test_key_validity.py

import os
from dotenv import load_dotenv
import google.generativeai as genai

load_dotenv()
api_key = os.getenv("GOOGLE_API_KEY")

if not api_key:
    print("Error: No API key found in .env")
else:
    try:
        genai.configure(api_key=api_key)
        for m in genai.list_models():
            if 'generateContent' in m.supported_generation_methods:
                print(m.name)
        print("\nAPI Key is valid and models listed successfully.")
    except Exception as e:
        print(f"Error: {e}")