> ## 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.

# Pass per-request dependencies through AgentOS

> AgentOS accepts a JSON ``dependencies`` form field on run requests and passes the values into the agent's instruction templates.

AgentOS accepts a JSON `dependencies` form field on run requests and passes the values into the agent's instruction templates. The client supplies a robot name for one request and verifies that the served agent used it.

```python dependencies.py theme={null}
"""
Pass per-request dependencies through AgentOS
=============================================

AgentOS accepts a JSON ``dependencies`` form field on run requests and passes
the values into the agent's instruction templates. The client supplies a robot
name for one request and verifies that the served agent used it.

Prerequisites: OPENAI_API_KEY
Run: .venvs/demo/bin/python cookbook/05_agent_os/06_customize/dependencies.py
Try: Run this file with --demo in another terminal
"""

import argparse
import json

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

# ---------------------------------------------------------------------------
# Create Dependency-Aware AgentOS
# ---------------------------------------------------------------------------

BASE_URL = "http://localhost:7777"
AGENT_ID = "dependency-aware-agent"

db = SqliteDb(
    id="dependencies-db",
    db_file="tmp/agent_os_dependencies.db",
)

story_agent = Agent(
    id=AGENT_ID,
    name="Dependency-Aware Story Agent",
    model=OpenAIResponses(id="gpt-5.5"),
    db=db,
    instructions=(
        "Write exactly one sentence about a robot named {robot_name}. "
        "The sentence must contain that exact name."
    ),
)

agent_os = AgentOS(
    id="dependencies-os",
    db=db,
    agents=[story_agent],
)
app = agent_os.get_app()


def run_demo() -> None:
    """Send one dependency payload through the AgentOS run endpoint."""
    with httpx.Client(base_url=BASE_URL, timeout=120.0) as client:
        response = client.post(
            f"/agents/{AGENT_ID}/runs",
            data={
                "message": "Write the robot story.",
                "session_id": "dependencies-demo",
                "dependencies": json.dumps({"robot_name": "Anna"}),
                "stream": "false",
            },
        )
        response.raise_for_status()
        run = response.json()
        content = str(run.get("content"))
        if run["status"] != "COMPLETED":
            raise RuntimeError(f"Expected COMPLETED, got {run['status']}")
        if "Anna" not in content:
            raise RuntimeError("The model response did not use the dependency")
        print(f"Final status: {run['status']}")
        print(f"Result: {content}")


# ---------------------------------------------------------------------------
# Run Dependency-Aware AgentOS
# ---------------------------------------------------------------------------

if __name__ == "__main__":
    parser = argparse.ArgumentParser(description=__doc__)
    parser.add_argument(
        "--demo",
        action="store_true",
        help="Run the HTTP client against a server already listening on port 7777.",
    )
    args = parser.parse_args()

    if args.demo:
        run_demo()
    else:
        agent_os.serve(app=app, port=7777)
```

## 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="Start AgentOS">
    Save the code above as `dependencies.py`, then run:

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

  <Step title="Run the dependency request">
    In a second terminal with the same environment, run:

    ```bash theme={null}
    python dependencies.py --demo
    ```
  </Step>
</Steps>

Full source: [cookbook/05\_agent\_os/06\_customize/dependencies.py](https://github.com/agno-agi/agno/blob/v3.0.4/cookbook/05_agent_os/06_customize/dependencies.py)