Simple desktop app to validate API keys for popular services and run batch checks with rate limits and reports. Supports OpenAI (ChatGPT), Google Gemini, YouTube Data API, and custom endpoints. For MacOS, Windows, Linux. - Batch checks with concurrency, random delay - Multiple parallel runs with live logs, stats, and summary - Import keys from TXT/CSV/JSON - Export reports to CSV/JSON - UI in English, Spanish, and Russian. - Works locally, without telemetry.