{"id":"434a799e-da9a-43b2-a380-a42941d0d3cc","shortId":"AJePUz","kind":"x402","title":"x402-gated backup data endpoint on Base, pay $0.02 per request in USDC.","tagline":"x402-gated backup data endpoint on Base, pay $0.02 per request in USDC.","description":"This endpoint at lowpaymentfee.com provides access to a backup dataset for the period 2024-05 via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of API categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request with no API keys, no rate limits, and no commitments required.\n\nThe specific endpoint `/api/v1/backups/2024-05` is labeled \"Premium API Access\" and accepts POST requests. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The x402 challenge confirms the endpoint is live and returns application/json content.\n\nNote that the crawled documentation pages (docs, pricing, README) were essentially empty beyond a \"Connect wallet\" prompt, so details about the backup data's schema, contents, or how to structure the POST body are unknown. The endpoint is not listed on the provider's landing page among the advertised API categories, suggesting it may be a less-prominent or specialized offering. Without further documentation, the exact nature of the backup data and expected request format remain unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","backup-data","json-response","pay-per-request"],"categories":["storage","data"],"synonyms":["backup API","data backup endpoint","2024-05 backup","premium API access","x402 backup","lowpaymentfee backup","paid data export"],"warnings":["No documentation available — docs, pricing, and README pages all render only a 'Connect wallet' prompt with no content.","Request body schema and response format are completely unknown.","This specific endpoint (/api/v1/backups/2024-05) is not listed among the provider's advertised APIs, raising questions about its status.","The nature and contents of the 'backup' data are unspecified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2024-05","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/2024-05","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, but there is no OpenAPI schema, no documentation of request/response formats, and the docs/pricing/README pages are empty. The backup endpoint is not even listed on the provider's landing page. Effectively a stub listing with minimal usable 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'/api/v1/backups/2024-05':98 '0.02':10,24,81,130 '000':125 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':118 '20':124 '2024':42 '2024-05 backup' '6':133 'accept':105 'access':34,103 'advertis':195 'ai':70 'among':193 'amount':122 'analyt':69 'api':65,86,102,196 'application/json':145 'backup':4,18,37,168,217 'backup API' 'backup-data' 'base':8,22,113,126 'base-network' 'beyond':159 'bodi':179 'categori':66,197 'challeng':137 'commit':93 'confirm':138 'connect':161 'content':146,172 'contract':117 'crawl':150 'data':5,19,68,169,218 'data backup endpoint' 'dataset':38 'decim':134 'detail':165 'doc':153 'document':151,211 'empti':158 'endpoint':6,20,30,54,97,140,183 'equal':129 'essenti':157 'exact':213 'expect':220 'financ':73 'format':222 'gate':3,17 'host':61 'includ':67 'infrastructur':76 'json-response' 'key':87 'label':100 'land':191 'learn':72 'less':204 'less-promin':203 'limit':90 'list':186 'live':142 'lowpaymentfee backup' 'lowpaymentfee.com':32,58 'machin':71 'mani':53 'maximum':121 'may':200 'natur':214 'network':114 'note':147 'offer':55,208 'one':51 'page':152,192 'paid data export' 'pay':9,23 'pay-per-request' 'payment':47,108 'per':11,25,82 'period':41 'platform':59 'post':106,178 'premium':101 'premium API access' 'price':79,154 'promin':205 'prompt':163 'protocol':48 'provid':33,189 'rate':89 'readm':155 'remain':223 'request':12,26,83,107,221 'requir':94 'return':144 'schema':171 'settl':110 'special':207 'specif':96 'structur':176 'suggest':198 'unclear':224 'unit':127 'unknown':181 'usdc':14,28,116,131 'usdc-settlement' 'use':115,132 'util':77 'varieti':63 'via':44 'wallet':162 'web3':74 'without':209 'x402':2,16,46,136 'x402 backup' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"344279bb-a7ce-41f5-8052-57371e04a1b6","listingId":"434a799e-da9a-43b2-a380-a42941d0d3cc","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/2024-05","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:54.015Z"}],"sources":[{"listingId":"434a799e-da9a-43b2-a380-a42941d0d3cc","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2024-05","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:54.015Z","lastSeenAt":"2026-04-22T15:02:33.701Z"}],"details":{"listingId":"434a799e-da9a-43b2-a380-a42941d0d3cc","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2024-05 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/backups/2024-05"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/2024-05"},{"claim":"Documentation pages (docs, pricing, README) contain only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving archived backup data for the May 2024 period","Agent-driven programmatic access to backup datasets with per-request micropayments","Integrating backup retrieval into automated workflows without API key management"],"bestFor":["Agents needing on-demand access to backup data without subscription commitments","Developers who want keyless, pay-per-call access to archived datasets","x402-compatible clients on the Base network"],"notFor":["Users who need detailed documentation or schema definitions before integrating","High-volume bulk data retrieval where per-request pricing may add up","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.89Z"},"updatedAt":"2026-04-22T15:02:33.701Z"}}