{"id":"48d341f9-dad3-4e18-acce-876272689c91","shortId":"tB7GUn","kind":"x402","title":"HR reviews data endpoint, pay-per-call via x402 on Base with USDC at $0.02/request.","tagline":"HR reviews data endpoint, pay-per-call via x402 on Base with USDC at $0.02/request.","description":"This endpoint at `/api/v1/hr/reviews/6` is part of the lowpaymentfee.com platform, a collection of x402-enabled APIs spanning data analytics, AI/ML, finance, infrastructure, and more. The specific resource appears to serve HR review data (likely a single review record identified by ID 6), accessible via HTTP POST and paid per-request using the x402 protocol.\n\nPayment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The maximum amount required per call is 20,000 base units of USDC, which with 6 decimals equals $0.02 USD — consistent with the site's advertised flat pricing of $0.02 per request across all endpoints. No API keys are required; authentication and payment happen entirely through the x402 `X-PAYMENT` header. The provider advertises no rate limits and instant access.\n\nThe endpoint is live and returns a proper 402 challenge when called without payment. However, documentation is extremely sparse: there is no OpenAPI spec, no request/response schema beyond the x402 challenge metadata, and no description of what fields the HR review object contains or what parameters the POST body accepts. The endpoint's exact purpose (\"HR reviews\") is inferred solely from the URL path. The broader lowpaymentfee.com site lists many endpoint categories but this specific HR endpoint is not listed on the homepage, raising questions about whether it is a demo/test resource or a production data endpoint.","tags":[],"capabilities":["x402-payment","usdc-base-network","pay-per-request","hr-data","json-response","no-api-key"],"categories":["data"],"synonyms":["HR review API","employee review data","human resources API","x402 paid endpoint","lowpaymentfee","pay-per-call API","Base USDC API"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The /api/v1/hr/reviews/6 path is not listed among the provider's advertised APIs on the homepage — it may be a test or undocumented resource","No example request or response bodies are available; the data structure is entirely unknown","The broader site pages (/api, /pricing, /README) returned only 'Connect wallet' with no useful content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/reviews/6","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/reviews/6","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 402 challenge, confirming it accepts payment on Base in USDC at $0.02. However, there is no OpenAPI spec, no request/response schema, no documentation of what the HR reviews resource actually returns, and this specific endpoint is not listed on the provider's homepage. Effectively a stub 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'/request':17,34 '0.02':16,33,120,131 '000':110 '0x833589fcd6edb6e08f4c7c32d4f71b54bda02913':101 '20':109 '402':171 '6':77,117 'Base USDC API' 'HR review API' 'accept':212 'access':78,162 'across':134 'advertis':127,156 'ai/ml':55 'amount':104 'analyt':54 'api':51,138 'appear':63 'authent':142 'base':12,29,96,111 'beyond':190 'bodi':211 'broader':228 'call':8,25,107,174 'categori':234 'challeng':172,193 'collect':46 'consist':122 'contain':205 'contract':100 'data':3,20,53,68,258 'decim':118 'demo/test':253 'descript':197 'document':178 'employee review data' 'enabl':50 'endpoint':4,21,36,136,164,214,233,239,259 'entir':146 'equal':119 'exact':216 'extrem':180 'field':200 'financ':56 'flat':128 'happen':145 'header':153 'homepag':245 'howev':177 'hr':1,18,66,202,218,238 'hr-data' 'http':80 'human resources API' 'id':76 'identifi':74 'infer':221 'infrastructur':57 'instant':161 'json-response' 'key':139 'like':69 'limit':159 'list':231,242 'live':166 'lowpaymentfee' 'lowpaymentfee.com':43,229 'mani':232 'maximum':103 'metadata':194 'network':97 'no-api-key' 'object':204 'openapi':185 'paid':83 'paramet':208 'part':40 'path':226 'pay':6,23 'pay-per-cal':5,22 'pay-per-call API' 'pay-per-request' 'payment':91,144,152,176 'per':7,24,85,106,132 'per-request':84 'platform':44 'post':81,210 'price':129 'product':257 'proper':170 'protocol':90 'provid':155 'purpos':217 'question':247 'rais':246 'rate':158 'record':73 'request':86,133 'request/response':188 'requir':105,141 'resourc':62,254 'return':168 'review':2,19,67,72,203,219 'schema':189 'serv':65 'settl':93 'singl':71 'site':125,230 'sole':222 'span':52 'spars':181 'spec':186 'specif':61,237 'unit':112 'url':225 'usd':121 'usdc':14,31,99,114 'usdc-base-network' 'use':87,98 'via':9,26,79 'whether':249 'without':175 'x':151 'x-payment':150 'x402':10,27,49,89,149,192 'x402 paid endpoint' 'x402-enabled':48 'x402-payment'","prices":[{"id":"e896bf63-5acc-4435-93ea-d2f93b304a16","listingId":"48d341f9-dad3-4e18-acce-876272689c91","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/reviews/6","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:19.924Z"}],"sources":[{"listingId":"48d341f9-dad3-4e18-acce-876272689c91","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/reviews/6","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:19.924Z","lastSeenAt":"2026-04-23T16:08:14.747Z"}],"details":{"listingId":"48d341f9-dad3-4e18-acce-876272689c91","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/reviews/6 \\\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 402 challenge with maxAmountRequired of 20000 base units of USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/6"},{"claim":"USDC contract address on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/6"},{"claim":"The site advertises $0.02 per request flat pricing with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"The homepage lists endpoints in Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories but does not list an HR reviews endpoint","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving HR review data on a per-request payment basis","Integrating pay-per-call HR data into agent workflows","Demonstrating x402 protocol payment flows"],"bestFor":["Agents needing on-demand HR review data without subscription commitments","Developers experimenting with x402 payment protocol on Base","Low-volume, pay-as-you-go data access"],"notFor":["High-volume bulk HR data retrieval (no documented batch endpoints)","Users who need detailed API documentation or guaranteed SLAs","Applications requiring non-crypto payment methods"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:09.872Z"},"updatedAt":"2026-04-23T16:08:14.747Z"}}