{"id":"537ac9ff-a278-40b6-b2f5-d7c52e168877","shortId":"NNLppX","kind":"x402","title":"x402-gated backup endpoint on Base, paid per-request in USDC at $0.02.","tagline":"x402-gated backup endpoint on Base, paid per-request in USDC at $0.02.","description":"This endpoint at lowpaymentfee.com provides access to a backup resource at the path `/api/v1/backups/2026-07`. It is part of a broader platform that offers dozens of x402-protocol pay-per-call APIs 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/2026-07` endpoint accepts POST requests and returns `application/json`. Payment is handled via the x402 protocol: callers must include an `X-PAYMENT` header with a valid payment proof. The challenge advertises a `maxAmountRequired` of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment scheme is \"exact\" with a 300-second timeout.\n\nThe platform advertises no API keys, no rate limits, and instant access. However, documentation 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 spec, no request/response schema documentation, and no explanation of what the backup resource actually contains or what POST body it expects. The endpoint is live (returns a proper 402 challenge), but without documentation it is difficult to know what data is returned or what input is required.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","backup-data"],"categories":["storage","infrastructure"],"synonyms":["backup API","data backup endpoint","x402 backup","USDC pay-per-call","lowpaymentfee","Base network API","crypto-paid API"],"warnings":["No API documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.","No request body schema or response schema documented; unclear what data this endpoint returns.","The meaning of 'backups/2026-07' is not explained anywhere in the crawled material.","No OpenAPI or ai-plugin manifest found."],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2026-07","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/2026-07","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 pricing and payment details. However, there is no OpenAPI spec, no documented request/response schema, no examples, and the docs pages are empty stubs. The purpose of the 'backups/2026-07' resource is unexplained, making this effectively a stub 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'0.02':15,30,77,135 '000':124 '0x8335':129 '20':123 '2913':130 '300':148 '402':218 '6':139 'Base network API' 'USDC pay-per-call' 'accept':91 'access':36,162 'actual':203 'advertis':119,153 'ai/ml':67 'analyt':66 'api':63,155,171 'application/json':96 'backup':4,19,39,201 'backup API' 'backup-data' 'base':7,22,85,125,132 'base-network' 'bodi':208 'broader':50 'call':62 'caller':104 'challeng':118,219 'connect':179 'contain':204 'content':185 'crypto-paid API' 'data':65,70,229 'data backup endpoint' 'decim':140 'difficult':225 'doc':169 'document':164,194,222 'dozen':54 'endpoint':5,20,32,90,212 'equal':134 'exact':145 'expect':210 'explan':197 'extrem':166 'finance/web3':69 'gate':3,18 'given':136 'handl':99 'header':111 'howev':163 'includ':106 'infer':68 'infrastructur':72 'input':234 'instant':161 'json-response' 'key':156 'know':227 'limit':159 'live':214 'lowpaymentfee' 'lowpaymentfee.com':34 'maxamountrequir':121 'must':105 'network':86 'offer':53 'openapi':189 'page':174 'paid':8,23 'part':47 'path':43 'pay':60 'pay-per-cal':59 'pay-per-request' 'payment':97,110,115,142 'per':10,25,61,78 'per-request':9,24 'platform':51,152 'post':92,207 'price':75,170 'prompt':181 'proof':116 'proper':217 'protocol':58,103 'provid':35 'rate':158 'readm':173 'render':176 'request':11,26,79,93 'request/response':192 'requir':236 'resourc':40,202 'return':95,215,231 'schema':193 'scheme':143 'second':149 'settl':80 'span':64 'spec':190 'specif':88 'substant':184 'thin':167 'timeout':150 'unit':126 'usdc':13,28,82,128,137 'usdc-settlement' 'util':73 'valid':114 'via':100 'wallet':180 'without':221 'x':109 'x-payment':108 'x402':2,17,57,102 'x402 backup' 'x402-gated':1,16 'x402-payment' 'x402-protocol':56","prices":[{"id":"e0913f16-964a-459e-98b6-6e35347f8b93","listingId":"537ac9ff-a278-40b6-b2f5-d7c52e168877","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/2026-07","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":"537ac9ff-a278-40b6-b2f5-d7c52e168877","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2026-07","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":"537ac9ff-a278-40b6-b2f5-d7c52e168877","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2026-07 \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\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 maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/backups/2026-07"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/backups/2026-07"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving backup data for the 2026-07 period via a single paid API call","Programmatic access to backup archives without API key management","Agent-driven data retrieval with on-chain USDC micropayments"],"bestFor":["Developers who want key-less, pay-per-call backup access","AI agents with x402 payment capability on Base","Users needing one-off backup retrieval without subscriptions"],"notFor":["Users who need detailed API documentation before integrating","High-volume bulk backup operations where per-request pricing adds up","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.643Z"},"updatedAt":"2026-04-22T13:32:03.043Z"}}