{"id":"4002c164-cf13-436f-9fa6-20ebd286cbaa","shortId":"qQBj7G","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 12) 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/12` 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\nThe endpoint is live and returns a well-formed x402 version 1 challenge. However, no OpenAPI schema, request/response examples, or detailed documentation is available for this specific HR documents endpoint. The broader site lists many endpoint categories but provides no further detail on what the HR documents API returns or what input it expects beyond a POST body. The \"HR documents\" category itself does not appear on the landing page's public listing, making this endpoint's purpose somewhat opaque.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","hr-document-retrieval","json-response","no-api-key"],"categories":["data","documents"],"synonyms":["HR document API","human resources document","paid document endpoint","x402 document access","USDC API payment","Base network API","lowpaymentfee"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The /api/v1/hr/documents/ path is not listed among the provider's publicly advertised API categories","No request body schema or response examples are documented anywhere","The broader site's /api, /pricing, and /README pages all returned only a 'Connect wallet' prompt with no useful content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/documents/12","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/12","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI schema, no request/response examples, and no documentation explaining what the HR documents endpoint actually returns or what input it expects. The endpoint category (HR documents) is not even listed on the provider's public landing page, making its purpose 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'/request':127 '0.02':111,126 '000':99 '0x8335':105 '1':157 '12':40 '20':98 '2913':106 '6':116 'Base network API' 'HR document API' 'USDC API payment' 'accept':84 'across':130 'advertis':93 'ai/ml':64 'analyt':63 'api':59,135,193 'appear':211 'asset':104 'avail':169 'base':8,22,76,100,108 'base-network' 'behind':41 'beyond':200 'bodi':203 'broader':50,177 'call':58 'categori':182,207 'challeng':92,158 'commit':143 'confirm':123 'cost':96 'crypto':67 'data':62 'decim':117 'detail':166,187 'document':5,19,36,38,167,174,192,206 'dozen':53 'endpoint':6,20,30,60,82,132,146,175,181,221 'equal':110 'exampl':164 'expect':199 'financ':66 'flat':125 'form':154 'gate':3,17 'howev':159 'hr':4,18,35,173,191,205 'hr-document-retrieval' 'human resources document' 'id':39 'infer':65 'infrastructur':68 'input':197 'json':89 'json-response' 'key':136 'land':121,214 'limit':139 'list':179,218 'live':148 'lowpaymentfee' 'lowpaymentfee.com':32 'make':219 'mani':180 'maximum':95 'minimum':142 'model':129 'network':77 'no-api-key' 'offer':52 'opaqu':225 'openapi':161 'page':122,215 'paid document endpoint' 'part':47 'pay':10,24,56 'pay-per-cal':55 'pay-per-request':9,23 'paywal':44 'per':11,25,57,112 'platform':51,119 'post':85,202 'price':128 'provid':184 'public':217 'purpos':223 'rate':138 'request':12,26,86,113 'request/response':163 'requir':144 'resourc':37 'return':88,150,194 'schema':162 'serv':33 'settl':73 'site':178 'somewhat':224 'span':61 'specif':81,172 'unit':101 'usdc':14,28,79,103,114 'usdc-settlement' 'use':78,115 'util':69 'version':156 'well':153 'well-form':152 'x402':2,16,43,91,155 'x402 document access' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"00c6cb13-6ae6-4346-a30c-330ea7522158","listingId":"4002c164-cf13-436f-9fa6-20ebd286cbaa","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/12","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:19.297Z"}],"sources":[{"listingId":"4002c164-cf13-436f-9fa6-20ebd286cbaa","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/documents/12","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:19.297Z","lastSeenAt":"2026-04-23T20:33:36.641Z"}],"details":{"listingId":"4002c164-cf13-436f-9fa6-20ebd286cbaa","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/documents/12 \\\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 platform charges $0.02 per request with no API keys, no rate limits, and no minimums","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge specifies maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network","source_url":"https://lowpaymentfee.com/api/v1/hr/documents/12"},{"claim":"The endpoint accepts POST requests and returns application/json","source_url":"https://lowpaymentfee.com/api/v1/hr/documents/12"}],"useCases":["Retrieving HR document data via a micropayment-gated API call","Integrating pay-per-request document access into agent workflows","Accessing premium content without traditional API key provisioning"],"bestFor":["Agents needing on-demand document retrieval with crypto micropayments","Developers exploring x402 protocol integrations on Base","Use cases where keyless, pay-as-you-go API access is preferred"],"notFor":["Bulk document retrieval at scale (no documented batch support)","Users who need detailed API documentation or schema guarantees before integrating","Non-crypto payment workflows (only USDC on Base is accepted)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:10.729Z"},"updatedAt":"2026-04-23T20:33:36.641Z"}}