{"id":"398c1772-0d65-47f6-9962-ac8d8dec4be3","shortId":"GPUSTM","kind":"x402","title":"HR reviews data endpoint, pay-per-request via x402 on Base (USDC).","tagline":"HR reviews data endpoint, pay-per-request via x402 on Base (USDC).","description":"This endpoint at `/api/v1/hr/reviews/28` is part of the lowpaymentfee.com platform, a collection of pay-per-call APIs settled via the x402 protocol on the Base network using USDC. The specific resource appears to serve HR review data (likely a single review record identified by ID 28). The platform advertises a uniform $0.02 per request pricing model across all its endpoints, with no API keys, no rate limits, and instant access.\n\nThe x402 challenge confirms the endpoint is live and accepts POST requests. Payment is settled on-chain via USDC (contract `0x8335...2913`) on Base, with a max amount of 20,000 base units (i.e., $0.02 given USDC's 6 decimals). The endpoint returns `application/json` responses. The platform also offers endpoints spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/crypto data, and infrastructure utilities — all at the same $0.02 per-call price point.\n\nNote that this specific endpoint (`/hr/reviews/28`) is not listed on the provider's landing page among the advertised API categories, so its exact response schema and data source are unclear. No OpenAPI spec, detailed documentation, or example responses were found during the crawl. Treat this as a data retrieval endpoint with limited documentation.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","hr-data","json-response","pay-per-request","no-api-key"],"categories":["data"],"synonyms":["HR review API","employee review data","human resources API","x402 paid endpoint","lowpaymentfee API","Base USDC API","pay-per-call data"],"warnings":["Endpoint /api/v1/hr/reviews/28 is not listed among the provider's advertised APIs on the landing page","No OpenAPI spec or detailed documentation available","No example request or response schema found — actual response content is unknown","The provider's /api, /pricing, and /README pages returned only a 'Connect wallet' prompt with no useful content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/reviews/28","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/28","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), but this specific HR reviews endpoint is not listed on the provider's landing page, has no documentation, no OpenAPI schema, no example request/response, and no description of what data it returns. Effectively a stub with verified 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'/hr/reviews/28':179 '0.02':79,133,168 '000':129 '0x8335':119 '20':128 '28':73 '2913':120 '6':137 'Base USDC API' 'HR review API' 'accept':107 'access':97 'across':84 'advertis':76,191 'ai/ml':152 'also':146 'among':189 'amount':126 'analysi':155 'analyt':151 'api':44,90,192 'appear':59 'application/json':142 'base':12,25,52,122,130 'base-network' 'call':43,171 'categori':193 'chain':115 'challeng':100 'classif':157 'collect':38 'confirm':101 'contract':118 'crawl':216 'data':3,16,64,150,160,200,221 'decim':138 'detail':207 'document':208,226 'embed':158 'employee review data' 'endpoint':4,17,28,87,103,140,148,178,223 'exact':196 'exampl':210 'finance/crypto':159 'found':213 'given':134 'hr':1,14,62 'hr-data' 'human resources API' 'i.e':132 'id':72 'identifi':70 'infer':153 'infrastructur':162 'instant':96 'json-response' 'key':91 'land':187 'like':65 'limit':94,225 'list':182 'live':105 'lowpaymentfee API' 'lowpaymentfee.com':35 'max':125 'model':83 'network':53 'no-api-key' 'note':174 'offer':147 'on-chain':113 'openapi':205 'page':188 'part':32 'pay':6,19,41 'pay-per-cal':40 'pay-per-call data' 'pay-per-request':5,18 'payment':110 'per':7,20,42,80,170 'per-cal':169 'platform':36,75,145 'point':173 'post':108 'price':82,172 'protocol':49 'provid':185 'rate':93 'record':69 'request':8,21,81,109 'resourc':58 'respons':143,197,211 'retriev':222 'return':141 'review':2,15,63,68 'schema':198 'sentiment':154 'serv':61 'settl':45,112 'singl':67 'sourc':201 'span':149 'spec':206 'specif':57,177 'summar':156 'treat':217 'unclear':203 'uniform':78 'unit':131 'usdc':13,26,55,117,135 'usdc-settlement' 'use':54 'util':163 'via':9,22,46,116 'x402':10,23,48,99 'x402 paid endpoint' 'x402-payment'","prices":[{"id":"3b2a7675-3aee-4294-9138-c91a211f54a8","listingId":"398c1772-0d65-47f6-9962-ac8d8dec4be3","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/28","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:20.181Z"}],"sources":[{"listingId":"398c1772-0d65-47f6-9962-ac8d8dec4be3","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/reviews/28","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:20.181Z","lastSeenAt":"2026-04-23T14:32:00.315Z"}],"details":{"listingId":"398c1772-0d65-47f6-9962-ac8d8dec4be3","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/reviews/28 \\\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":"Platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/28"},{"claim":"USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/28"}],"useCases":["Retrieving HR review records programmatically","Integrating employee review data into HR dashboards","Agent-driven data retrieval with micropayments"],"bestFor":["Developers needing on-demand HR data without subscription commitments","AI agents that can settle x402 payments on Base","Prototyping pay-per-call data access patterns"],"notFor":["Bulk HR data exports (single-record endpoint, no batch mode documented)","Users without USDC on Base network for payment"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:09.429Z"},"updatedAt":"2026-04-23T14:32:00.315Z"}}