{"id":"a7786c99-06bf-4819-99e7-7031a521b1df","shortId":"5ZbsU8","kind":"x402","title":"x402-gated HR document endpoint on Base, pay-per-request with USDC.","tagline":"x402-gated HR document endpoint on Base, pay-per-request with USDC.","description":"This endpoint at lowpaymentfee.com serves an HR document resource (document ID 25) behind an x402 paywall. It is part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance, crypto, infrastructure utilities, and more — all settled on the Base network using USDC.\n\nThe specific endpoint `/api/v1/hr/documents/25` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base), which equals $0.02 per request — consistent with the platform's uniform $0.02/request pricing. Payment is made via the x402 \"exact\" scheme to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, with a 300-second timeout.\n\nThe platform advertises no API keys, no rate limits, and instant access. However, documentation is extremely thin — the /docs, /api, /pricing, and /README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI spec, no request/response schema documentation, and no description of what the HR documents endpoint actually returns. The endpoint is live (402 challenge confirmed), but the lack of documentation makes it difficult to know what data you will receive or what input the POST body expects.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","hr-documents","json-response"],"categories":["data"],"synonyms":["HR document API","human resources document","paid API endpoint","x402 API","USDC micropayment API","lowpaymentfee","Base network API"],"warnings":["No documentation available — /docs, /api, /pricing, and /README pages all show only 'Connect wallet' with no content","No OpenAPI or schema definition for request body or response","The nature and contents of 'HR documents' endpoint is completely undocumented","No agents.txt present","Cannot verify what data document ID 25 contains or whether the endpoint returns meaningful results"],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/documents/25","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/hr/documents/25","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 challenge with clear pricing. However, there is no OpenAPI spec, no documentation of request/response schemas, and no explanation of what the HR documents endpoint actually provides. The docs, pricing, and README pages are all empty beyond a wallet-connect prompt. This is effectively a stub 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'/api/v1/hr/documents/25':83 '/docs':156 '/pricing':158 '/readme':160 '/request':120 '0.02':110,119 '000':99 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':132 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':105 '20':98 '25':40 '300':135 '402':197 'Base network API' 'HR document API' 'USDC micropayment API' 'accept':84 'access':149 'actual':191 'address':131 'advertis':93,140 'ai/ml':64 'analyt':63 'api':59,142 'asset':104 'base':8,22,76,100,107 'base-network' 'behind':41 'bodi':220 'broader':50 'call':58 'challeng':92,198 'confirm':199 'connect':166 'consist':113 'content':172 'cost':96 'crypto':67 'data':62,211 'descript':184 'difficult':207 'document':5,19,36,38,151,181,189,204 'dozen':53 'endpoint':6,20,30,60,82,190,194 'equal':109 'exact':128 'expect':221 'extrem':153 'financ':66 'gate':3,17 'howev':150 'hr':4,18,35,188 'hr-documents' 'human resources document' 'id':39 'infer':65 'infrastructur':68 'input':217 'instant':148 'json':89 'json-response' 'key':143 'know':209 'lack':202 'limit':146 'live':196 'lowpaymentfee' 'lowpaymentfee.com':32 'made':124 'make':205 'maximum':95 'network':77 'offer':52 'openapi':176 'page':161 'paid API endpoint' 'part':47 'pay':10,24,56 'pay-per-cal':55 'pay-per-request':9,23 'payment':122 'paywal':44 'per':11,25,57,111 'platform':51,116,139 'post':85,219 'price':121 'prompt':168 'rate':145 'receiv':214 'render':163 'request':12,26,86,112 'request/response':179 'resourc':37 'return':88,192 'schema':180 'scheme':129 'second':136 'serv':33 'settl':73 'span':61 'spec':177 'specif':81 'substant':171 'thin':154 'timeout':137 'uniform':118 'unit':101 'usdc':14,28,79,103 'usdc-settlement' 'use':78 'util':69 'via':125 'wallet':167 'x402':2,16,43,91,127 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"523f1d83-e663-42b1-aea4-2430ab78f8a1","listingId":"a7786c99-06bf-4819-99e7-7031a521b1df","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/hr/documents/25","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:19.323Z"}],"sources":[{"listingId":"a7786c99-06bf-4819-99e7-7031a521b1df","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/documents/25","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:19.323Z","lastSeenAt":"2026-04-23T20:33:36.669Z"}],"details":{"listingId":"a7786c99-06bf-4819-99e7-7031a521b1df","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/documents/25 \\\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 challenge with x402Version 1, exact scheme, on Base network, with maxAmountRequired of 20000 base units of USDC","source_url":"https://lowpaymentfee.com/api/v1/hr/documents/25"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/hr/documents/25"},{"claim":"Platform advertises uniform $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 HR document data via a pay-per-call model","Programmatic access to document #25 from an HR dataset","Agent-driven document fetching with on-chain USDC payment"],"bestFor":["Developers wanting no-signup, pay-per-request API access","AI agents that can settle x402 payments on Base","Users needing low-cost document retrieval without API keys"],"notFor":["Anyone needing detailed API documentation or schema guarantees before integrating","Bulk or high-volume document retrieval where per-request costs add up","Users who cannot transact in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:10.704Z"},"updatedAt":"2026-04-23T20:33:36.669Z"}}