{"id":"f372b179-df56-41a1-b982-59c1ee934884","shortId":"SkDfsL","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 resource dated 2023-02 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.\n\nThe specific endpoint `/api/v1/backups/2023-02` is labeled \"Premium API Access\" and accepts POST requests. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) via the x402 exact-payment scheme. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 USD per call. The payment is directed to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds.\n\nDocumentation is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no further content. The exact nature of the backup data returned by this endpoint is unclear; the description simply says \"Premium API Access\" without specifying the data format or contents. The endpoint is confirmed live via a valid 402 challenge, but without documentation or example responses, the actual utility of this specific backup endpoint remains uncertain.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","backup-data","post-request","no-api-key","pay-per-request"],"categories":["storage","data"],"synonyms":["backup API","data backup endpoint","x402 backup","lowpaymentfee backup","premium API access","USDC pay-per-call","Base network API"],"warnings":["Documentation pages (/docs, /api, /pricing, /README) all render only 'Connect wallet' with no usable content.","The exact contents and schema of the backup data returned by this endpoint are unknown.","No OpenAPI spec or output schema is provided beyond the basic x402 challenge metadata.","The purpose of a 'backups/2023-02' endpoint is unclear — it may be test/demo data."],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2023-02","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/2023-02","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live with a valid x402 402 challenge and clear pricing ($0.02 USDC on Base). However, documentation is effectively absent — all doc pages show only 'Connect wallet'. There is no OpenAPI schema, no example request/response, and no description of what the backup data actually contains. The listing is largely a 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'/api/v1/backups/2023-02':95 '0.02':10,24,79,138 '000':129 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':148 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':115 '20':128 '2023':40 '300':153 '402':212 '6':134 'Base network API' 'USDC pay-per-call' 'accept':102 'access':34,100,196 'actual':221 'address':147 'ai':68 'amount':125 'analyt':67 'api':63,84,99,161,195 'backup':4,18,37,182,226 'backup API' 'backup-data' 'base':8,22,110,130 'base-network' 'call':141 'categori':64 'challeng':213 'commit':91 'confirm':207 'connect':170 'content':176,203 'contract':114 'data':5,19,66,183,200 'data backup endpoint' 'date':39 'decim':135 'descript':191 'direct':145 'doc':160 'document':155,216 'endpoint':6,20,30,52,94,187,205,227 'equal':137 'exact':120,178 'exact-pay':119 'exampl':218 'extrem':157 'financ':71 'format':201 'gate':3,17 'host':59 'includ':65 'infrastructur':74 'key':85 'label':97 'learn':70 'limit':88 'live':208 'lowpaymentfee backup' 'lowpaymentfee.com':32,56 'machin':69 'mani':51 'maximum':124 'natur':179 'network':111 'no-api-key' 'offer':53 'one':49 'page':165 'pay':9,23 'pay-per-request' 'payment':45,105,121,143 'per':11,25,80,140 'platform':57 'post':103 'post-request' 'premium':98,194 'premium API access' 'price':77,162 'prompt':172 'protocol':46 'provid':33 'rate':87 'readm':164 'remain':228 'render':167 'request':12,26,81,104 'requir':126 'resourc':38 'respons':219 'return':184 'say':193 'scheme':122 'second':154 'settl':107 'simpli':192 'spars':158 'specif':93,225 'specifi':198 'timeout':151 'uncertain':229 'unclear':189 'unit':131 'usd':139 'usdc':14,28,113,133 'usdc-settlement' 'use':112 'util':75,222 'valid':211 'varieti':61 'via':42,116,209 'wallet':171 'web3':72 'without':197,215 'x402':2,16,44,118 'x402 backup' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"bbb418d4-a1a6-464b-a728-5e5f377578df","listingId":"f372b179-df56-41a1-b982-59c1ee934884","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/2023-02","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:52.847Z"}],"sources":[{"listingId":"f372b179-df56-41a1-b982-59c1ee934884","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2023-02","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:52.847Z","lastSeenAt":"2026-04-22T15:02:33.678Z"}],"details":{"listingId":"f372b179-df56-41a1-b982-59c1ee934884","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2023-02 \\\n  -H \"X-PAYMENT: <x402-payment-token>\" \\\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 valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network.","source_url":"https://lowpaymentfee.com/api/v1/backups/2023-02"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base.","source_url":"https://lowpaymentfee.com/api/v1/backups/2023-02"},{"claim":"Documentation, API, pricing, and README pages all render only a 'Connect wallet' prompt.","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving archived backup data from February 2023","Programmatic access to backup resources without API key management","Agent-driven data retrieval with per-call USDC micropayments"],"bestFor":["Agents needing on-demand backup data access with crypto micropayments","Developers who want keyless API access settled on Base","Use cases requiring no rate limits or subscription commitments"],"notFor":["Users who need detailed documentation or schema guarantees before integrating","Anyone without a Base-compatible USDC wallet","High-frequency bulk data retrieval where $0.02/call adds up significantly"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:28.012Z"},"updatedAt":"2026-04-22T15:02:33.678Z"}}