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

# Reasoning Agent

> Run a Claude finance agent with ReasoningTools and YFinance on WhatsApp with visible reasoning.

```python reasoning_agent.py theme={null}
"""
Reasoning Agent
===============

Demonstrates reasoning agent.
"""

from agno.agent import Agent
from agno.db.sqlite import SqliteDb
from agno.models.anthropic.claude import Claude
from agno.os.app import AgentOS
from agno.os.interfaces.whatsapp import Whatsapp
from agno.tools.reasoning import ReasoningTools
from agno.tools.yfinance import YFinanceTools

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

agent_db = SqliteDb(db_file="tmp/persistent_memory.db")

reasoning_finance_agent = Agent(
    name="Reasoning Finance Agent",
    model=Claude(id="claude-sonnet-4-6"),
    db=agent_db,
    tools=[
        ReasoningTools(add_instructions=True),
        YFinanceTools(),
    ],
    instructions="Use tables to display data. When you use thinking tools, keep the thinking brief.",
    add_datetime_to_context=True,
    markdown=True,
)


# Setup our AgentOS app
agent_os = AgentOS(
    agents=[reasoning_finance_agent],
    interfaces=[Whatsapp(agent=reasoning_finance_agent, show_reasoning=True)],
)
app = agent_os.get_app()


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

if __name__ == "__main__":
    agent_os.serve(app="reasoning_agent: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]" anthropic yfinance
    ```
  </Step>

  <Step title="Export environment variables">
    <CodeGroup>
      ```bash Mac/Linux theme={null}
      export ANTHROPIC_API_KEY="your_anthropic_api_key_here"
      export WHATSAPP_ACCESS_TOKEN="your_whatsapp_access_token_here"
      export WHATSAPP_APP_SECRET="your_whatsapp_app_secret_here"
      export WHATSAPP_PHONE_NUMBER_ID="your_whatsapp_phone_number_id_here"
      export WHATSAPP_VERIFY_TOKEN="your_whatsapp_verify_token_here"
      ```

      ```bash Windows theme={null}
      $Env:ANTHROPIC_API_KEY="your_anthropic_api_key_here"
      $Env:WHATSAPP_ACCESS_TOKEN="your_whatsapp_access_token_here"
      $Env:WHATSAPP_APP_SECRET="your_whatsapp_app_secret_here"
      $Env:WHATSAPP_PHONE_NUMBER_ID="your_whatsapp_phone_number_id_here"
      $Env:WHATSAPP_VERIFY_TOKEN="your_whatsapp_verify_token_here"
      ```
    </CodeGroup>
  </Step>

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

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

Full source: [cookbook/05\_agent\_os/19\_whatsapp/reasoning\_agent.py](https://github.com/agno-agi/agno/blob/main/cookbook/05_agent_os/19_whatsapp/reasoning_agent.py)