{"id":"e36d064c-c5ca-48ad-9b5e-5a1106e5c9b4","shortId":"QjGQw8","kind":"x402","title":"Download 2025-07 backup data via x402 micropayment on Base (USDC, $0.02/request).","tagline":"Download 2025-07 backup data via x402 micropayment on Base (USDC, $0.02/request).","description":"This endpoint at lowpaymentfee.com provides downloadable backup data for the 2025-07 period, gated behind an x402 micropayment. The endpoint accepts POST requests and returns application/json content. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.\n\nThe provider, lowpaymentfee.com, hosts a broader suite of x402-gated APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all priced uniformly at $0.02 per request. This specific endpoint (/api/v1/backups/2025-07/download) appears to serve a backup archive for July 2025. However, the crawled documentation pages (docs, pricing, README) returned only a \"Connect wallet\" prompt with no further detail, so the exact schema of the backup payload, its contents, and any input parameters remain undocumented.\n\nThe endpoint is confirmed live: the probe received a proper HTTP 402 challenge with x402 version 1, scheme \"exact\", and a 300-second payment timeout. The landing page at the origin root returned HTTP 200 with a full listing of available APIs. Because documentation is essentially absent beyond the landing page summary, users should expect to experiment with the endpoint to understand the response format.","tags":[],"capabilities":["x402-payment","usdc-base","backup-download","micropayment","no-api-key","pay-per-request"],"categories":["storage","data"],"synonyms":["backup download API","data export","x402 backup","Base USDC API","micropayment data download","lowpaymentfee backup","paid backup endpoint"],"warnings":["Documentation pages (/docs, /pricing, /README, /api) all returned only 'Connect wallet' with no usable content.","No OpenAPI schema, no response examples, and no description of what the backup data actually contains.","The endpoint path references '2025-07' — it may be time-scoped and could become stale or return empty data outside that period.","The exact request body schema (if any) is undocumented; callers will need to experiment."],"endpointUrl":"https://lowpaymentfee.com/api/v1/backups/2025-07/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/2025-07/download","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, but documentation is essentially nonexistent — all doc/pricing/README pages returned only 'Connect wallet'. The backup endpoint's response schema, input parameters, and actual data contents are completely unknown. Pricing is clear ($0.02 USDC on Base) but everything else must be 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'/api/v1/backups/2025-07/download':135 '/request':13,26 '0.02':12,25,69,129 '000':73 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':64 '1':195 '20':72 '200':213 '2025':2,15,37,144 '300':200 '402':190 '6':77 'Base USDC API' 'absent':225 'accept':47 'ai/ml':118 'analyt':117 'api':80,114,220 'appear':136 'application/json':52 'archiv':141 'attach':91 'avail':219 'backup':4,17,33,140,169 'backup download API' 'backup-download' 'base':10,23,59,74 'behind':41 'beyond':226 'broader':108 'caller':89 'challeng':191 'commit':86 'confirm':182 'connect':156 'content':53,172 'contract':63 'cost':67 'crawl':147 'data':5,18,34,116,121 'data export' 'decim':78 'detail':162 'doc':150 'document':148,222 'download':1,14,32 'endpoint':28,46,134,180,238 'essenti':224 'exact':165,197 'expect':233 'experi':235 'finance/web3':120 'format':243 'full':216 'gate':40,113 'header':96 'host':106 'howev':145 'http':189,212 'infer':119 'infrastructur':123 'input':175 'juli':143 'key':81 'land':205,228 'limit':83 'list':217 'live':183 'lowpaymentfee backup' 'lowpaymentfee.com':30,105 'micropay':8,21,44 'micropayment' 'micropayment data download' 'network':60 'no-api-key' 'origin':209 'page':149,206,229 'paid backup endpoint' 'paramet':176 'pay-per-request' 'payload':170 'payment':54,95,101,202 'per':70,130 'period':39 'post':48 'price':126,151 'probe':185 'prompt':158 'proof':102 'proper':188 'provid':31,104 'rate':82 'readm':152 'receiv':186 'remain':177 'request':49,71,131 'requir':88 'respons':242 'return':51,153,211 'root':210 'schema':166 'scheme':196 'second':201 'serv':138 'settl':56 'simpli':90 'span':115 'specif':133 'suit':109 'summari':230 'timeout':203 'understand':240 'undocu':178 'uniform':127 'unit':75 'upfront':85 'usdc':11,24,62 'usdc-base' 'use':61 'user':231 'util':124 'valid':99 'version':194 'via':6,19 'wallet':157 'x':94 'x-payment':93 'x402':7,20,43,100,112,193 'x402 backup' 'x402-gated':111 'x402-payment'","prices":[{"id":"0aa0f235-afd4-4a28-b7df-a59ef20693f3","listingId":"e36d064c-c5ca-48ad-9b5e-5a1106e5c9b4","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/2025-07/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":"2026-04-18T19:29:57.029Z"}],"sources":[{"listingId":"e36d064c-c5ca-48ad-9b5e-5a1106e5c9b4","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/backups/2025-07/download","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T19:29:57.029Z","lastSeenAt":"2026-04-22T15:02:33.882Z"}],"details":{"listingId":"e36d064c-c5ca-48ad-9b5e-5a1106e5c9b4","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/backups/2025-07/download \\\n  -H \"X-PAYMENT: <x402-payment-proof>\" \\\n  -H \"Content-Type: application/json\"","exampleRequest":{"url":"https://lowpaymentfee.com/api/v1/backups/2025-07/download","method":"POST","headers":{"X-PAYMENT":"<x402-payment-proof>","Content-Type":"application/json"}},"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint returns HTTP 402 with x402 version 1 challenge, scheme 'exact', on Base network using USDC","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-07/download"},{"claim":"maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02 per request","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-07/download"},{"claim":"Provider advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/backups/2025-07/download"}],"useCases":["Downloading July 2025 backup archives via a single micropayment","Programmatic retrieval of backup data without API key registration","Agent-driven data acquisition using x402 payment protocol on Base"],"bestFor":["Agents or scripts that need on-demand backup data without account setup","Developers experimenting with x402 micropayment-gated endpoints","Automated workflows requiring pay-per-use data downloads on Base"],"notFor":["Users needing detailed API documentation or guaranteed response schemas","Bulk backup retrieval where per-request fees would accumulate significantly","Anyone without a Base-network USDC wallet or x402-compatible client"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:27.766Z"},"updatedAt":"2026-04-22T15:02:33.882Z"}}