> ## Documentation Index
> Fetch the complete documentation index at: https://agno-v2-service-account.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Basic

> Serve a minimal assistant agent through the AG-UI interface in AgentOS.

```python basic.py theme={null}
"""
Basic
=====

Demonstrates basic.
"""

from agno.agent.agent import Agent
from agno.models.openai import OpenAIResponses
from agno.os import AgentOS
from agno.os.interfaces.agui import AGUI

# ---------------------------------------------------------------------------
# Create Example
# ---------------------------------------------------------------------------

chat_agent = Agent(
    name="Assistant",
    model=OpenAIResponses(id="gpt-5.4"),
    instructions="You are a helpful AI assistant.",
    add_datetime_to_context=True,
    markdown=True,
)

# Setup your AgentOS app
agent_os = AgentOS(
    agents=[chat_agent],
    interfaces=[AGUI(agent=chat_agent)],
)
app = agent_os.get_app()


# ---------------------------------------------------------------------------
# Run Example
# ---------------------------------------------------------------------------

if __name__ == "__main__":
    """Run your AgentOS.

    You can see the configuration and available apps at:
    http://localhost:9001/config

    """
    agent_os.serve(app="basic:app", reload=True, port=9001)
```

## Run the Example

<Steps>
  <Snippet file="create-venv-step.mdx" />

  <Step title="Install dependencies">
    ```bash theme={null}
    uv pip install -U "agno[agui,os]" openai
    ```
  </Step>

  <Step title="Export your OpenAI API key">
    <CodeGroup>
      ```bash Mac/Linux theme={null}
      export OPENAI_API_KEY="your_openai_api_key_here"
      ```

      ```bash Windows theme={null}
      $Env:OPENAI_API_KEY="your_openai_api_key_here"
      ```
    </CodeGroup>
  </Step>

  <Step title="Run the example">
    Save the code above as `basic.py`, then run:

    ```bash theme={null}
    python basic.py
    ```
  </Step>
</Steps>

Full source: [cookbook/05\_agent\_os/interfaces/agui/basic.py](https://github.com/agno-agi/agno/blob/main/cookbook/05_agent_os/interfaces/agui/basic.py)