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Overview

Create interactive AI avatars with full control over your AI stack

Simli Compose

Simli

The API devs use to add faces to realtime AI agents

Welcome to Simli

Create Avatar

We have made some pre-made, default faces for you to use. In our app, you can create an agent [from existing face](https://app.simli.com/create/from-existing) or, use the [Agents API](/api-reference/endpoint/agent/agent-create) to create your own agent with one of these faces, or use the `faceID` directly in our JavaScript SDK.

Default Faces

Create interactive AI avatars with just a few API calls

Simli Auto

Embed a Simli Avatar on your website in a few minutes using Simli Auto.

Embed a Widget

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).

Add Emotions

JavaScript

JavaScript Auth

Python SDK

Discord Server

Create Simli Agent

OpenAI

Explore our open-source projects on GitHub integrating Simli with various AI agents

All Repos

Create Simli session token to be used in Simli sessions (i.e., the [/auto/start/{agent_id}](/api-reference/endpoint/simli-auto/start) endpoint)

/auto/token

Start a Simli session with an agent ID and session token

/auto/start/{agent_id}

Start a Simli session with body parameters (as opposed to using agent ID + session token)

/auto/start/configurable

Retrieve the conversation transcript for a specific session if transcript generation was enabled. If using the [auto/start/configurable](/api-reference/endpoint/simli-auto/start-configurable) API, `createTranscript` must be set to `true`. If using the [sessionToken](api-reference/endpoint/simli-auto/token)-based API, `createTranscript` must be set to `true` in the token configuration.

/auto/transcript/{session_id}

Custom LLM guide

/generateFaceID

/getRequestStatus

Create Agent

Update Agent

Delete Agent

Get Agent

Get All Agents

Get started creating using Simli WebRTC API

Custom WebRTC Client

Start a session and get it's session token

/startAudioToVideoSession

Get TURN servers if you need them for NAT avoidance

/getIceServers

This endpoint returns a url of an HLS .m3u8 playlist file along with an mp4 file.

/audioToVideoStream

Pipecat

LiveKit

Video Tutorials

Use Cases

Feature Your Video

The Simli speech-to-video API lets developers create lip-synced AI avatar interactions. With visual AI avatars, you can create anything! Mock interviews, sales assistants, language learning, coaching, customer-service training, historical characters, and so much more. To see it in action first, [try our demo](https://www.simli.com/demo). Ready to make your first one?

Get Started

Use Simli Auto

Use Simli Compose

Links

Starter repos

Simli Compose

Overview

Get Started

Use Simli Auto

Use Simli Compose

Links

Starter repos

​Overview

Overview