{"id":"519f9f4b-94c4-4088-a7ca-2bc0b5ff7425","shortId":"5kKfpD","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/39` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs settled via the x402 protocol on the Base network using USDC. The specific endpoint appears to serve HR review data (resource ID 39), though the exact response schema and input parameters are not documented in the crawled material. The platform advertises a flat $0.02 per request across all its endpoints, and the x402 challenge confirms a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02.\n\nThe platform emphasizes simplicity: no API keys, no rate limits, no commitments, and instant access. Payment is handled entirely through the x402 payment header using USDC on Base (contract 0x8335…2913). The endpoint accepts POST requests and returns application/json. However, there is no OpenAPI spec, no documented request body schema, and no example responses available from the crawl. The specific nature of the \"HR reviews\" data — whether it's employee performance reviews, company reviews, or something else — is unclear from the available material.\n\nlowpaymentfee.com also hosts endpoints for analytics, AI/ML inference (sentiment, summarization, classification, embeddings), finance/crypto data, and utility services, all at the same $0.02 price point.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","hr-reviews","pay-per-request","no-api-key","json-response"],"categories":["data"],"synonyms":["HR reviews API","employee reviews","human resources data","review endpoint","x402 HR API","lowpaymentfee HR"],"warnings":["No OpenAPI or schema documentation available for this endpoint","The meaning of 'HR reviews' and resource ID 39 is undocumented — unclear what data is returned","No example request or response bodies available","The /api, /pricing, and /README pages all returned only a 'Connect wallet' prompt with no useful content"],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/reviews/39","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/39","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 with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema documentation, no example payloads, and the nature of the 'HR reviews' data is unexplained. This is effectively a stub listing with confirmed 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'0.02':12,28,97,122,227 '000':113 '0x8335':152 '20':112 '2913':153 '39':76 '6':118 'HR reviews API' 'accept':156 'access':137 'across':100 'advertis':94 'ai/ml':212 'also':207 'analyt':211 'api':53,128 'appear':68 'application/json':161 'avail':177,204 'base':9,25,61,114,150 'base-network' 'bodi':171 'broad':46 'call':4,20 'catalog':47 'challeng':107 'classif':216 'commit':134 'compani':195 'confirm':108 'contract':151 'crawl':90,180 'data':73,188,219 'decim':119 'document':87,169 'els':199 'embed':217 'emphas':125 'employe':192 'employee reviews' 'endpoint':7,23,34,67,103,155,209 'entir':141 'equal':121 'exact':79 'exampl':175 'finance/crypto':218 'flat':96 'handl':140 'header':146 'host':208 'howev':162 'hr':5,21,71,186 'hr-reviews' 'human resources data' 'id':75 'infer':213 'input':83 'instant':136 'json-response' 'key':129 'limit':132 'lowpaymentfee HR' 'lowpaymentfee.com':41,206 'materi':91,205 'maxamountrequir':110 'natur':183 'network':62 'no-api-key' 'offer':44 'openapi':166 'paramet':84 'part':38 'pay':2,18,50 'pay-per-cal':1,17 'pay-per-request':49 'payment':138,145 'per':3,13,19,29,51,98 'perform':193 'platform':42,93,124 'point':229 'post':157 'price':228 'protocol':58 'rate':131 'request':14,30,52,99,158,170 'resourc':74 'respons':80,176 'return':160 'review':6,22,72,187,194,196 'review endpoint' 'schema':81,172 'sentiment':214 'serv':70 'servic':222 'settl':54 'simplic':126 'someth':198 'spec':167 'specif':66,182 'summar':215 'though':77 'unclear':201 'unit':115 'usdc':16,32,64,117,148 'usdc-settlement' 'use':63,147 'util':221 'via':10,26,55 'whether':189 'x402':11,27,57,106,144 'x402 HR API' 'x402-payment'","prices":[{"id":"06bb07f1-d4d7-435e-a215-413d54e1f551","listingId":"519f9f4b-94c4-4088-a7ca-2bc0b5ff7425","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/39","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:19.739Z"}],"sources":[{"listingId":"519f9f4b-94c4-4088-a7ca-2bc0b5ff7425","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/reviews/39","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:19.739Z","lastSeenAt":"2026-04-23T17:32:46.295Z"}],"details":{"listingId":"519f9f4b-94c4-4088-a7ca-2bc0b5ff7425","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/reviews/39 \\\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 x402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/39"},{"claim":"The platform advertises $0.02 per request with no API keys, no rate limits, and instant access","source_url":"https://lowpaymentfee.com"},{"claim":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/39"}],"useCases":["Retrieving HR review data for a specific resource (ID 39)","Integrating HR review information into automated workflows","Agent-driven access to human resources review records"],"bestFor":["Agents needing on-demand HR review data without API key management","Micropayment-based access to HR data on Base network","Developers exploring x402 pay-per-call patterns"],"notFor":["Bulk HR data exports requiring thousands of records at once","Use cases requiring well-documented request/response schemas before integration","Users who need fiat-only payment rails"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:10.087Z"},"updatedAt":"2026-04-23T17:32:46.295Z"}}