{"id":"520718fd-9f7d-43f2-82a8-5a643d5d4108","shortId":"hd7ssp","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 49) 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, and utility services — all settled via USDC on the Base network using the x402 protocol.\n\nThe specific endpoint `/api/v1/hr/documents/49` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (asset 0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform's landing page confirms a flat $0.02/request pricing model across all endpoints, with no API keys, no rate limits, and no minimum commitments required.\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 document endpoint actually returns. The endpoint is live (returns a valid 402 challenge), but without documentation it is unclear what input the POST body should contain or what the response payload looks like. The \"HR documents\" category is not listed on the homepage's API catalog, making this endpoint's purpose and data content uncertain.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","hr-document-retrieval","json-response"],"categories":["data","documents"],"synonyms":["HR document API","human resources document","x402 paid API","USDC micropayment API","lowpaymentfee","pay-per-call document access","Base network API"],"warnings":["No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'","No OpenAPI or request/response schema provided","The '/api/v1/hr/documents/49' path is not listed in the site's public API catalog, raising questions about its intended use","Unknown request body format — POST is required but no input schema is documented","Content may involve HR/personnel data — verify compliance with applicable data protection regulations"],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/documents/49","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/49","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, but there is no documentation, no OpenAPI schema, no request/response examples, and the HR documents category isn't even listed on the site's own catalog. The purpose and content of this specific endpoint are essentially 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'/request':130 '0.02':114,129 '000':102 '0x8335':108 '20':101 '2913':109 '402':196 '49':40 '6':119 'Base network API' 'HR document API' 'USDC micropayment API' 'accept':87 'across':133 'actual':187 'advertis':96 'ai/ml':64 'analyt':63 'api':59,138,154,229 'asset':107 'base':8,22,77,103,111 'base-network' 'behind':41 'bodi':208 'broader':50 'call':58 'catalog':230 'categori':221 'challeng':95,197 'commit':146 'confirm':126 'connect':163 'contain':210 'content':169,238 'cost':99 'crypto':67 'data':62,237 'decim':120 'descript':180 'doc':153 'document':5,19,36,38,148,185,200,220 'dozen':53 'endpoint':6,20,30,60,85,135,186,190,233 'equal':113 'exampl':177 'extrem':150 'financ':66 'flat':128 'gate':3,17 'homepag':227 'hr':4,18,35,184,219 'hr-document-retrieval' 'human resources document' 'id':39 'infer':65 'input':205 'json':92 'json-response' 'key':139 'land':124 'like':217 'limit':142 'list':224 'live':192 'look':216 'lowpaymentfee' 'lowpaymentfee.com':32 'make':231 'maximum':98 'minimum':145 'model':132 'network':78 'offer':52 'openapi':173 'page':125,158 'part':47 'pay':10,24,56 'pay-per-cal':55 'pay-per-call document access' 'pay-per-request':9,23 'payload':215 'paywal':44 'per':11,25,57,115 'platform':51,122 'post':88,207 'price':131,155 'prompt':165 'protocol':82 'purpos':235 'rate':141 'readm':157 'render':160 'request':12,26,89,116 'request/response':176 'requir':147 'resourc':37 'respons':214 'return':91,188,193 'schema':174 'serv':33 'servic':70 'settl':72 'span':61 'spars':151 'specif':84 'substant':168 'uncertain':239 'unclear':203 'unit':104 'usdc':14,28,74,106,117 'usdc-settlement' 'use':79,118 'util':69 'valid':195 'via':73 'wallet':164 'without':199 'x402':2,16,43,81,94 'x402 paid API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"01746357-5255-47a2-8824-bcce96a347b9","listingId":"520718fd-9f7d-43f2-82a8-5a643d5d4108","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/49","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:19.467Z"}],"sources":[{"listingId":"520718fd-9f7d-43f2-82a8-5a643d5d4108","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/documents/49","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:19.467Z","lastSeenAt":"2026-04-23T19:02:14.052Z"}],"details":{"listingId":"520718fd-9f7d-43f2-82a8-5a643d5d4108","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/documents/49 \\\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 valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/hr/documents/49"},{"claim":"The platform charges $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/hr/documents/49"}],"useCases":["Retrieving HR document data via a single paid API call","Programmatic access to document #49 from an HR dataset","Agent-driven document fetching with automatic USDC micropayment"],"bestFor":["Agents that need on-demand access to specific HR documents","Developers exploring x402 pay-per-request patterns on Base","Use cases requiring keyless, no-signup API access"],"notFor":["Bulk document retrieval or batch processing (no documented batch endpoint)","Users who need detailed API documentation or schemas before integrating","Non-crypto users who cannot pay with USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:10.461Z"},"updatedAt":"2026-04-23T19:02:14.052Z"}}