{"id":"9e65904a-99ed-4e04-9549-be7b2abe31f7","shortId":"Ksmt4j","kind":"x402","title":"Pay-per-call HR reviews endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call HR reviews endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides access to an HR reviews resource (specifically review ID 20) via the x402 payment protocol. It is part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance, crypto, infrastructure utilities, and more — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/hr/reviews/20` accepts POST requests and returns JSON. Payment is handled inline via the x402 protocol: callers attach an `X-PAYMENT` header containing a signed payment proof for up to 20,000 base units of USDC (i.e., $0.02, since USDC uses 6 decimals). No API keys, accounts, or rate limits are advertised — access is gated purely by micropayment.\n\nThe platform's landing page lists endpoints across categories (Data & Analytics, AI & ML, Finance & Web3, Infrastructure) but does not provide detailed documentation, request/response schemas, or example payloads for any individual endpoint. The HR reviews endpoint is not listed on the homepage, making its exact data source and response format unclear. The x402 challenge confirms the endpoint is live and accepting payment challenges.","tags":[],"capabilities":["x402-payment","usdc-micropayment","base-network","hr-reviews","pay-per-call","no-api-key","json-response"],"categories":["data","hr"],"synonyms":["HR reviews API","employee reviews","human resources data","x402 micropayment API","pay-per-request API","lowpaymentfee","USDC API","Base network API"],"warnings":["No API documentation or OpenAPI spec available for this endpoint","The /api/v1/hr/reviews/20 path is not listed on the provider's homepage — its data source and purpose are unclear","No request body schema or response schema documented anywhere","No examples of successful responses available","The broader platform lists many endpoints but none have detailed docs"],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/reviews/20","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/20","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). However, there is no documentation, no OpenAPI schema, no request/response examples, and the HR reviews endpoint is not even listed on the provider's homepage. The actual data returned is 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'/request':17,34 '0.02':16,33,85,136 '000':130 '20':49,129 '6':140 'Base network API' 'HR reviews API' 'USDC API' 'accept':100,216 'access':40,151 'account':145 'across':164 'advertis':150 'ai':168 'ai/ml':74 'analyt':73,167 'api':69,143 'attach':115 'base':9,26,94,131 'base-network' 'broader':60 'call':4,21,68 'caller':114 'categori':165 'challeng':209,218 'confirm':210 'contain':121 'crypto':77 'data':72,166,201 'decim':141 'detail':177 'document':178 'dozen':63 'employee reviews' 'endpoint':7,24,36,70,98,163,187,191,212 'exact':200 'exampl':182 'financ':76,170 'format':205 'gate':153 'handl':108 'header':120 'homepag':197 'hr':5,22,43,189 'hr-reviews' 'human resources data' 'i.e':135 'id':48 'individu':186 'infer':75 'infrastructur':78,172 'inlin':109 'json':105 'json-response' 'key':144 'land':160 'limit':148 'list':162,194 'live':214 'lowpaymentfee' 'lowpaymentfee.com':38 'make':198 'micropay':156 'ml':169 'network':95 'no-api-key' 'offer':62 'page':161 'part':57 'pay':2,19,66 'pay-per-cal':1,18,65 'pay-per-call' 'pay-per-request API' 'payload':183 'payment':53,106,119,124,217 'per':3,20,67,86 'platform':61,158 'post':101 'price':83 'proof':125 'protocol':54,113 'provid':39,176 'pure':154 'rate':147 'request':87,102 'request/response':179 'resourc':45 'respons':204 'return':104 'review':6,23,44,47,190 'schema':180 'settl':12,29,89 'sign':123 'sinc':137 'sourc':202 'span':71 'specif':46,97 'unclear':206 'unit':132 'usdc':14,31,91,134,138 'usdc-micropayment' 'use':139 'util':79 'via':10,27,50,110 'web3':171 'x':118 'x-payment':117 'x402':11,28,52,112,208 'x402 micropayment API' 'x402-payment'","prices":[{"id":"fb04284d-45da-4fb9-93dd-e4112e4b1c6d","listingId":"9e65904a-99ed-4e04-9549-be7b2abe31f7","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/20","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:19.644Z"}],"sources":[{"listingId":"9e65904a-99ed-4e04-9549-be7b2abe31f7","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/reviews/20","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:19.644Z","lastSeenAt":"2026-04-23T17:32:46.219Z"}],"details":{"listingId":"9e65904a-99ed-4e04-9549-be7b2abe31f7","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/reviews/20 \\\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 x402 challenge requesting 20,000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/20"},{"claim":"USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/20"},{"claim":"Platform pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The homepage lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories but does not list HR review endpoints","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving HR review data for a specific review record","Integrating pay-per-call HR data into agent workflows","Accessing structured review information without API key management"],"bestFor":["Agents needing on-demand HR review data with no subscription","Developers experimenting with x402 micropayment-gated APIs","Workflows requiring keyless, pay-as-you-go data access on Base"],"notFor":["Bulk HR data retrieval (no documented batch endpoints)","Users who need detailed API documentation or OpenAPI specs before integrating","Non-crypto users without access to USDC on Base"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:10.221Z"},"updatedAt":"2026-04-23T17:32:46.219Z"}}