{"id":"841f698b-fd98-497d-bc47-7aea8759c099","shortId":"Nkk9Mw","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/11`. 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.\n\nThe specific endpoint `/api/v1/backups/11` accepts POST requests and returns `application/json`. Payment is settled in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base) using the x402 \"exact\" scheme. The maximum amount required is 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals). The payment recipient address is `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, and the payment timeout is 300 seconds.\n\nThe platform advertises a uniform $0.02 per request pricing model across all its endpoints, with no API keys, no rate limits, and no minimum commitments. However, documentation beyond the landing page is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. The exact functionality of the `/api/v1/backups/11` endpoint is unclear; the name suggests it may return or create a backup resource, but no schema, example payloads, or detailed documentation are available to confirm this.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","post-method","backup-api"],"categories":["storage","infrastructure"],"synonyms":["backup API","data backup endpoint","x402 API","USDC micropayment API","Base network API","pay-per-call backup","lowpaymentfee"],"warnings":["No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.","The exact purpose and behavior of /api/v1/backups/11 is unknown; 'Premium API Access' is a generic label used across the platform.","No OpenAPI spec, no request/response examples, and no output schema beyond basic HTTP metadata.","No robots.txt or agents.txt found on the origin."],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/11","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/11","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 documentation, no request/response schema, and no explanation of what '/api/v1/backups/11' actually does. The docs, pricing, and README pages are all empty beyond a wallet-connect prompt. This is effectively a stub 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'0.02':15,32,123,146 '000':116 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':133 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':102 '20':115 '300':139 '6':126 'Base network API' 'USDC micropayment API' 'accept':90 'access':43 'across':151 'address':131 'advertis':143 'ai/ml':68 'amount':112 'analyt':67 'api':42,63,157,177 'application/json':95 'avail':222 'backup':211 'backup API' 'backup-api' 'backup/data':4,21 'base':7,24,84,104,117 'base-network' 'beyond':168 'broader':54 'call':11,28 'commit':165 'confirm':224 'connect':186 'content':192 'contract':101 'creat':209 'data':66,71 'data backup endpoint' 'decim':127 'detail':219 'doc':176 'document':167,220 'dozen':57 'endpoint':5,22,36,64,88,154,199 'equal':122 'exact':108,194 'exampl':216 'extrem':173 'finance/web3':70 'function':195 'gate':3,20,76 'howev':166 'infer':69 'infrastructur':73 'json-response' 'key':158 'land':170 'limit':161 'lowpaymentfee' 'lowpaymentfee.com':38 'maximum':111 'may':206 'minimum':164 'model':150 'name':203 'network':85 'offer':56 'page':171,181 'part':51 'path':47 'pay':9,26,60 'pay-per-cal':8,25 'pay-per-call backup' 'pay-per-request':59 'payload':217 'payment':80,96,129,136 'per':10,16,27,33,61,147 'platform':55,142 'post':91 'post-method' 'premium':41 'price':149,178 'prompt':188 'protocol':81 'provid':39 'rate':160 'readm':180 'recipi':130 'render':183 'request':17,34,62,92,148 'requir':113 'resourc':44,212 'return':94,207 'schema':215 'scheme':109 'second':140 'settl':98 'span':65 'spars':174 'specif':87 'substant':191 'suggest':204 'timeout':137 'unclear':201 'uniform':145 'unit':118 'usdc':13,30,100,120,124 'usdc-settlement' 'use':105,125 'util':74 'via':77 'wallet':187 'x402':2,19,79,107 'x402 API' 'x402-gated':1,18 'x402-payment'","prices":[{"id":"30df8b01-e0fb-44e3-bf6f-1e91bf553567","listingId":"841f698b-fd98-497d-bc47-7aea8759c099","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/11","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:49.238Z"}],"sources":[{"listingId":"841f698b-fd98-497d-bc47-7aea8759c099","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/11","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:49.238Z","lastSeenAt":"2026-04-22T16:32:25.919Z"}],"details":{"listingId":"841f698b-fd98-497d-bc47-7aea8759c099","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/11 \\\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","source_url":"https://lowpaymentfee.com/api/v1/backups/11"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/backups/11"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving or creating data backups via a pay-per-request model","Integrating x402 payment-gated API calls into agent workflows","Accessing premium data resources without API key management"],"bestFor":["Developers experimenting with x402 payment protocol on Base","Agents needing keyless, pay-per-call API access","Low-volume or sporadic backup data retrieval"],"notFor":["High-volume backup operations where $0.02/request adds up quickly","Users who need detailed API documentation or guaranteed SLAs","Anyone requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:28.227Z"},"updatedAt":"2026-04-22T16:32:25.919Z"}}