{"id":"136d4f18-7ea3-47e4-a894-a0fbeace557a","shortId":"LvPesy","kind":"x402","title":"x402-gated backup endpoint on Base, pay-per-call with USDC at $0.02/request.","tagline":"x402-gated backup endpoint on Base, pay-per-call with USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides a pay-per-request \"Premium API Access\" resource at the path /api/v1/backups/45. It is part of a broader platform offering dozens of x402-gated 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 endpoint /api/v1/backups/45 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 maximum amount required is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds.\n\nThe platform advertises no API keys, no rate limits, and instant access. However, documentation beyond the landing page is essentially empty (all doc/pricing/README pages only show a \"Connect wallet\" prompt), so the exact request body schema and response format for this backup endpoint are unknown. The endpoint name suggests it may retrieve or create a backup resource, but this is speculative given the lack of documentation.","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 endpoint","x402 backup","USDC micropayment API","lowpaymentfee","Base network API","premium backup access"],"warnings":["No documentation available — all doc/pricing/README pages show only 'Connect wallet'","Request body schema and response format for /api/v1/backups/45 are completely unknown","The purpose of the 'backups/45' resource is unclear; the name is not self-explanatory","No OpenAPI spec or AI plugin manifest found"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/45","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/45","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and the purpose of /api/v1/backups/45 is unclear. All doc pages return only 'Connect wallet' with no useful 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'/request':16,32 '0.02':15,31,79,136 '000':125 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':148 '0x8335':130 '20':124 '2913':131 '300':153 '6':140 'Base network API' 'USDC micropayment API' 'accept':93 'access':45,166 'address':147 'advertis':157 'ai/ml':69 'amount':121 'analyt':68 'api':44,64,159 'application/json':98 'backup':4,20,196,210 'backup API' 'backup-api' 'base':7,23,87,126,133 'base-network' 'beyond':169 'bodi':189 'broader':56 'call':11,27 'caller':106 'connect':182 'creat':208 'data':67,72 'decim':141 'doc/pricing/readme':177 'document':168,220 'dozen':59 'empti':175 'endpoint':5,21,34,65,91,197,201 'equal':135 'essenti':174 'exact':187 'finance/web3':71 'format':193 'gate':3,19,63 'given':137,216 'handl':101 'header':113 'howev':167 'includ':108 'infer':70 'infrastructur':74 'instant':165 'json-response' 'key':160 'lack':218 'land':171 'limit':163 'lowpaymentfee' 'lowpaymentfee.com':36 'maximum':120 'may':205 'must':107 'name':202 'network':88 'offer':58 'page':172,178 'paid API endpoint' 'part':53 'path':49 'pay':9,25,40 'pay-per-cal':8,24 'pay-per-request':39 'payment':99,112,117,143 'per':10,26,41,80 'platform':57,156 'post':94 'post-method' 'premium':43 'premium backup access' 'price':77 'prompt':184 'proof':118 'protocol':105 'provid':37 'rate':162 'request':42,81,95,188 'requir':122 'resourc':46,211 'respons':192 'retriev':206 'return':97 'schema':190 'second':154 'sent':145 'settl':82 'show':180 'span':66 'specif':90 'specul':215 'suggest':203 'timeout':151 'unit':127 'unknown':199 'usdc':13,29,84,129,138 'usdc-settlement' 'util':75 'valid':116 'via':102 'wallet':183 'x':111 'x-payment':110 'x402':2,18,62,104 'x402 backup' 'x402-gated':1,17,61 'x402-payment'","prices":[{"id":"5e55bc05-fc03-4379-9c46-92d4e885ba4e","listingId":"136d4f18-7ea3-47e4-a894-a0fbeace557a","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/45","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:59:31.652Z"}],"sources":[{"listingId":"136d4f18-7ea3-47e4-a894-a0fbeace557a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/45","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:59:31.652Z","lastSeenAt":"2026-04-22T09:01:56.281Z"}],"details":{"listingId":"136d4f18-7ea3-47e4-a894-a0fbeace557a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/45 \\\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":"The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/backups/45"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/backups/45"},{"claim":"Documentation, pricing, and README pages all render only a 'Connect wallet' prompt with no further content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving or creating backup data via a pay-per-call model without API key management","Integrating automated agents that pay per request using USDC on Base","Accessing premium backup resources with no subscription or rate limits"],"bestFor":["Agents or services that need on-demand backup access with crypto micropayments","Developers wanting keyless, pay-as-you-go API access on Base","Workflows requiring low-friction, per-call payment without subscriptions"],"notFor":["Users who need detailed API documentation or schema validation before integration","High-volume batch operations where $0.02/request adds up significantly","Users without access to USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:26.634Z"},"updatedAt":"2026-04-22T09:01:56.281Z"}}