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Prototype voice agents in the Playground. Test prompts, configure voices, and deploy in seconds.

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Create your agent

Go to play.cartesia.ai/agents and select Start in Playground.
Create your first voice agent options
Customize your agent’s behavior, voice, and greeting.
Dynamic agent configuration interface
System Prompt — Define your agent’s role and guidelines. You can also provide a natural language description of your agent and the platform will generate a structured system prompt. Voice — Choose from Cartesia’s voice library. Preview voices before selecting. Initial Message — Set the greeting your agent speaks when calls start. Check Skip agent introduction to have the agent wait for the user to speak first. Background Sound — Add ambient audio for call center atmospheres or office environments. Preview changes before publishing.

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Continue building in code

Connect your Playground agent to GitHub to customize with code.
1

Connect to GitHub

On your agent page, click Connect to GitHub. Authorize Cartesia to create a repository.
2

Clone locally

git clone https://github.com/your-org/your-agent.git
cd your-agent
3

Install dependencies

uv pip install .
4

Edit your agent

Open main.py to add tools, custom logic, or modify the prompt.
5

Deploy

Push to deploy your changes.
git push

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Next steps

Quickstart

Build agents with the SDK

Agents

Prompts, voices, and pre-call configuration