{"id":"144c85f4-fd43-4c71-b036-e3c04e3b0b83","shortId":"2HKCJk","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 42) behind an x402 payment wall. 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 via USDC on the Base network using the x402 protocol.\n\nThe specific endpoint `/api/v1/hr/documents/42` accepts POST requests and returns JSON. The x402 challenge indicates a maximum cost of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform advertises uniform $0.02/request pricing across all endpoints, with no API keys, no rate limits, and no minimum commitments — payment is handled entirely via the x402 X-PAYMENT header.\n\nDocumentation is extremely sparse. The docs, API, pricing, and README pages all render only a \"Connect wallet\" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the HR documents endpoint actually returns. The endpoint is confirmed live (402 challenge captured), but without documentation it is unclear what data is served or what POST body (if any) is expected. The platform appears to be a demonstration or early-stage x402 showcase rather than a mature production API.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","hr-documents","post-method"],"categories":["data","infrastructure"],"synonyms":["x402 API","pay-per-call API","USDC micropayment API","Base network API","HR document API","lowpaymentfee","402 payment protocol"],"warnings":["No documentation available — all doc pages render only 'Connect wallet'","No OpenAPI or request/response schema provided","Purpose and content of '/api/v1/hr/documents/42' is undocumented","Platform may be a demo/showcase rather than a production service","No information on what POST body is expected"],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/documents/42","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/42","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.250","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what the HR documents endpoint actually returns. Docs pages render only 'Connect wallet' with no content. This is effectively a stub 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'/request':126 '0.02':114,125 '000':104 '0x8335':109 '20':103 '402':199 '402 payment protocol' '42':40 '6':119 'Base network API' 'HR document API' 'USDC micropayment API' 'accept':89 'across':128 'actual':192 'advertis':123 'ai/ml':65 'analyt':64 'api':60,133,159,238 'appear':222 'base':8,22,79,105,111 'base-network' 'behind':41 'bodi':215 'broader':51 'call':59 'captur':201 'challeng':97,200 'commit':141 'confirm':197 'connect':168 'content':174 'cost':101 'crypto':68 'data':63,209 'decim':120 'demonstr':226 'descript':185 'doc':158 'document':5,19,36,38,153,190,204 'dozen':54 'earli':229 'early-stag':228 'endpoint':6,20,30,61,87,130,191,195 'entir':145 'equal':113 'exampl':182 'expect':219 'extrem':155 'financ':67 'gate':3,17 'handl':144 'header':152 'hr':4,18,35,189 'hr-documents' 'id':39 'indic':98 'infer':66 'infrastructur':69 'json':94 'json-response' 'key':134 'limit':137 'live':198 'lowpaymentfee' 'lowpaymentfee.com':32 'matur':236 'maximum':100 'minimum':140 'network':80 'offer':53 'openapi':178 'page':163 'part':48 'pay':10,24,57 'pay-per-cal':56 'pay-per-call API' 'pay-per-request':9,23 'payment':44,142,151 'per':11,25,58,115 'platform':52,122,221 'post':90,214 'post-method' 'price':127,160 'product':237 'prompt':170 'protocol':84 'rate':136 'rather':233 'readm':162 'render':165 'request':12,26,91,116 'request/response':181 'resourc':37 'return':93,193 'schema':179 'serv':33,211 'settl':74 'showcas':232 'span':62 'spars':156 'specif':86 'stage':230 'substant':173 'unclear':207 'uniform':124 'unit':106 'usdc':14,28,76,108,117 'usdc-settlement' 'use':81,118 'util':70 'via':75,146 'wall':45 'wallet':169 'without':203 'x':150 'x-payment':149 'x402':2,16,43,83,96,148,231 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"ccb04ac1-285c-402c-93ed-510ee8de43e5","listingId":"144c85f4-fd43-4c71-b036-e3c04e3b0b83","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/42","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:19.407Z"}],"sources":[{"listingId":"144c85f4-fd43-4c71-b036-e3c04e3b0b83","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/documents/42","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:19.407Z","lastSeenAt":"2026-04-22T21:32:07.274Z"}],"details":{"listingId":"144c85f4-fd43-4c71-b036-e3c04e3b0b83","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/documents/42 \\\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 maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/hr/documents/42"},{"claim":"USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/hr/documents/42"},{"claim":"Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Available API categories include Data & Analytics, AI & ML, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving HR document data via a single micropayment","Testing x402 protocol integrations with a low-cost endpoint","Agent-driven document retrieval without API key management"],"bestFor":["Developers experimenting with x402 payment flows","Agents that need keyless, pay-per-call API access","Low-volume document retrieval where $0.02/call is acceptable"],"notFor":["Production HR systems requiring documented, stable schemas","High-volume bulk document retrieval (no batch endpoint documented)","Users without USDC on Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:10.612Z"},"updatedAt":"2026-04-22T21:32:07.274Z"}}