{"id":"6b5e7c15-0891-4263-8a0e-fb086c926b51","shortId":"egawBJ","kind":"x402","title":"Pay-per-call HR reviews endpoint on Base via x402, settling in USDC at $0.02/request.","tagline":"Pay-per-call HR reviews endpoint on Base via x402, settling in USDC at $0.02/request.","description":"This endpoint at lowpaymentfee.com provides access to an HR reviews resource (specifically review ID 19) 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/19` is not listed on the provider's public landing page among the advertised API categories, but it is live and returns a valid x402 402 challenge when probed via POST. The challenge specifies payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 \"exact\" scheme with a 300-second timeout. No API keys or rate limits are advertised; access is gated purely by micropayment.\n\nDocumentation is minimal — the provider's site lists endpoint paths and prices but does not publish request/response schemas, parameter descriptions, or example payloads. The HR reviews category is not mentioned on the landing page at all, so the exact data returned is unclear. The endpoint accepts POST requests and returns application/json according to the x402 challenge metadata.","tags":[],"capabilities":["x402-payment","usdc-base","pay-per-call","hr-reviews","json-api","no-api-key","micropayment"],"categories":["data"],"synonyms":["HR review API","employee review data","human resources reviews","x402 micropayment API","pay-per-request API","lowpaymentfee","Base USDC API"],"warnings":["The /api/v1/hr/reviews/19 path is not listed among the provider's advertised endpoints — it may be undocumented, experimental, or a placeholder.","No request or response schema is available; the data structure returned after payment is unknown.","No OpenAPI spec, README content, or detailed documentation was found on the provider's site.","The crawled /api, /pricing, and /README pages returned only a 'Connect wallet' prompt with no useful content."],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/reviews/19","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/19","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, but there is no published schema, no request/response examples, and the HR reviews category is not even listed on the provider's own site. The actual data returned is unknown, making this effectively a stub 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'/request':17,34 '0.02':16,33,86,150 '000':139 '0x8335':144 '19':49 '20':138 '2913':145 '300':166 '402':125 '6':154 'Base USDC API' 'HR review API' 'accept':228 'access':40,177 'accord':234 'advertis':113,176 'ai/ml':75 'among':111 'analyt':74 'api':70,114,170 'application/json':233 'base':9,26,95,140,147 'broader':60 'call':4,21,69 'categori':115,209 'challeng':126,132,238 'crypto':78 'data':73,222 'decim':155 'descript':202 'document':183 'dozen':64 'employee review data' 'endpoint':7,24,36,71,99,191,227 'equal':149 'exact':162,221 'exampl':204 'financ':77 'gate':179 'given':151 'hr':5,22,43,207 'hr-reviews' 'human resources reviews' 'id':48 'infer':76 'infrastructur':79 'json-api' 'key':171 'land':109,215 'limit':174 'list':103,190 'live':119 'lowpaymentfee' 'lowpaymentfee.com':38 'made':158 'mention':212 'metadata':239 'micropay':182 'micropayment' 'minim':185 'network':96 'no-api-key' 'offer':63 'page':110,216 'paramet':201 'part':57 'path':192 'pay':2,19,67 'pay-per-cal':1,18,66 'pay-per-call' 'pay-per-request API' 'payload':205 'payment':53,134,156 'per':3,20,68,87 'platform':61 'post':130,229 'price':84,194 'probe':128 'protocol':54 'provid':39,106,187 'public':108 'publish':198 'pure':180 'rate':173 'request':88,230 'request/response':199 'resourc':45 'return':121,223,232 'review':6,23,44,47,208 'schema':200 'scheme':163 'second':167 'settl':12,29,90 'site':189 'span':72 'specif':46,98 'specifi':133 'timeout':168 'unclear':225 'unit':141 'usdc':14,31,92,143,152 'usdc-base' 'util':80 'valid':123 'via':10,27,50,129,159 'x402':11,28,52,124,161,237 'x402 micropayment API' 'x402-payment'","prices":[{"id":"9412c8b8-e6fb-42a1-b710-c65d557417a6","listingId":"6b5e7c15-0891-4263-8a0e-fb086c926b51","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/19","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:19.517Z"}],"sources":[{"listingId":"6b5e7c15-0891-4263-8a0e-fb086c926b51","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/reviews/19","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:19.517Z","lastSeenAt":"2026-04-23T19:02:14.100Z"}],"details":{"listingId":"6b5e7c15-0891-4263-8a0e-fb086c926b51","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/reviews/19 \\\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 valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/19"},{"claim":"USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/19"},{"claim":"All listed endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base network","source_url":"https://lowpaymentfee.com"},{"claim":"The HR reviews endpoint is not listed among the provider's publicly advertised API categories","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving HR review data for a specific review record","Integrating pay-per-call HR data into agent workflows","Accessing structured review information without API key management"],"bestFor":["Agents needing on-demand HR review data with no subscription","Developers testing x402 micropayment integrations","Scenarios requiring keyless, pay-as-you-go API access"],"notFor":["Bulk retrieval of many HR reviews (single-record endpoint, no batch support evident)","Users who need detailed API documentation or OpenAPI specs before integrating","Applications requiring non-USDC or non-Base-network payment"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:10.436Z"},"updatedAt":"2026-04-23T19:02:14.100Z"}}