> ## Documentation Index
> Fetch the complete documentation index at: https://docs.naga.ac/llms.txt
> Use this file to discover all available pages before exploring further.

# Chat Interface

Use the Chat Interface when you want to talk to NagaAI models in the browser without building an app first.

It is a good fit for quick experiments, model comparison, and prompt iteration. If you are building a product integration, start with [Quickstart](/get-started/quickstart) instead.

## Open the chat

1. Go to [NagaAI Chat](https://chat.naga.ac).
2. Sign in to your account.
3. Add your API key in chat settings if the interface prompts you for one.
4. Start a conversation and switch models as needed.

<Tip>
  Use a standard API key here, not a provisioning key.
</Tip>

## Need help connecting your key?

If you need help with the browser setup, use this short walkthrough:

<video controls className="w-full aspect-video" src="https://mintcdn.com/nagaai-60f8697b/nbl1KDrtw3_cqedh/static/video/librechat-setup.mp4?fit=max&auto=format&n=nbl1KDrtw3_cqedh&q=85&s=44f8138a2bce51a10b4310831e025592" data-path="static/video/librechat-setup.mp4" />

## What to use it for

* trying prompts before you move them into code
* comparing how different models respond to the same request
* testing conversations manually before you automate them

## Next steps

* Use [Playground](/product/playground) when you want to test image or audio workflows.
* Use [Quickstart](/get-started/quickstart) when you are ready to integrate the API.
* Use [Models](/get-started/models) when you want to compare model options and access tiers.