03' suggests a future date (March 2026), which is unusual and may indicate placeholder or test data","The platform lists many endpoint categories but provides no technical details for any of them"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2026-03","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/2026-03","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing, but there is zero documentation on what the endpoint accepts or returns. No OpenAPI schema, no examples, and all doc pages are empty. The specific purpose of the /backups/2026-03 path is 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'0.02':9,26,81,134 '000':123 '0x8335':128 '20':122 '2026':104 '2913':129 '6':132 'Base network API' 'USDC API' 'accept':113 'access':40,48 'actual':196 'ai/ml':71 'analyt':70 'api':15,32,47,66,148,165 'archiv':100 'archival data' 'backup':98,194 'backup API' 'backup-data' 'backup/data':4,21 'base':7,24,89,124,131 'base-network' 'broader':58 'call':136 'categori':206 'challeng':107 'confirm':108 'connect':173 'content':179 'data':69,74,101 'data export' 'date':97 'decim':133 'describ':44 'descript':190 'detail':214 'doc':163 'document':155 'dozen':61 'endpoint':5,22,36,67,110,195,205 'exact':119 'exampl':187 'extrem':160 'finance/web3':73 'format':220 'gate':3,20 'header':145 'infer':72 'infrastructur':76 'input':216 'key':16,33,149 'land':201 'limit':151 'list':203 'live':112 'lowpaymentfee' 'lowpaymentfee.com':38 'made':139 'march':103 'need':154 'network':90 'no-api-key' 'offer':60 'openapi':183 'page':168,202 'paramet':217 'part':55 'path':51,94 'pay':8,25 'pay-per-request API' 'payabl':65 'payment':120,137,144 'per':10,27,82,135 'per-request-pricing' 'platform':59,199 'post':114 'post-method' 'premium':46 'price':79,164,209 'prompt':175 'provid':39,211 'rate':150 'readm':167 'render':170 'request':11,28,83,115 'request/response':186 'requir':17,34,117 'resourc':43,102 'respons':219 'return':197 'schema':184 'settl':84 'site':158 'span':68 'specif':92 'subscript':153 'substant':178 'suggest':95 'technic':213 'thin':161 'uniform':208 'unit':125 'usdc':13,30,86,127 'usdc-settlement' 'util':77 'via':140 'wallet':174 'x':143 'x-payment':142 'x402':2,19,64,106 'x402 endpoint' 'x402-gated':1,18 'x402-payable':63 'x402-payment'","prices":[{"id":"a0aa305e-1492-4be7-9b41-00e8d56f4622","listingId":"8bad8df8-47cc-4a38-b0cd-5364a8aa3247","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/2026-03","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:12.494Z"}],"sources":[{"listingId":"8bad8df8-47cc-4a38-b0cd-5364a8aa3247","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2026-03","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:12.494Z","lastSeenAt":"2026-04-22T13:32:02.971Z"}],"details":{"listingId":"8bad8df8-47cc-4a38-b0cd-5364a8aa3247","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2026-03 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns HTTP 402 with x402 challenge requiring 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/2026-03"},{"claim":"Platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 with 6 decimals, so 20000 base units = $0.02","source_url":"https://lowpaymentfee.com/api/v1/backups/2026-03"},{"claim":"Docs, pricing, API, and README pages render only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving archived or backup data for a specific time period (2026-03)","Agent-driven data access with automatic micropayment settlement","Programmatic access to premium resources without managing API keys or subscriptions"],"bestFor":["Agents or scripts that need one-off access to backup/archival data","Developers wanting frictionless pay-per-call API access on Base","Use cases where avoiding API key management and rate limits is valuable"],"notFor":["Users needing detailed documentation or guaranteed SLAs before integrating","High-volume batch retrieval where per-request pricing adds up quickly","Anyone who needs to understand the response schema before paying"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.642Z"},"updatedAt":"2026-04-22T13:32:02.971Z"}}