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

# AgentOS Default Database

> Pass a database to AgentOS once and every listed agent, team, or workflow that does not define its own database inherits it.

Pass a database to AgentOS once and every listed agent, team, or workflow that does not define its own database inherits it. AgentOS provisions the database tables during server startup when auto\_provision\_dbs is enabled.

```python basic.py theme={null}
"""
AgentOS Default Database
========================

Pass a database to AgentOS once and every listed agent, team, or workflow that
does not define its own database inherits it. AgentOS provisions the database
tables during server startup when auto_provision_dbs is enabled.

Prerequisites: OPENAI_API_KEY is needed only for agent runs
Run: .venvs/demo/bin/python cookbook/05_agent_os/02_databases/basic.py
Try: Open http://localhost:7777/config and compare the OS and agent db IDs
"""

from agno.agent import Agent
from agno.db.sqlite import SqliteDb
from agno.models.openai import OpenAIResponses
from agno.os import AgentOS

# ---------------------------------------------------------------------------
# Create Database and Agent
# ---------------------------------------------------------------------------

db = SqliteDb(
    id="agent-os-default-db",
    db_file="tmp/databases.db",
)

# This agent intentionally omits db; AgentOS injects the default database.
database_agent = Agent(
    id="database-agent",
    name="Database Agent",
    model=OpenAIResponses(id="gpt-5.5"),
    instructions="Answer questions concisely.",
    markdown=True,
)

# ---------------------------------------------------------------------------
# Create AgentOS
# ---------------------------------------------------------------------------

agent_os = AgentOS(
    id="database-basics-os",
    description="AgentOS default-database inheritance with SQLite.",
    db=db,
    agents=[database_agent],
    auto_provision_dbs=True,
)
app = agent_os.get_app()

# ---------------------------------------------------------------------------
# Run AgentOS
# ---------------------------------------------------------------------------

if __name__ == "__main__":
    agent_os.serve(app="basic:app", reload=True)
```

## Run the Example

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

  <Step title="Install dependencies">
    ```bash theme={null}
    uv pip install -U "agno[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/02\_databases/basic.py](https://github.com/agno-agi/agno/blob/v3.0.4/cookbook/05_agent_os/02_databases/basic.py)