Visit the OpenRouter website: https://openrouter.ai
Create a free account.
Log in to your newly created account.
Navigate to your Profile
3. Click on Settings.
4. Click on Keys.
5. Click on Create Key.
6. Enter a name for your API key.
7. Click on Create.
8. Copy the key and paste it to where it is needed.
Click on the hamburger icon.
2. Click on Credits.
3. Click on Add Credits.
4. Select your Country or region.
5. Enter your billing address.
6. Click on Update Address.
7. Add your card details.
8. Click on Save payment method.
9. Enter the amount to top-up the credit value.
10. Click on Purchase.