KeyProbe
Validate LLM API keys & see model access — free forever
What is KeyProbe?
Ever wasted hours debugging why your LLM app isn't working — only to find your API key was invalid? LLM Key Tester solves this in seconds. Paste any key from OpenAI, Anthropic, Google, Mistral, Groq & more — instantly know: ✅ Is the key valid? ✅ Which models it has access to? ✅ How keys compare model-wise? 🔒 Key is NEVER stored or logged — ever. 🆓 No signup. No credit card. Lifetime free. ⚡ Results in under 3 seconds. Built for devs tired of guessing.
From the website
Securely test your AI API keys with KeyProbe in seconds. Validate OpenAI, Anthropic Claude, and Google Gemini keys with real-time connectivity checks, model listings, and latency metrics. 100% client-side, no storage.
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