{"id":"b6e8a8eb-ddd1-4a5d-ab17-322d7b27ea31","shortId":"5a2sRS","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 23) via the x402 payment protocol. It is live and returns a 402 challenge requiring payment in USDC on the Base network. The cost per request is $0.02 (20,000 base units of USDC with 6 decimals). Payment is made via the x402 \"exact\" scheme to the specified wallet address, with no API keys or rate limits required.\n\nThe endpoint is part of a broader platform (lowpaymentfee.com) that offers dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request. However, this specific listing covers only the `/api/v1/hr/reviews/23` path. The endpoint accepts POST requests and returns JSON. Beyond the x402 challenge metadata, there is no published OpenAPI schema, request/response documentation, or example payloads available from the provider's site. The docs, pricing, and API pages all appear to require wallet connection and contain no additional technical detail.\n\nBecause the endpoint path suggests a single HR review resource (ID 23) rather than a parameterized query, it is unclear whether this is a demonstration endpoint, a fixed dataset, or part of a broader HR reviews collection. Prospective callers should be aware that no input/output schema is documented and the actual response payload is unknown without making a paid request.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-call","hr-reviews","json-response","no-api-key"],"categories":["data"],"synonyms":["HR review API","employee review data","human resources reviews","x402 paid endpoint","lowpaymentfee API","USDC micropayment API","Base network API"],"warnings":["No OpenAPI or request/response schema is published for this endpoint.","The /api/v1/hr/reviews/23 path is not listed among the provider's advertised APIs — it may be undocumented or a test resource.","Docs, pricing, and API pages require wallet connection and contain no readable technical content.","Response format and fields are entirely unknown without making a paid call."],"endpointUrl":"https://lowpaymentfee.com/api/v1/hr/reviews/23","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/23","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no request/response examples, no documentation beyond the landing page listing, and the specific resource (/hr/reviews/23) is not mentioned anywhere on the site. The actual payload and purpose are 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'/request':17,34 '0.02':16,33,76,138 '000':78 '20':77 '23':49,209 '402':61 '6':84 'Base network API' 'HR review API' 'USDC micropayment API' 'accept':152 'access':40 'actual':248 'addit':195 'address':98 'ai/ml':128 'analyt':127 'api':101,124,184 'appear':187 'avail':174 'awar':239 'base':9,26,69,79 'base-network' 'beyond':158 'broader':113,231 'call':4,21,123 'caller':236 'challeng':62,161 'collect':234 'connect':191 'contain':193 'cost':72 'cover':145 'data':126,131 'dataset':226 'decim':85 'demonstr':222 'detail':197 'doc':181 'document':170,245 'dozen':118 'employee review data' 'endpoint':7,24,36,108,151,200,223 'exact':92 'exampl':172 'finance/web3':130 'fix':225 'howev':141 'hr':5,22,43,205,232 'hr-reviews' 'human resources reviews' 'id':48,208 'infer':129 'infrastructur':133 'input/output':242 'json':157 'json-response' 'key':102 'limit':105 'list':144 'live':57 'lowpaymentfee API' 'lowpaymentfee.com':38,115 'made':88 'make':254 'metadata':162 'network':70 'no-api-key' 'offer':117 'openapi':167 'page':185 'paid':256 'parameter':213 'part':110,228 'path':149,201 'pay':2,19,121 'pay-per-cal':1,18,120 'pay-per-call' 'payload':173,250 'payment':53,64,86 'per':3,20,73,122,139 'platform':114 'post':153 'price':136,182 'prospect':235 'protocol':54 'provid':39,177 'publish':166 'queri':214 'rate':104 'rather':210 'request':74,140,154,257 'request/response':169 'requir':63,106,189 'resourc':45,207 'respons':249 'return':59,156 'review':6,23,44,47,206,233 'schema':168,243 'scheme':93 'settl':12,29 'singl':204 'site':179 'span':125 'specif':46,143 'specifi':96 'suggest':202 'technic':196 'unclear':217 'unit':80 'unknown':252 'usdc':14,31,66,82 'usdc-settlement' 'util':134 'via':10,27,50,89 'wallet':97,190 'whether':218 'without':253 'x402':11,28,52,91,160 'x402 paid endpoint' 'x402-payment'","prices":[{"id":"c59252b6-7fd3-4cf4-91eb-51fad86f7dec","listingId":"b6e8a8eb-ddd1-4a5d-ab17-322d7b27ea31","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/23","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:19.612Z"}],"sources":[{"listingId":"b6e8a8eb-ddd1-4a5d-ab17-322d7b27ea31","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/hr/reviews/23","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:19.612Z","lastSeenAt":"2026-04-23T17:32:46.169Z"}],"details":{"listingId":"b6e8a8eb-ddd1-4a5d-ab17-322d7b27ea31","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/hr/reviews/23 \\\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 challenge requiring USDC payment on Base network with maxAmountRequired of 20000 base units.","source_url":"https://lowpaymentfee.com/api/v1/hr/reviews/23"},{"claim":"The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on the Base network.","source_url":"https://lowpaymentfee.com"},{"claim":"USDC uses 6 decimals, so 20000 base units equals $0.02.","source_url":"https://lowpaymentfee.com"}],"useCases":["Retrieving HR review data for a specific review ID via a single paid API call","Demonstrating x402 payment protocol integration with USDC on Base","Agent-driven data retrieval with per-call crypto micropayments"],"bestFor":["Developers experimenting with x402 payment protocol","Agents that need on-demand HR review data without API key management","Low-volume, pay-as-you-go data access with no subscription commitment"],"notFor":["Bulk HR data retrieval (no documented batch or list endpoints)","Users who need detailed API documentation or guaranteed SLAs","Anyone without a Base-network USDC wallet"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:13:10.271Z"},"updatedAt":"2026-04-23T17:32:46.169Z"}}