{"id":"c0ce00af-f525-48ab-8ee9-4eb6737292dd","shortId":"UgPdcF","kind":"x402","title":"Pay-per-call HR reviews endpoint on Base via x402 — $0.02 per request in USDC.","tagline":"Pay-per-call HR reviews endpoint on Base via x402 — $0.02 per request in USDC.","description":"This endpoint at `/api/v1/hr/reviews/37` is part of the lowpaymentfee.com platform, a collection of x402-gated APIs spanning data analytics, AI/ML, finance, infrastructure, and more. Each endpoint charges $0.02 per request, settled in USDC on the Base network, with no API keys, no rate limits, and no commitments required.\n\nThe specific resource `/api/v1/hr/reviews/37` appears to serve HR review data (likely a single review record identified by ID 37), though it is not listed among the advertised API categories on the site's landing page. The x402 challenge confirms the endpoint is live, accepting POST requests and requiring an exact payment of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) on the Base network. The response MIME type is `application/json`.\n\nBecause this particular endpoint is not featured in the provider's public API catalog and no documentation, request/response schema, or example payloads are available, the exact data structure returned is unknown. The broader platform advertises categories like Data & Analytics, AI & ML, Finance & Web3, and Infrastructure utilities, all at the same $0.02 price point. The endpoint follows the x402 protocol (version 1) with a 300-second payment timeout.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-call","hr-data","json-response","no-api-key"],"categories":["data","hr"],"synonyms":["HR reviews API","human resources review","employee review data","x402 paid API","lowpaymentfee","Base USDC API","pay-per-request API"],"warnings":["This specific endpoint (/api/v1/hr/reviews/37) is not listed in the provider's public API catalog — its purpose and response schema are unverified.","No request or response schema is available; the data structure is entirely unknown.","The /api, /pricing, and /README pages returned only a 'Connect wallet' prompt with no useful documentation.","Hardcoded resource ID (37) suggests this may be a single fixed record rather than a parameterized endpoint."],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/reviews/37","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/37","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, but this specific path (/api/v1/hr/reviews/37) is not documented on the provider's site, has no schema, no examples, and no description beyond the generic 'Premium API Access' label. The actual data returned is 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'0.02':12,28,61,140,207 '000':135 '1':217 '20':134 '300':220 '37':100 '6':145 'Base USDC API' 'HR reviews API' 'accept':125 'advertis':108,191 'ai':196 'ai/ml':53 'among':106 'analyt':52,195 'api':49,73,109,169 'appear':86 'application/json':156 'avail':180 'base':9,25,69,136,149 'broader':189 'call':4,20 'catalog':170 'categori':110,192 'challeng':119 'charg':60 'collect':44 'commit':80 'confirm':120 'data':51,91,183,194 'decim':146 'document':173 'employee review data' 'endpoint':7,23,34,59,122,160,211 'exact':131,182 'exampl':177 'featur':163 'financ':54,198 'follow':212 'gate':48 'hr':5,21,89 'hr-data' 'human resources review' 'id':99 'identifi':97 'infrastructur':55,201 'json-response' 'key':74 'land':115 'like':92,193 'limit':77 'list':105 'live':124 'lowpaymentfee' 'lowpaymentfee.com':41 'mime':153 'ml':197 'network':70,150 'no-api-key' 'page':116 'part':38 'particular':159 'pay':2,18 'pay-per-cal':1,17 'pay-per-call' 'pay-per-request API' 'payload':178 'payment':132,222 'per':3,13,19,29,62 'platform':42,190 'point':209 'post':126 'price':208 'protocol':215 'provid':166 'public':168 'rate':76 'record':96 'request':14,30,63,127 'request/response':174 'requir':81,129 'resourc':84 'respons':152 'return':185 'review':6,22,90,95 'schema':175 'second':221 'serv':88 'settl':64 'sinc':142 'singl':94 'site':113 'span':50 'specif':83 'structur':184 'though':101 'timeout':223 'type':154 'unit':137 'unknown':187 'usd':141 'usdc':16,32,66,139,143 'usdc-base' 'use':144 'util':202 'version':216 'via':10,26 'web3':199 'x402':11,27,47,118,214 'x402 paid API' 'x402-gated':46 'x402-payment'","prices":[{"id":"d7d36e96-77a1-4db3-a695-b23b0c50901f","listingId":"c0ce00af-f525-48ab-8ee9-4eb6737292dd","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/37","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:20.067Z"}],"sources":[{"listingId":"c0ce00af-f525-48ab-8ee9-4eb6737292dd","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/reviews/37","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:20.067Z","lastSeenAt":"2026-04-23T16:08:14.947Z"}],"details":{"listingId":"c0ce00af-f525-48ab-8ee9-4eb6737292dd","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/reviews/37 \\\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 provider advertises $0.02 per request with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"The x402 challenge shows maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base with a 300-second timeout.","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/37"},{"claim":"The provider lists API categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure.","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving HR review records programmatically with per-call payment","Integrating employee review data into agent workflows without API key management","Accessing on-demand HR data with crypto micropayments"],"bestFor":["Agents or apps needing one-off HR review lookups without subscription overhead","Developers experimenting with x402 pay-per-call protocols","Crypto-native workflows that can settle USDC on Base"],"notFor":["Bulk retrieval of large HR datasets (no documented batch endpoint)","Users who need detailed API documentation or guaranteed SLAs","Non-crypto payment workflows (only USDC on Base is accepted)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:09.641Z"},"updatedAt":"2026-04-23T16:08:14.947Z"}}