{"id":"82d8d670-742b-4b3a-a3e0-70cef47fcac4","shortId":"vjYEUF","kind":"x402","title":"x402-gated backup/data endpoint on Base, pay-per-call with USDC at $0.02 per request.","tagline":"x402-gated backup/data endpoint on Base, pay-per-call with USDC at $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides a \"Premium API Access\" resource at the path `/api/v1/backups/7`. It is part of a broader platform offering dozens of pay-per-request API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all gated via the x402 payment protocol on the Base network, settled in USDC.\n\nThe specific `/api/v1/backups/7` endpoint accepts POST requests and returns `application/json`. The x402 challenge advertises a maximum amount of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each call. The payment timeout is 300 seconds.\n\nDocumentation is extremely sparse. The docs, pricing, API, and README pages all render only a \"Connect wallet\" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the `/api/v1/backups/7` endpoint actually returns. The endpoint name suggests it retrieves or creates a backup resource (item 7), but the actual payload structure is unknown. The platform lists many other endpoints at the same $0.02 price point, but none have documented schemas either.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","post-method","backup-api"],"categories":["storage","infrastructure"],"synonyms":["backup API","paid API","x402 endpoint","USDC micropayment API","lowpaymentfee","Base network API","per-request payment API"],"warnings":["No OpenAPI or schema documentation available — request and response formats are completely unknown","All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no content","The specific purpose of /api/v1/backups/7 is unclear; 'Premium API Access' is a generic label used across the platform","No examples or error handling documentation available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/7","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/7","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 captured) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on request/response schemas, no OpenAPI spec, and the docs pages are empty. The purpose of '/api/v1/backups/7' is unclear beyond its name. Effectively a stub 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'0.02':15,32,119,224 '000':108 '0x8335':113 '20':107 '2913':114 '300':152 '6':124 '7':207 'Base network API' 'USDC micropayment API' 'accept':93 'access':43,137 'actual':193,210 'advertis':102,128 'ai/ml':68 'amount':105 'analyt':67 'api':42,63,130,161 'application/json':98 'attach':140 'backup':204 'backup API' 'backup-api' 'backup/data':4,21 'base':7,24,84,109,116 'base-network' 'broader':54 'call':11,28,147 'challeng':101 'connect':169 'content':175 'creat':202 'data':66,71 'decim':125 'doc':159 'document':154,184,230 'dozen':57 'either':232 'endpoint':5,22,36,64,92,192,196,220 'equal':118 'exampl':187 'extrem':156 'finance/web3':70 'gate':3,20,76 'header':144 'infer':69 'infrastructur':73 'instant':136 'item':206 'json-response' 'key':131 'limit':134 'list':217 'lowpaymentfee' 'lowpaymentfee.com':38 'mani':218 'maximum':104 'name':197 'network':85 'none':228 'offer':56 'openapi':179 'page':164 'paid API' 'part':51 'path':47 'pay':9,26,60 'pay-per-cal':8,25 'pay-per-request':59 'payload':211 'payment':80,143,149 'per':10,16,27,33,61,120 'per-request payment API' 'platform':55,127,216 'point':226 'post':94 'post-method' 'premium':41 'price':160,225 'prompt':171 'protocol':81 'provid':39 'rate':133 'readm':163 'render':166 'request':17,34,62,95,121 'request/response':182 'resourc':44,205 'retriev':200 'return':97,194 'schema':183,231 'second':153 'settl':86 'simpli':139 'span':65 'spars':157 'spec':180 'specif':90 'structur':212 'suggest':198 'timeout':150 'unit':110 'unknown':214 'usdc':13,30,88,112,122 'usdc-settlement' 'use':123 'util':74 'via':77 'wallet':170 'x402':2,19,79,100,142 'x402 endpoint' 'x402-gated':1,18 'x402-payment'","prices":[{"id":"06b36089-1217-4aa3-bd8a-111c2bb9d277","listingId":"82d8d670-742b-4b3a-a3e0-70cef47fcac4","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/7","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:28.051Z"}],"sources":[{"listingId":"82d8d670-742b-4b3a-a3e0-70cef47fcac4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/7","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:28.051Z","lastSeenAt":"2026-04-22T10:02:39.245Z"}],"details":{"listingId":"82d8d670-742b-4b3a-a3e0-70cef47fcac4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/7 \\\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":"The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/backups/7"},{"claim":"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 address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/7"},{"claim":"Platform offers endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving or creating backup data via a single pay-per-call request","Agent-driven data access without API key provisioning","Programmatic USDC micropayment for on-demand API resources"],"bestFor":["Developers wanting keyless, pay-per-use API access on Base","AI agents that can settle x402 payments in USDC","Quick one-off data retrieval without subscription commitments"],"notFor":["Users needing detailed API documentation or guaranteed SLAs","High-volume batch operations where per-request pricing adds up","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:26.883Z"},"updatedAt":"2026-04-22T10:02:39.245Z"}}