{"id":"c0af95ca-d3ea-41b2-93fb-9cee340edaaa","shortId":"LTf4Fu","kind":"x402","title":"x402-gated user data export endpoint on Base, paid per-request in USDC.","tagline":"x402-gated user data export endpoint on Base, paid per-request in USDC.","description":"This endpoint at lowpaymentfee.com provides a \"Premium API Access\" user export capability via HTTP POST, gated behind the x402 payment protocol. The endpoint returns a 402 challenge requiring payment in USDC on the Base network. The maximum amount required per request is 20,000 units of the USDC token (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913), with a timeout of 300 seconds.\n\nThe hosting site lowpaymentfee.com advertises a broad catalog of x402-payable APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities, all priced at $0.02 per request with no API keys, no rate limits, and instant access. However, this specific endpoint (/api/v2/users/export) is not listed on the site's landing page among the advertised APIs, and its exact functionality — what \"users/export\" returns, what input it expects, and what the response schema looks like — is undocumented in any crawled page.\n\nBecause the docs, pricing, and README pages all returned only a \"Connect wallet\" stub with no substantive content, there is very little information available about the request format, response structure, or actual data returned by this endpoint. The x402 challenge is live and well-formed, confirming the endpoint is operational, but the lack of documentation makes it difficult to assess what value it delivers.","tags":[],"capabilities":["x402-payment","usdc-payment","base-network","data-export","user-export","http-post"],"categories":["data"],"synonyms":["user export API","data export","premium API","x402 data endpoint","USDC pay-per-request","lowpaymentfee"],"warnings":["Endpoint /api/v2/users/export is not listed among the site's publicly advertised APIs","No documentation available — docs, pricing, and README pages all return only a 'Connect wallet' stub","Request body schema and response schema are completely unknown","The maxAmountRequired of 20000 USDC units may not correspond to the $0.02 pricing advertised for other endpoints on the site"],"endpointUrl":"https://lowpaymentfee.com/api/v2/users/export","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/v2/users/export","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 well-formed, confirming the endpoint is operational. However, the specific endpoint is not listed among the site's advertised APIs, there is zero documentation on request/response schemas, and all doc pages returned only a wallet-connect stub. The actual purpose of 'users/export' is 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'0.02':112 '000':74 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':80 '20':73 '300':85 '402':56 'USDC pay-per-request' 'access':39,124 'actual':198 'advertis':91,141 'ai/ml':103 'among':139 'amount':68 'analyt':102 'api':38,99,117,142 'assess':227 'avail':190 'base':9,24,64 'base-network' 'behind':47 'broad':93 'capabl':42 'catalog':94 'challeng':57,206 'confirm':213 'connect':178 'content':184 'crawl':165 'data':5,20,101,199 'data export' 'data-export' 'deliv':231 'difficult':225 'doc':169 'document':222 'endpoint':7,22,32,53,128,203,215 'exact':145 'expect':153 'export':6,21,41 'finance/web3':105 'form':212 'format':194 'function':146 'gate':3,18,46 'host':88 'howev':125 'http':44 'http-post' 'infer':104 'inform':189 'infrastructur':107 'input':151 'instant':123 'key':118 'lack':220 'land':137 'like':160 'limit':121 'list':132 'littl':188 'live':208 'look':159 'lowpaymentfee' 'lowpaymentfee.com':34,90 'make':223 'maximum':67 'network':65 'oper':217 'page':138,166,173 'paid':10,25 'payabl':98 'payment':50,59 'per':12,27,70,113 'per-request':11,26 'post':45 'premium':37 'premium API' 'price':110,170 'protocol':51 'provid':35 'rate':120 'readm':172 'request':13,28,71,114,193 'requir':58,69 'respons':157,195 'return':54,149,175,200 'schema':158 'second':86 'site':89,135 'span':100 'specif':127 'structur':196 'stub':180 'substant':183 'timeout':83 'token':79 'undocu':162 'unit':75 'usdc':15,30,61,78 'usdc-payment' 'user':4,19,40 'user export API' 'user-export' 'users/export':148 'util':108 'valu':229 'via':43 'wallet':179 'well':211 'well-form':210 'x402':2,17,49,97,205 'x402 data endpoint' 'x402-gated':1,16 'x402-payable':96 'x402-payment'","prices":[{"id":"29ae90d8-0ec8-4a3c-a670-0f61e06ca3d5","listingId":"c0af95ca-d3ea-41b2-93fb-9cee340edaaa","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/v2/users/export","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:31:59.090Z"}],"sources":[{"listingId":"c0af95ca-d3ea-41b2-93fb-9cee340edaaa","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v2/users/export","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:31:59.090Z","lastSeenAt":"2026-04-23T20:01:20.052Z"}],"details":{"listingId":"c0af95ca-d3ea-41b2-93fb-9cee340edaaa","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v2/users/export \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"The endpoint returns a 402 challenge requiring USDC payment on the Base network with maxAmountRequired of 20000","source_url":"https://lowpaymentfee.com/api/v2/users/export"},{"claim":"The site advertises APIs at $0.02/request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The /api/v2/users/export endpoint is not listed among the site's publicly advertised API catalog","source_url":"https://lowpaymentfee.com"},{"claim":"Docs, pricing, and README pages return only a 'Connect wallet' stub with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Exporting user data via a pay-per-request model without API key registration","Programmatic data retrieval gated by on-chain USDC micropayment","Agent-driven data export workflows using x402 payment protocol"],"bestFor":["Developers wanting keyless, pay-per-use data export","AI agents that can handle x402 payment challenges on Base","Users who prefer on-chain micropayments over subscription billing"],"notFor":["Anyone needing detailed API documentation before integrating","High-volume bulk export where per-request pricing is cost-prohibitive","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-27T19:00:57.529Z"},"updatedAt":"2026-04-23T20:01:20.052Z"}}