{"id":"16b72cf3-2fd5-46b7-a465-917b131836ab","shortId":"ACspg7","kind":"x402","title":"Pay-per-call HR document endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call HR document endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This x402-enabled endpoint at `/api/v1/hr/documents/47` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs spanning data & analytics, AI/ML, finance, infrastructure, and more. Each call is settled on the Base network using USDC with no API keys, no rate limits, and no subscriptions — just a per-request micropayment via the x402 protocol.\n\nThe specific endpoint probed (`/api/v1/hr/documents/47`) is listed under \"Premium API Access\" and costs up to $0.02 per request (maxAmountRequired of 20,000 base units of USDC, which has 6 decimals = $0.02). The endpoint accepts HTTP POST and returns `application/json`. However, the exact schema of the request body and the structure of the response are not documented in any publicly available OpenAPI spec or docs page — the crawled /api, /pricing, and /README pages all resolve to a minimal \"Connect wallet\" prompt with no further documentation.\n\nBecause the endpoint path references \"hr/documents/47,\" it likely returns a specific HR-related document or record, but without response examples or schema definitions this is speculative. The platform advertises uniform $0.02 pricing across all endpoints, instant access, and no rate limits. The x402 challenge was successfully captured (HTTP 402), confirming the endpoint is live and accepting payment challenges on Base mainnet.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","json-response","hr-documents"],"categories":["data","documents"],"synonyms":["lowpaymentfee","low payment fee API","x402 micropayment API","HR document API","pay-per-call API","USDC API access","Base network API"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The /api, /pricing, and /README pages all return only a 'Connect wallet' prompt with no useful docs","The exact purpose and response format of /api/v1/hr/documents/47 is unknown — 'Premium API Access' is generic","No request body schema is documented; callers must guess or discover the expected input"],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/documents/47","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/47","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond a landing page listing, and the specific purpose of the /hr/documents/47 endpoint is undocumented. This is effectively a stub 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'/api/v1/hr/documents/47':41,101 '/pricing':165 '/readme':167 '/request':17,34 '0.02':16,33,112,127,212 '000':118 '20':117 '402':230 '6':125 'Base network API' 'HR document API' 'USDC API access' 'accept':130,237 'access':107,218 'across':214 'advertis':210 'ai/ml':62 'analyt':61 'api':58,79,106 'application/json':135 'avail':156 'base':9,26,73,119,241 'base-network' 'bodi':143 'broad':51 'call':4,21,68 'captur':228 'catalog':52 'challeng':225,239 'confirm':231 'connect':174 'cost':109 'crawl':163 'data':60 'decim':126 'definit':204 'doc':160 'document':6,23,152,180,195 'enabl':38 'endpoint':7,24,39,99,129,183,216,233 'exact':138 'exampl':201 'financ':63 'howev':136 'hr':5,22,193 'hr-documents' 'hr-relat':192 'hr/documents/47':186 'http':131,229 'infrastructur':64 'instant':217 'json-response' 'key':80 'like':188 'limit':83,222 'list':103 'live':235 'low payment fee API' 'lowpaymentfee' 'lowpaymentfee.com':46 'mainnet':242 'maxamountrequir':115 'micropay':92 'minim':173 'network':74 'no-api-key' 'offer':49 'openapi':157 'page':161,168 'part':43 'path':184 'pay':2,19,55 'pay-per-cal':1,18 'pay-per-call API' 'pay-per-request':54 'payment':238 'per':3,20,56,90,113 'per-request':89 'platform':47,209 'post':132 'premium':105 'price':213 'probe':100 'prompt':176 'protocol':96 'public':155 'rate':82,221 'record':197 'refer':185 'relat':194 'request':57,91,114,142 'resolv':170 'respons':149,200 'return':134,189 'schema':139,203 'settl':12,29,70 'span':59 'spec':158 'specif':98,191 'specul':207 'structur':146 'subscript':86 'success':227 'uniform':211 'unit':120 'usdc':14,31,76,122 'usdc-settlement' 'use':75 'via':10,27,93 'wallet':175 'without':199 'x402':11,28,37,95,224 'x402 micropayment API' 'x402-enabled':36 'x402-payment'","prices":[{"id":"8a400798-2586-4207-9c8b-3d9818e669bb","listingId":"16b72cf3-2fd5-46b7-a465-917b131836ab","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/47","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:19.380Z"}],"sources":[{"listingId":"16b72cf3-2fd5-46b7-a465-917b131836ab","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/documents/47","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:19.380Z","lastSeenAt":"2026-04-23T19:02:13.944Z"}],"details":{"listingId":"16b72cf3-2fd5-46b7-a465-917b131836ab","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/documents/47 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402-payment-header>\"","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/47"},{"claim":"Platform advertises $0.02/request pricing, no API keys, no rate limits, 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/47"}],"useCases":["Retrieving HR document data on a per-request payment basis","Agent-driven document access without pre-registration or API keys","Programmatic micropayment-gated data retrieval on Base"],"bestFor":["AI agents needing keyless, pay-as-you-go document access","Developers experimenting with x402 micropayment protocols","Applications requiring on-chain payment settlement for API calls"],"notFor":["Bulk document retrieval at high volume (no documented batch endpoints)","Users who need detailed API documentation or response schemas before integrating"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:10.668Z"},"updatedAt":"2026-04-23T19:02:13.944Z"}}