{"id":"95858bd2-4c97-4cd0-90b9-786cb6b1a784","shortId":"Bzcmtt","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/18` is part of the lowpaymentfee.com platform, which offers a broad catalog 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 18), though the exact response schema is not documented. The endpoint accepts POST requests and returns `application/json`.\n\nPricing is $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02), paid directly on-chain to the provider's wallet. There are no API keys, no rate limits, and no subscription commitments — each call is individually settled via the x402 payment header. The x402 challenge is live and well-formed, advertising x402 version 1 with a 300-second payment timeout.\n\nThe broader lowpaymentfee.com platform lists endpoints across data & analytics, AI/ML (sentiment, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all at the same $0.02/request price point. However, this specific listing covers only the HR reviews endpoint. Documentation is minimal: there is no OpenAPI spec, no request/response schema beyond the x402 challenge metadata, and the crawled docs and pricing pages returned only a wallet-connect prompt with no additional detail.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","hr-data","pay-per-call","no-api-key","json-response"],"categories":["data"],"synonyms":["HR review API","employee review data","human resources API","x402 paid API","lowpaymentfee","per-request payment API","Base USDC API"],"warnings":["No OpenAPI or schema documentation available — request body and response format are unknown.","The specific data returned by /api/v1/hr/reviews/18 is undocumented; 'HR reviews' is inferred from the URL path only.","Most crawled pages (pricing, README, /api) returned no meaningful content beyond a wallet-connect prompt.","The broader platform lists many endpoint categories but none have published documentation."],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/reviews/18","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/18","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The x402 challenge is live and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI spec, no documented request body or response schema, no examples, and the endpoint's actual data content (HR reviews) is entirely undocumented. The crawled pages beyond the homepage returned only wallet-connect prompts with no useful 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'/request':201 '0.02':12,28,101,113,200 '000':105 '1':158 '18':82 '20':104 '300':161 '6':111 'Base USDC API' 'HR review API' 'accept':93 'across':171 'addit':246 'advertis':155 'ai/ml':174 'analyt':173 'api':53,127 'appear':68 'application/json':98 'base':9,25,61,106 'base-network' 'beyond':225 'broad':46 'broader':166 'call':4,20,52,137 'catalog':47 'chain':118 'challeng':148,228 'classif':177 'commit':135 'connect':242 'convers':194 'cover':208 'crawl':232 'data':73,172 'decim':112 'detail':247 'direct':115 'doc':233 'document':90,214 'embed':178 'employee review data' 'endpoint':7,23,34,92,170,213 'estim':188 'exact':85 'exchang':183 'feed':182 'financ':179 'form':154 'gas':187 'generat':195 'geocod':192 'header':145 'howev':204 'hr':5,21,71,211 'hr-data' 'human resources API' 'id':81 'identifi':79 'individu':139 'infrastructur':190 'json-response' 'key':128 'like':74 'limit':131 'list':169,207 'live':150 'lowpaymentfee' 'lowpaymentfee.com':41,167 'metadata':229 'minim':216 'network':62 'no-api-key' 'offer':44 'on-chain':116 'openapi':220 'page':236 'paid':114 'part':38 'pay':2,18,50 'pay-per-cal':1,17,49 'pay-per-call' 'payment':144,163 'per':3,13,19,29,51,102 'per-request payment API' 'platform':42,168 'point':203 'post':94 'price':99,181,202,235 'prompt':243 'protocol':58 'provid':121 'quot':186 'rate':130,184 'record':78 'request':14,30,95,103 'request/response':223 'resourc':67 'respons':86 'return':97,237 'review':6,22,72,77,212 'schema':87,224 'second':162 'sentiment':175 'serv':70 'settl':54,140 'singl':76 'spec':221 'specif':66,206 'subscript':134 'summar':176 'though':83 'timeout':164 'token':185 'unit':107 'usdc':16,32,64,109 'usdc-settlement' 'use':63 'util':191 'valid':193 'version':157 'via':10,26,55,141 'wallet':123,241 'wallet-connect':240 'web3':180 'well':153 'well-form':152 'x402':11,27,57,143,147,156,227 'x402 paid API' 'x402-payment'","prices":[{"id":"98e8deed-23b6-4fae-b8ce-383f5194e470","listingId":"95858bd2-4c97-4cd0-90b9-786cb6b1a784","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/18","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:19.596Z"}],"sources":[{"listingId":"95858bd2-4c97-4cd0-90b9-786cb6b1a784","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/reviews/18","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:19.596Z","lastSeenAt":"2026-04-23T17:32:46.167Z"}],"details":{"listingId":"95858bd2-4c97-4cd0-90b9-786cb6b1a784","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/reviews/18 \\\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 in USDC on Base network","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/18"},{"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":"USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/18"}],"useCases":["Retrieving HR review records programmatically with per-call payment","Integrating employee review data into agent workflows without subscription overhead","Demonstrating x402 micropayment protocol usage on Base"],"bestFor":["Agents or bots that need on-demand HR data without managing API keys","Developers experimenting with x402 pay-per-call protocols","Low-volume consumers who prefer pay-as-you-go over subscriptions"],"notFor":["High-volume bulk HR data retrieval where per-call costs add up","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":"2026-02-17T23:13:10.326Z"},"updatedAt":"2026-04-23T17:32:46.167Z"}}