{"id":"6c1bc27f-1ace-4aa7-9522-ccbf302f980a","shortId":"r4jzXA","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 x402-enabled endpoint at `/api/v1/hr/reviews/42` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs spanning data analytics, AI/ML, finance, infrastructure utilities, and more. Each call is settled on the Base network using USDC (USD Coin) at a flat rate of $0.02 per request. No API keys, rate limits, or upfront commitments are required — payment is handled inline via the x402 protocol.\n\nThe specific endpoint probed (`/api/v1/hr/reviews/42`) is listed under \"Premium API Access\" and appears to serve HR review data for a specific resource (ID 42). The endpoint accepts POST requests and returns `application/json`. The x402 challenge confirms the endpoint is live, advertising a max amount of 20,000 base units of USDC (6 decimals), which equals $0.02. Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base.\n\nDocumentation is minimal — the provider's landing page lists available endpoints and pricing but provides no request/response schemas, parameter descriptions, or usage examples. The `/api`, `/pricing`, and `/README` pages all resolve to a \"Connect wallet\" prompt with no additional content. Because of this, the exact input parameters and response shape for the HR reviews endpoint are unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","hr-data","json-response","no-api-key","no-rate-limit"],"categories":["data","hr"],"synonyms":["HR reviews API","employee review data","human resources API","pay-per-call API","x402 API","lowpaymentfee","USDC micropayment API","Base network API"],"warnings":["No request or response schema available — input parameters and output format are entirely unknown.","The endpoint path references a hardcoded ID (42); it is unclear whether other IDs are supported or how to discover them.","Provider documentation pages (/api, /pricing, /README) return only 'Connect wallet' with no useful content.","The 'HR reviews' category does not appear in the provider's own landing page API listing, making it unclear what data this endpoint actually serves."],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/reviews/42","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/42","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. However, there is no documentation for request parameters, response schema, or what 'HR reviews' data actually contains. The provider site offers only a listing page and wallet-connect prompts with no further 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'/api/v1/hr/reviews/42':39,108 '/pricing':193 '/readme':195 '0.02':12,28,83,159 '000':150 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':165 '20':149 '42':127 '6':155 'Base network API' 'HR reviews API' 'USDC micropayment API' 'accept':130 'access':114 'addit':206 'address':164 'advertis':144 'ai/ml':60 'amount':147 'analyt':59 'api':56,87,113 'appear':116 'application/json':135 'avail':177 'base':9,25,72,151,167 'base-network' 'broad':49 'call':4,20,67 'catalog':50 'challeng':138 'coin':77 'commit':93 'confirm':139 'connect':201 'content':207 'data':58,121 'decim':156 'descript':187 'document':168 'employee review data' 'enabl':36 'endpoint':7,23,37,106,129,141,178,222 'equal':158 'exact':212 'exampl':190 'financ':61 'flat':80 'handl':98 'hr':5,21,119,220 'hr-data' 'human resources API' 'id':126 'infrastructur':62 'inlin':99 'input':213 'json-response' 'key':88 'land':174 'limit':90 'list':110,176 'live':143 'lowpaymentfee' 'lowpaymentfee.com':44 'max':146 'minim':170 'network':73 'no-api-key' 'no-rate-limit' 'offer':47 'page':175,196 'paramet':186,214 'part':41 'pay':2,18,53 'pay-per-cal':1,17 'pay-per-call API' 'pay-per-request':52 'payment':96,160 'per':3,13,19,29,54,84 'platform':45 'post':131 'premium':112 'price':180 'probe':107 'prompt':203 'protocol':103 'provid':172,182 'rate':81,89 'request':14,30,55,85,132 'request/response':184 'requir':95 'resolv':198 'resourc':125 'respons':216 'return':134 'review':6,22,120,221 'schema':185 'sent':162 'serv':118 'settl':69 'shape':217 'span':57 'specif':105,124 'unit':152 'unknown':224 'upfront':92 'usag':189 'usd':76 'usdc':16,32,75,154 'usdc-settlement' 'use':74 'util':63 'via':10,26,100 'wallet':202 'x402':11,27,35,102,137 'x402 API' 'x402-enabled':34 'x402-payment'","prices":[{"id":"faf19076-5c53-47f3-9af8-ff4455633592","listingId":"6c1bc27f-1ace-4aa7-9522-ccbf302f980a","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/42","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:20.102Z"}],"sources":[{"listingId":"6c1bc27f-1ace-4aa7-9522-ccbf302f980a","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/reviews/42","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:20.102Z","lastSeenAt":"2026-04-23T15:02:14.481Z"}],"details":{"listingId":"6c1bc27f-1ace-4aa7-9522-ccbf302f980a","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/reviews/42 \\\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 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/42"},{"claim":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/42"},{"claim":"Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"Available API categories include Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving HR review data for a specific employee or review ID","Integrating pay-per-call HR data into agent workflows without API key management","Programmatic access to HR review records settled via crypto micropayments"],"bestFor":["Agents or applications needing on-demand HR review data without subscription overhead","Developers experimenting with x402 pay-per-request patterns on Base","Low-volume or sporadic access to HR data where flat per-call pricing is economical"],"notFor":["High-volume bulk HR data retrieval where per-call costs would accumulate","Use cases requiring detailed API documentation, SDKs, or guaranteed SLAs","Applications that cannot settle payments in USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:09.629Z"},"updatedAt":"2026-04-23T15:02:14.481Z"}}