{"id":"1601b896-e16b-4c93-af5a-1f01ab7baa5b","shortId":"N5kvyv","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 a specific HR document resource (`/api/v1/hr/documents/29`) behind an x402 paywall. The provider operates a broader platform offering dozens of pay-per-call API endpoints across categories including data analytics, AI/ML inference, finance/Web3, and infrastructure utilities — all settled on the Base network using USDC via the x402 protocol.\n\nThe specific endpoint probed (`/api/v1/hr/documents/29`) is live and returns a valid x402 challenge. It accepts POST requests and charges up to 20,000 base units of USDC (0.02 USD) per call, paid to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. The response MIME type is `application/json`. The platform advertises no API keys, no rate limits, and instant access.\n\nHowever, the crawled documentation pages (`/docs`, `/api`, `/pricing`, `/README`) all returned 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 path suggests it retrieves a human-resources-related document by ID, but the exact payload structure is unknown. The broader platform lists many endpoints at $0.02 each, but this specific HR documents path is not listed on the homepage, making its purpose and data content unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","json-response","hr-document-retrieval"],"categories":["data"],"synonyms":["HR document API","human resources document","x402 API","pay-per-call API","USDC micropayment API","lowpaymentfee","Base network API"],"warnings":["No OpenAPI schema or endpoint documentation available","The /api/v1/hr/documents/29 path is not listed among the provider's advertised endpoints on the homepage","All documentation pages (/docs, /api, /pricing, /README) returned only a 'Connect wallet' prompt with no content","Request body schema and response schema are completely unknown","The nature and source of the 'HR document' data is undisclosed"],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/documents/29","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/29","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, but there is no documentation, no OpenAPI schema, no request/response examples, and the HR documents path is not even listed on the provider's homepage. The purpose and data content of this specific endpoint are entirely 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'/api/v1/hr/documents/29':39,86 '/docs':142 '/pricing':144 '/readme':145 '0.02':109,204 '000':104 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':116 '20':103 'Base network API' 'HR document API' 'USDC micropayment API' 'accept':96 'access':136 'across':59 'actual':174 'address':115 'advertis':127 'ai/ml':64 'analyt':63 'api':57,129 'application/json':124 'base':8,22,74,105,118 'base-network' 'behind':40 'broader':48,198 'call':56,112 'categori':60 'challeng':94 'charg':100 'connect':150 'content':156,223 'crawl':139 'data':62,222 'descript':167 'document':5,19,37,140,172,187,210 'dozen':51 'endpoint':6,20,30,58,84,173,177,202 'exact':192 'exampl':164 'finance/web3':66 'gate':3,17 'homepag':217 'howev':137 'hr':4,18,36,171,209 'hr-document-retrieval' 'human':184 'human resources document' 'human-resources-rel':183 'id':189 'includ':61 'infer':65 'infrastructur':68 'instant':135 'json-response' 'key':130 'limit':133 'list':200,214 'live':88 'lowpaymentfee' 'lowpaymentfee.com':32 'make':218 'mani':201 'mime':121 'network':75 'offer':50 'openapi':160 'oper':46 'page':141 'paid':113 'path':178,211 'pay':10,24,54 'pay-per-cal':53 'pay-per-call API' 'pay-per-request':9,23 'payload':193 'paywal':43 'per':11,25,55,111 'platform':49,126,199 'post':97 'probe':85 'prompt':152 'protocol':81 'provid':45 'purpos':220 'rate':132 'relat':186 'request':12,26,98 'request/response':163 'resourc':38,185 'respons':120 'retriev':181 'return':90,147,175 'schema':161 'serv':33 'settl':71 'specif':35,83,208 'structur':194 'substant':155 'suggest':179 'type':122 'unclear':224 'unit':106 'unknown':196 'usd':110 'usdc':14,28,77,108 'usdc-settlement' 'use':76 'util':69 'valid':92 'via':78 'wallet':151 'x402':2,16,42,80,93 'x402 API' 'x402-gated':1,15 'x402-payment'","prices":[{"id":"814c9e76-736e-450e-a336-cd0fb7b8844e","listingId":"1601b896-e16b-4c93-af5a-1f01ab7baa5b","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/29","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:19.351Z"}],"sources":[{"listingId":"1601b896-e16b-4c93-af5a-1f01ab7baa5b","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/documents/29","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:19.351Z","lastSeenAt":"2026-04-23T19:02:13.923Z"}],"details":{"listingId":"1601b896-e16b-4c93-af5a-1f01ab7baa5b","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/documents/29 \\\n  -H \"X-PAYMENT: <x402_payment_token>\" \\\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 valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/hr/documents/29"},{"claim":"The platform advertises $0.02 per request, no API keys, no rate limits, instant access, Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Documentation pages return only 'Connect wallet' with no substantive content","source_url":"https://lowpaymentfee.com/docs"}],"useCases":["Retrieving HR-related documents programmatically via a single paid API call","Agent-driven document access without API key registration","Micropayment-gated data retrieval on Base L2"],"bestFor":["Agents needing keyless, pay-per-use document access","Developers experimenting with x402 payment flows on Base","Automated workflows requiring on-demand HR document fetching"],"notFor":["Users who need detailed API documentation or schema guarantees before integrating","Bulk document retrieval at scale (no documented batch endpoints)","Anyone needing non-USDC or non-Base payment options"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:10.673Z"},"updatedAt":"2026-04-23T19:02:13.923Z"}}