{"id":"52d1ff37-2928-4991-be0c-a051de0be2a6","shortId":"AmFbtz","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/2` 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, subscriptions, or rate limits are required — callers simply attach an x402 payment header to each POST request.\n\nThe specific endpoint probed (`/api/v1/hr/reviews/2`) appears to serve HR review data, though the provider's landing page does not list it among its featured API categories (Data & Analytics, AI & ML, Finance & Web3, Infrastructure). The x402 challenge confirms the endpoint is live, accepts the `exact` payment scheme on Base, and returns `application/json`. The USDC asset address (`0x8335…2913`) matches the canonical Base USDC contract. The maximum amount required is 20,000 base units, which at 6 decimals equals $0.02.\n\nDocumentation is minimal — the provider's site offers only a high-level catalog with no request/response schemas, parameter descriptions, or example payloads for any endpoint. The `/api`, `/pricing`, and `/README` pages all resolve to a bare \"Connect wallet\" prompt with no additional content. Without documentation or sample responses, the exact shape of the HR reviews data returned by this endpoint is unknown.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","hr-reviews","json-response","no-api-key","no-rate-limit"],"categories":["data","hr"],"synonyms":["human resources reviews","employee reviews","HR data API","pay-per-call API","x402 API","lowpaymentfee","USDC micropayment API","Base network API"],"warnings":["No API documentation, request parameters, or response schema available for this endpoint.","The /api/v1/hr/reviews/2 endpoint is not listed among the provider's advertised API categories — its purpose and data contents are unclear.","The /api, /pricing, and /README pages return only a 'Connect wallet' prompt with no useful content.","Without example responses, the structure and reliability of returned data cannot be verified."],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/reviews/2","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/2","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.350","qualityRationale":"The endpoint is confirmed live via a valid 402 challenge with clear pricing and asset details, but there is no documentation, no request/response schema, no examples, and the specific HR reviews endpoint is not even listed on the provider's own landing page. Effectively a stub 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'/api/v1/hr/reviews/2':39,110 '/pricing':212 '/readme':214 '0.02':12,28,83,183 '000':175 '0x8335':161 '20':174 '2913':162 '6':180 'Base network API' 'HR data API' 'USDC micropayment API' 'accept':147 'addit':226 'address':160 'ai':134 'ai/ml':60 'among':127 'amount':171 'analyt':59,133 'api':56,87,130 'appear':111 'application/json':156 'asset':159 'attach':97 'bare':220 'base':9,25,72,153,166,176 'base-network' 'broad':49 'call':4,20,67 'caller':95 'canon':165 'catalog':50,197 'categori':131 'challeng':141 'coin':77 'confirm':142 'connect':221 'content':227 'contract':168 'data':58,116,132,240 'decim':181 'descript':203 'document':184,229 'employee reviews' 'enabl':36 'endpoint':7,23,37,108,144,209,244 'equal':182 'exact':149,234 'exampl':205 'featur':129 'financ':61,136 'flat':80 'header':101 'high':195 'high-level':194 'hr':5,21,114,238 'hr-reviews' 'human resources reviews' 'infrastructur':62,138 'json-response' 'key':88 'land':121 'level':196 'limit':92 'list':125 'live':146 'lowpaymentfee' 'lowpaymentfee.com':44 'match':163 'maximum':170 'minim':186 'ml':135 'network':73 'no-api-key' 'no-rate-limit' 'offer':47,191 'page':122,215 'paramet':202 'part':41 'pay':2,18,53 'pay-per-cal':1,17 'pay-per-call API' 'pay-per-request':52 'payload':206 'payment':100,150 'per':3,13,19,29,54,84 'platform':45 'post':104 'probe':109 'prompt':223 'provid':119,188 'rate':81,91 'request':14,30,55,85,105 'request/response':200 'requir':94,172 'resolv':217 'respons':232 'return':155,241 'review':6,22,115,239 'sampl':231 'schema':201 'scheme':151 'serv':113 'settl':69 'shape':235 'simpli':96 'site':190 'span':57 'specif':107 'subscript':89 'though':117 'unit':177 'unknown':246 'usd':76 'usdc':16,32,75,158,167 'usdc-settlement' 'use':74 'util':63 'via':10,26 'wallet':222 'web3':137 'without':228 'x402':11,27,35,99,140 'x402 API' 'x402-enabled':34 'x402-payment'","prices":[{"id":"77713a9d-e4ea-4969-95c3-4049d7a55c8d","listingId":"52d1ff37-2928-4991-be0c-a051de0be2a6","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/2","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:19.446Z"}],"sources":[{"listingId":"52d1ff37-2928-4991-be0c-a051de0be2a6","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/reviews/2","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:19.446Z","lastSeenAt":"2026-04-23T19:02:14.037Z"}],"details":{"listingId":"52d1ff37-2928-4991-be0c-a051de0be2a6","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/reviews/2 \\\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 challenge with maxAmountRequired of 20000 base units in USDC on Base network.","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/2"},{"claim":"The 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":"USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 is the canonical Base USDC contract.","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/2"}],"useCases":["Retrieving HR review data on demand without subscription commitments","Integrating pay-per-call HR data into agent workflows via x402","Programmatic access to employee review records settled in USDC on Base"],"bestFor":["Agents or applications needing on-demand HR review data with crypto micropayments","Developers exploring x402 payment-gated APIs on Base","Low-volume or sporadic access patterns where per-call pricing is preferable to subscriptions"],"notFor":["High-volume bulk data retrieval where per-call costs add up quickly","Users who need detailed API documentation or guaranteed SLAs before integrating","Non-crypto workflows that require traditional billing (credit card, invoicing)"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:10.551Z"},"updatedAt":"2026-04-23T19:02:14.037Z"}}