{"id":"f32398bc-fd4d-4700-921d-c094732ad2ba","shortId":"6EgjSq","kind":"x402","title":"Download April 2024 backup data via x402 micropayment on Base for $0.02 per request.","tagline":"Download April 2024 backup data via x402 micropayment on Base for $0.02 per request.","description":"This endpoint at lowpaymentfee.com provides access to a downloadable backup file from April 2024 via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of data, analytics, AI/ML, finance, and utility APIs — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/backups/2024-04/download` accepts POST requests and returns `application/json` content. Payment is handled inline via the x402 protocol: callers must include an `X-PAYMENT` header with a valid payment proof. The x402 challenge confirms the endpoint is live, requesting a maximum of 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\nDocumentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema documentation, and no description of what the backup data actually contains. The endpoint's purpose (\"backups/2024-04/download\") suggests it serves archived or historical data from April 2024, but the exact payload structure and content are unknown.","tags":[],"capabilities":["x402-payment","usdc-base","backup-download","micropayment","post-endpoint","json-response"],"categories":["storage","data"],"synonyms":["backup download API","data export","archive download","April 2024 backup","x402 data endpoint","lowpaymentfee backup","USDC micropayment API"],"warnings":["No OpenAPI or schema documentation available — request and response formats are unknown","Docs, API, pricing, and README pages all return only a 'Connect wallet' prompt with no useful content","The nature and contents of the 'April 2024 backup' are completely undocumented","No examples of request body or response payload available"],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2024-04/download","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/2024-04/download","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no description of what the backup data actually contains. This is effectively a stub 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'0.02':12,26,74,141 '000':130 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':153 '0x8335':135 '20':129 '2024':3,17,42,219 '2913':136 '300':158 '6':145 'April 2024 backup' 'USDC micropayment API' 'accept':89 'access':34 'actual':203 'addit':183 'address':152 'ai/ml':66 'analyt':65 'api':70,169 'application/json':94 'april':2,16,41,218 'archiv':213 'archive download' 'backup':4,18,38,201 'backup download API' 'backup-download' 'backups/2024-04/download':209 'base':10,24,83,131,138 'caller':104 'challeng':119 'confirm':120 'connect':178 'contain':204 'content':95,226 'data':5,19,64,202,216 'data export' 'decim':146 'descript':197 'detail':185 'doc':168 'document':160,194 'download':1,15,37 'endpoint':30,53,87,122,206 'equal':140 'exact':222 'extrem':165 'file':39 'financ':67 'given':142 'handl':98 'header':111 'histor':215 'host':60 'includ':106 'inlin':99 'json-response' 'live':124 'lowpaymentfee backup' 'lowpaymentfee.com':32,57 'mani':52 'maximum':127 'micropay':8,22 'micropayment' 'must':105 'network':84 'offer':54 'one':50 'openapi':189 'page':173 'payload':223 'payment':46,96,110,115,148 'per':13,27,75 'platform':58 'post':90 'post-endpoint' 'price':72,170 'prompt':180 'proof':116 'protocol':47,103 'provid':33 'purpos':208 'readm':172 'render':175 'request':14,28,76,91,125 'request/response':192 'return':93 'schema':193 'second':159 'sent':150 'serv':212 'settl':78 'site':163 'spars':166 'spec':190 'specif':86 'structur':224 'suggest':210 'technic':184 'timeout':156 'unit':132 'unknown':228 'usdc':80,134,143 'usdc-base' 'util':69 'valid':114 'varieti':62 'via':6,20,43,100 'wallet':179 'x':109 'x-payment':108 'x402':7,21,45,102,118 'x402 data endpoint' 'x402-payment'","prices":[{"id":"4dd320df-bcfb-43eb-9fb2-68c8244381f5","listingId":"f32398bc-fd4d-4700-921d-c094732ad2ba","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/2024-04/download","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T19:29:50.453Z"}],"sources":[{"listingId":"f32398bc-fd4d-4700-921d-c094732ad2ba","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2024-04/download","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:50.453Z","lastSeenAt":"2026-04-22T16:32:25.980Z"}],"details":{"listingId":"f32398bc-fd4d-4700-921d-c094732ad2ba","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2024-04/download \\\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 requesting 20,000 base units of USDC on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), equaling $0.02","source_url":"https://lowpaymentfee.com/api/v1/backups/2024-04/download"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on the Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout","source_url":"https://lowpaymentfee.com/api/v1/backups/2024-04/download"},{"claim":"Docs, API, pricing, and README pages render only a 'Connect wallet' prompt","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Downloading archived backup data from April 2024","Programmatic retrieval of historical data snapshots","Agent-driven data acquisition with per-request micropayments"],"bestFor":["Agents needing historical backup data from April 2024","Developers exploring x402 micropayment-gated data endpoints","Automated workflows that fetch archived datasets"],"notFor":["Users needing real-time or streaming data","Anyone requiring detailed API documentation or schema guarantees before purchasing","Bulk data retrieval where per-request pricing is inefficient"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:28.138Z"},"updatedAt":"2026-04-22T16:32:25.980Z"}}