> ## 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.

# Async Tool Use

> Run YFinanceTools from a LiteLLM-backed agent asynchronously with aprint_response().

## Code

```python tool_use.py theme={null}
import asyncio

from agno.agent import Agent
from agno.models.litellm import LiteLLM
from agno.tools.yfinance import YFinanceTools

openai_agent = Agent(
    model=LiteLLM(
        id="gpt-4o",
        name="LiteLLM",
    ),
    markdown=True,
    tools=[YFinanceTools()],
)

asyncio.run(openai_agent.aprint_response("What is happening in France?"))
```

## Usage

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

  <Step title="Set your API key">
    ```bash theme={null}
    export LITELLM_API_KEY=xxx
    ```
  </Step>

  <Step title="Install dependencies">
    ```bash theme={null}
    uv pip install -U "litellm<=1.82.6" yfinance agno
    ```
  </Step>

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

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