{"id":"8fbe3264-0718-4ca5-adc2-1c9ea153fa40","shortId":"MYP6hS","kind":"x402","title":"x402-gated backup/data endpoint on Base, pay-per-request with USDC at $0.02/call.","tagline":"x402-gated backup/data endpoint on Base, pay-per-request with USDC at $0.02/call.","description":"This endpoint at lowpaymentfee.com provides a \"Premium API Access\" resource at the path `/api/v1/backups/2025-10`, gated behind the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum amount of 20,000 base units, which equals $0.02 USD (USDC uses 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe broader lowpaymentfee.com platform advertises a suite of x402-gated APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/Web3 data (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 the same pay-per-use model on Base.\n\nThe specific endpoint being listed here (`/api/v1/backups/2025-10`) appears to serve backup data for October 2025. Documentation beyond the landing page is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the backup data contains or what POST body is expected.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-request","backup-data","json-response","no-api-key"],"categories":["storage","data"],"synonyms":["x402 backup API","pay-per-call data endpoint","USDC gated API","Base network API","lowpaymentfee backup","micropayment API","crypto-paid data export"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","No OpenAPI or request/response schema provided; the expected POST body and response format are unknown.","The purpose and contents of '/api/v1/backups/2025-10' are not described anywhere in the crawled material.","The broader platform lists many endpoints but none have documented schemas or examples."],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2025-10","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/2025-10","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 402 challenge, confirming it is operational. However, there is no OpenAPI schema, no request/response examples, and the docs pages are empty beyond a wallet-connect prompt. The purpose of the specific backup endpoint is unclear, and no input schema is documented. This is effectively a stub 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'/call':16,32 '0.02':15,31,83,155 '000':78 '0x8335':70 '20':77 '2025':182 '2913':71 '6':87 'Base network API' 'USDC gated API' 'accept':54 'access':41 'advertis':115 'ai/ml':126 'amount':75 'analysi':129 'analyt':125 'api':40,90,122,193 'appear':175 'attach':99 'backup':178,224 'backup-data' 'backup/data':4,20 'base':7,23,65,79,167 'behind':48 'beyond':184 'bodi':230 'broader':112 'caller':97 'classif':131 'connect':202 'contain':226 'content':208 'contract':69 'convers':148 'crypto-paid data export' 'data':124,134,179,225 'decim':88 'descript':220 'detail':219 'doc':192 'document':183 'embed':132 'endpoint':5,21,34,151,170 'equal':82 'estim':142 'exampl':216 'exchang':137 'expect':232 'extrem':189 'feed':136 'finance/web3':133 'gas':141 'gate':3,19,47,121 'generat':149 'geocod':146 'header':104 'infer':127 'infrastructur':144 'json':59 'json-response' 'key':91 'land':186 'limit':94 'list':153,172 'lowpaymentfee backup' 'lowpaymentfee.com':36,113 'maximum':74 'micropayment API' 'model':165 'network':66 'no-api-key' 'octob':181 'openapi':212 'page':187,197 'path':45 'pay':9,25,162 'pay-per-call data endpoint' 'pay-per-request':8,24 'pay-per-us':161 'payment':51,60,103,109 'per':10,26,156,163 'platform':114 'post':55,229 'premium':39 'price':135,194 'prompt':204 'proof':110 'protocol':52 'provid':37 'quot':140 'rate':93,138 'readm':196 'render':199 'request':11,27,56,157 'request/response':215 'requir':96 'resourc':42 'return':58 'schema':213 'sentiment':128 'serv':177 'settl':62 'simpli':98 'span':123 'spars':190 'specif':169 'suit':117 'summar':130 'token':139 'unit':80 'usd':84 'usdc':13,29,68,85 'usdc-base' 'use':67,86,164 'util':145 'valid':107,147 'wallet':203 'x':102 'x-payment':101 'x402':2,18,50,108,120 'x402 backup API' 'x402-gated':1,17,119 'x402-payment'","prices":[{"id":"cacafaf0-89ac-4429-95f1-a396bf33e5c3","listingId":"8fbe3264-0718-4ca5-adc2-1c9ea153fa40","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/2025-10","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:15.512Z"}],"sources":[{"listingId":"8fbe3264-0718-4ca5-adc2-1c9ea153fa40","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2025-10","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:15.512Z","lastSeenAt":"2026-04-22T13:32:03.117Z"}],"details":{"listingId":"8fbe3264-0718-4ca5-adc2-1c9ea153fa40","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2025-10 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-proof>\"","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, confirming it is live","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-10"},{"claim":"Payment is 20,000 base units of USDC on Base (USD Coin, contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-10"},{"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":"Docs, API, pricing, and README pages render only 'Connect wallet' with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving backup data snapshots for October 2025 via a single paid request","Programmatic access to archived data without subscription or API key management","Agent-driven data retrieval with automatic USDC micropayment on Base"],"bestFor":["Developers wanting keyless, pay-per-use data access on Base","AI agents that can settle x402 payments autonomously","Users who need one-off backup data retrieval without committing to a subscription"],"notFor":["Users who need detailed API documentation or request/response schemas before integrating","High-volume consumers who would benefit from bulk pricing or subscriptions","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.51Z"},"updatedAt":"2026-04-22T13:32:03.117Z"}}