Open-source desktop app to validate API keys OpenAI, Gemini, YouTube - what should I add next?

Hey everyone 👋

I built API Key Health Checker — an open-source desktop app that helps you validate API keys you own and run batch checks without getting surprised by rate limits.

Supported checks :

• OpenAI API (ChatGPT / OpenAI platform)

• Google Gemini API

• YouTube Data API

• Custom endpoints (bring your own URL)

What it does:

• Batch checks with concurrency + rate-limit friendly delays

• Live logs/stats + summary

• Import keys from TXT/CSV/JSON

• Export reports to CSV/JSON

• Runs locally — no telemetry, no tracking. Your keys stay on your machine.

• macOS / Windows / Linux

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

I’d love suggestions: which API providers should I add next? (Anthropic, AWS, Stripe, Supabase, etc.)
If you have a “must-have” check (quota, permissions, endpoint health), tell me your use case and I’ll try to add it.