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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.

Install:

brew install --cask nbox/tap/api-key-health-checker

Uninstall:

brew uninstall --cask --zap api-key-health-checker

Releases: https://github.com/nbox/API-Key-Health-Checker/releases

⚠️ macOS may block unsigned builds downloaded from GitHub. If you see the message "app is damaged and can't be opened. You should move it to the Trash", run:

xattr -dr com.apple.quarantine "/Applications/API Key Health Checker.app"

• Service adapters: OpenAI, Gemini, YouTube, Custom
• Batch checks with concurrency, random delay (jitter), retries, global RPS limiter
• Multiple parallel runs with live logs, stats, and summary
• Import keys from TXT/CSV/JSON, encoding selection, dedupe, format warnings
• Export reports to CSV/JSON (masked or full)
• UI languages: English (default), Russian, Spanish

• Keys are sent only to the selected API endpoint
• No telemetry
• Use only keys you own or have permission to test
• Full export saves plain text keys (no encryption). Handle with care.

• Node.js 20+
• npm

npm install
npm run dev

git clone https://github.com/nbox/API-Key-Health-Checker.git
cd API-Key-Health-Checker
npm install
npm run build
npm run dist

Build output is written to dist/. DMG output: release/API Key Health Checker-1.0.0-{arch}.dmg. macOS build: run npm run dist on macOS to generate a .dmg in release/. Windows build: run npm run dist on Windows to generate a .exe installer in release/.

• On push to main or tags v*
• Builds for macOS, Windows, and Linux
• Creates a GitHub Release with artifacts

Use the Custom adapter to define a base URL, path, auth type (bearer/header/query), and success status codes.

• src/main: Electron main process and execution engine
• src/renderer: UI (React + Tailwind)
• src/shared: shared types and utilities