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

# Add Emotions

> Add dynamic emotions to your Simli Avatar to create more engaging and expressive interactions. This feature is only available in [Simli Auto](/api-reference/simli-auto).

## Features

<Card title="Simli Agents API" icon="code" href="/api-reference/endpoint/agent/agent-update">
  Update your Simli agent with emotions through the Agents API
</Card>

### Supported Emotions

The Simli app currently supports 5 distinct emotions that can be applied to your avatar, but our APIs support even more.

## Available Emotions

Simli provides a comprehensive set of emotions to make your avatar more expressive and engaging. Each emotion has multiple variations to provide natural diversity in expressions.

### Preset Emotions

| Emotion      | Description                      |
| ------------ | -------------------------------- |
| **Natural**  | Default, calm expressions        |
| **Happy**    | Positive, joyful expressions     |
| **Angry**    | Frustrated, upset expressions    |
| **Doubtful** | Uncertain, skeptical expressions |

### Emotion IDs

Each emotion has a unique UUID that you can use in your API calls:

| Emotion Type | Emotion ID                             |
| ------------ | -------------------------------------- |
| Natural #0   | `b4fcff6b-3072-45ad-89db-5a859287f3b2` |
| Natural #1   | `278fc3b6-b70e-4a2e-ba15-16f6a4e770d2` |
| Natural #2   | `6be22009-5406-4e83-be41-e70b8863d3dd` |
| Natural #3   | `8cb2eeac-b54f-4d8a-bc90-9eeb5f8e8311` |
| Natural #4   | `7713d99a-b786-4d62-9e4e-4c6f6f2ef2de` |
| Natural #5   | `d985f836-e054-46c3-bcc1-a1010791b7e1` |
| Natural #6   | `a8f318cf-efc4-4c80-a29a-e1a69bebca18` |
| Natural #7   | `011443f2-eefd-49fc-a76c-dd1d5f0c4a3d` |
| Happy #0     | `92f24a0c-f046-45df-8df0-af7449c04571` |
| Happy #1     | `7a65257c-25b3-4dc1-889d-ff8a3d51ee01` |
| Happy #2     | `e6cebb46-e415-4a59-8f82-85fe36e5f1b1` |
| Angry #1     | `668f65f6-cf71-46b5-9876-40bd83fb18d2` |
| Doubtful #0  | `7f5e31e8-0bf4-4a8f-97f9-76660b0f7aa1` |
| Doubtful #1  | `c24cd218-b056-4ad4-afc7-57574c4339c2` |