{"id":"582b1fc2-3711-4f67-9050-f9db7546a32d","shortId":"aauQww","kind":"x402","title":"Pay-per-call HR reviews endpoint on Base via x402, settled in USDC at $0.02/request.","tagline":"Pay-per-call HR reviews endpoint on Base via x402, settled in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides access to an HR reviews resource (specifically review ID 9) via the x402 payment protocol. It is part of a broader platform that offers dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance, crypto, infrastructure utilities, and more — all priced at $0.02 per request and settled in USDC on the Base network.\n\nThe specific endpoint `/api/v1/hr/reviews/9` accepts POST requests and returns JSON. Payment is handled inline via the x402 protocol: callers include an X-PAYMENT header with a signed payment voucher for up to 20,000 base units of USDC (i.e., $0.02) on Base. There are no API keys, no rate limits, and no subscription commitments — each call is independently paid. The payment is directed to address 0x1A2B…85F3 and the USDC contract used is 0x8335…2913 (the canonical Base USDC contract).\n\nThe endpoint's actual data content — HR reviews — is not documented in detail on the provider's site. The landing page lists categories like Data & Analytics, AI & ML, Finance & Web3, and Infrastructure, but does not explicitly list HR-related endpoints. This suggests the HR reviews endpoint may be a demo, test, or less-prominent offering. No request body schema or response schema is documented, so callers will need to experiment or contact the provider for details.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","hr-reviews","json-api","no-api-key","no-rate-limit"],"categories":["data","hr"],"synonyms":["HR review API","employee review","human resources API","pay-per-request API","x402 API","USDC micropayment API","lowpaymentfee"],"warnings":["No request or response schema documented for this endpoint","HR reviews endpoint not listed on the provider's landing page — may be a demo or test resource","No OpenAPI specification or detailed API documentation available","Endpoint path references a specific review ID (9); unclear if other IDs are valid or how to discover them"],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/reviews/9","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/9","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). However, there is no documented request/response schema, no OpenAPI spec, no examples, and the HR reviews category is not even listed on the provider's landing page. The actual data returned is 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'/request':17,34 '0.02':16,33,86,137 '000':131 '0x1a2b':163 '0x8335':171 '20':130 '2913':172 '85f3':164 '9':49 'HR review API' 'USDC micropayment API' 'accept':101 'access':40 'actual':181 'address':162 'ai':204 'ai/ml':75 'analyt':74,203 'api':70,143 'base':9,26,95,132,139,175 'base-network' 'bodi':237 'broader':60 'call':4,21,69,153 'caller':115,245 'canon':174 'categori':200 'commit':151 'contact':251 'content':183 'contract':168,177 'crypto':78 'data':73,182,202 'demo':228 'detail':190,255 'direct':160 'document':188,243 'dozen':64 'employee review' 'endpoint':7,24,36,71,99,179,218,224 'experi':249 'explicit':213 'financ':77,206 'handl':109 'header':121 'hr':5,22,43,184,216,222 'hr-relat':215 'hr-reviews' 'human resources API' 'i.e':136 'id':48 'includ':116 'independ':155 'infer':76 'infrastructur':79,209 'inlin':110 'json':106 'json-api' 'key':144 'land':197 'less':232 'less-promin':231 'like':201 'limit':147 'list':199,214 'lowpaymentfee' 'lowpaymentfee.com':38 'may':225 'ml':205 'need':247 'network':96 'no-api-key' 'no-rate-limit' 'offer':63,234 'page':198 'paid':156 'part':57 'pay':2,19,67 'pay-per-cal':1,18,66 'pay-per-call' 'pay-per-request API' 'payment':53,107,120,125,158 'per':3,20,68,87 'platform':61 'post':102 'price':84 'promin':233 'protocol':54,114 'provid':39,193,253 'rate':146 'relat':217 'request':88,103,236 'resourc':45 'respons':240 'return':105 'review':6,23,44,47,185,223 'schema':238,241 'settl':12,29,90 'sign':124 'site':195 'span':72 'specif':46,98 'subscript':150 'suggest':220 'test':229 'unit':133 'usdc':14,31,92,135,167,176 'usdc-settlement' 'use':169 'util':80 'via':10,27,50,111 'voucher':126 'web3':207 'x':119 'x-payment':118 'x402':11,28,52,113 'x402 API' 'x402-payment'","prices":[{"id":"fddeac17-4f14-4612-87d5-72f194292f2b","listingId":"582b1fc2-3711-4f67-9050-f9db7546a32d","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/9","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:19.827Z"}],"sources":[{"listingId":"582b1fc2-3711-4f67-9050-f9db7546a32d","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/reviews/9","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:19.827Z","lastSeenAt":"2026-04-23T16:08:14.650Z"}],"details":{"listingId":"582b1fc2-3711-4f67-9050-f9db7546a32d","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/reviews/9 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <signed-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 requesting up to 20,000 base units of USDC on Base (i.e., $0.02)","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/9"},{"claim":"The platform advertises $0.02/request pricing 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/9"}],"useCases":["Retrieving HR review data on a per-call payment basis","Integrating pay-per-use HR data into agent workflows","Testing x402 payment protocol integration with a live endpoint"],"bestFor":["Developers experimenting with x402 payment protocol","Agents needing on-demand HR review data without subscriptions","Low-volume, pay-as-you-go API consumers on Base"],"notFor":["Bulk HR data retrieval at scale (no documented batch endpoints)","Users who need detailed API documentation or response schemas before integrating","Anyone without a Base-compatible USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:09.991Z"},"updatedAt":"2026-04-23T16:08:14.650Z"}}