> ## Documentation Index
> Fetch the complete documentation index at: https://phidatainc-agui.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Cartesia

> Use Cartesia with Agno Agents.

Use Cartesia with Agno Agents for generating text-to-speech and audio.

## Prerequisites

* Get an API key from [https://play.cartesia.ai/keys](https://play.cartesia.ai/keys)
* Run `uv pip install cartesia` to install the dependencies.

```python theme={null}

from agno.agent import Agent
from agno.tools.cartesia import CartesiaTools
from agno.utils.audio import write_audio_to_file

# ---------------------------------------------------------------------------
# Create Agent
# ---------------------------------------------------------------------------


# Initialize Agent with Cartesia tools
agent = Agent(
    name="Cartesia TTS Agent",
    description="An agent that uses Cartesia for text-to-speech.",
    tools=[CartesiaTools()],
)

# ---------------------------------------------------------------------------
# Run Agent
# ---------------------------------------------------------------------------
if __name__ == "__main__":
    response = agent.run(
        """Generate a simple greeting using Text-to-Speech:

        Say "Welcome to Cartesia, the advanced  speech synthesis platform. This speech is generated by an agent."
        """
    )

    # Save the generated audio
    if response.audio:
        write_audio_to_file(
            audio=response.audio[0].content, filename="tmp/greeting.mp3"
        )
```

## Run the Example

```bash theme={null}
# Clone and setup repo
git clone https://github.com/agno-agi/agno.git
cd agno/cookbook/91_tools

# Create and activate virtual environment
./scripts/demo_setup.sh
source .venvs/demo/bin/activate

python cartesia_tools.py
```

For details, see [Cartesia cookbook](https://github.com/agno-agi/agno/blob/main/cookbook/91_tools/cartesia_tools.py).