{"id":"4d7b96e4-c0ab-4a1f-bc9d-f9b7d3921451","shortId":"4kQcCp","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 `/api/v1/hr/documents/39` is part of the lowpaymentfee.com platform, a collection of x402 protocol pay-per-call APIs spanning data analytics, AI/ML, finance, infrastructure, and more. The specific resource appears to serve an HR document (document ID 39) behind a paywall. Payment is settled on the Base network using USDC (contract 0x8335…2913) via the x402 exact-payment scheme.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. The platform advertises uniform $0.02/request pricing across all its endpoints, with no API keys, no rate limits, and instant access. No OpenAPI schema or detailed documentation is available for this specific endpoint beyond the x402 challenge metadata.\n\nBecause the endpoint path suggests HR/document content and the platform provides no further description of what data is returned, the actual response payload is unknown. The broader lowpaymentfee.com site hosts roughly 16 listed endpoints across analytics, AI, finance, and utility categories, all at the same price point. Without documentation or example responses for this particular resource, agents should treat this as a low-cost exploratory call.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","hr-document-access","no-api-key"],"categories":["data","documents"],"synonyms":["HR document API","pay-per-call document","x402 document endpoint","USDC micropayment API","lowpaymentfee HR","Base network API","402 payment document"],"warnings":["No documentation or OpenAPI schema available for this endpoint","Response payload structure is completely unknown — no outputSchema content fields provided","The meaning of 'HR documents/39' is unclear; could be placeholder or demo content","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/39","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/39","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no documentation for this specific resource, no example request/response, and the purpose of 'HR documents/39' is entirely opaque. Effectively a stub 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'/request':126 '0.02':118,125 '000':109 '0x8335':82 '16':190 '20':108 '2913':83 '39':68 '402 payment document' '6':114 'Base network API' 'HR document API' 'USDC micropayment API' 'accept':100 'access':141 'across':128,193 'actual':179 'advertis':123 'agent':215 'ai':195 'ai/ml':52 'amount':105 'analyt':51,194 'api':48,134 'appear':60 'avail':149 'base':8,22,77,110 'base-network' 'behind':69 'beyond':154 'broader':185 'call':47,225 'categori':199 'challeng':93,157 'collect':40 'confirm':94 'content':165 'contract':81 'cost':223 'data':50,175 'decim':115 'descript':172 'detail':146 'document':5,19,65,66,147,207 'endpoint':6,20,30,96,131,153,161,192 'equal':117 'exact':88 'exact-pay':87 'exampl':209 'exploratori':224 'financ':53,196 'gate':3,17 'host':188 'hr':4,18,64 'hr-document-access' 'hr/document':164 'id':67 'infrastructur':54 'instant':140 'key':135 'limit':138 'list':191 'live':98 'low':222 'low-cost':221 'lowpaymentfee HR' 'lowpaymentfee.com':37,186 'maximum':104 'metadata':158 'network':78 'no-api-key' 'openapi':143 'part':34 'particular':213 'path':162 'pay':10,24,45 'pay-per-cal':44 'pay-per-call document' 'pay-per-request':9,23 'payload':181 'payment':72,89 'paywal':71 'per':11,25,46,119 'platform':38,122,168 'point':205 'post':101 'price':127,204 'protocol':43 'provid':169 'rate':137 'request':12,26,102,120 'requir':106 'resourc':59,214 'respons':180,210 'return':177 'rough':189 'schema':144 'scheme':90 'serv':62 'settl':74 'site':187 'span':49 'specif':58,152 'suggest':163 'treat':217 'uniform':124 'unit':111 'unknown':183 'usdc':14,28,80,113 'usdc-settlement' 'use':79 'util':198 'via':84 'without':206 'x402':2,16,42,86,92,156 'x402 document endpoint' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"a71186e7-4ce8-4cdd-97b7-79e636f931f3","listingId":"4d7b96e4-c0ab-4a1f-bc9d-f9b7d3921451","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/39","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:19.721Z"}],"sources":[{"listingId":"4d7b96e4-c0ab-4a1f-bc9d-f9b7d3921451","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/documents/39","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:19.721Z","lastSeenAt":"2026-04-23T17:32:46.293Z"}],"details":{"listingId":"4d7b96e4-c0ab-4a1f-bc9d-f9b7d3921451","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/documents/39 \\\n  -H \"X-PAYMENT: <x402-payment-header>\" \\\n  -H \"Content-Type: application/json\"","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 network","source_url":"https://lowpaymentfee.com/api/v1/hr/documents/39"},{"claim":"Platform-wide pricing is $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/hr/documents/39"}],"useCases":["Retrieving HR document data on-demand with per-call USDC micropayments","Agents autonomously purchasing document access without API key provisioning","Programmatic access to paywall-protected document resources"],"bestFor":["AI agents needing keyless, pay-per-call document access","Developers experimenting with x402 protocol integrations","Low-cost one-off document retrieval without subscription commitments"],"notFor":["Bulk document retrieval requiring thousands of calls (no volume discounts documented)","Use cases requiring detailed schema validation or guaranteed response structure","Non-crypto workflows that cannot settle USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:10.108Z"},"updatedAt":"2026-04-23T17:32:46.293Z"}}