> ## 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.

# Serve an Agent on WhatsApp

> Mount one Agent on AgentOS's WhatsApp interface.

Mount one Agent on AgentOS's WhatsApp interface. The interface verifies Meta webhooks, maps each phone number to a persistent session, and sends the Agent's response back through the WhatsApp Cloud API.

```python basic.py theme={null}
"""
Serve an Agent on WhatsApp
==========================

Mount one Agent on AgentOS's WhatsApp interface. The interface verifies Meta
webhooks, maps each phone number to a persistent session, and sends the Agent's
response back through the WhatsApp Cloud API.

Prerequisites: OPENAI_API_KEY and the four WHATSAPP_* credentials in README.md
Run: .venvs/demo/bin/python cookbook/05_agent_os/19_whatsapp/basic.py
Try: GET http://localhost:7777/whatsapp/status, then message the configured number
"""

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

# ---------------------------------------------------------------------------
# Create the WhatsApp AgentOS
# ---------------------------------------------------------------------------

db = SqliteDb(
    id="whatsapp-basic-db",
    db_file="tmp/whatsapp_basic.db",
)

assistant = Agent(
    id="whatsapp-assistant",
    name="WhatsApp Assistant",
    model=OpenAIResponses(id="gpt-5.5"),
    db=db,
    add_history_to_context=True,
    num_history_runs=3,
    instructions=[
        "You are chatting with the user on WhatsApp.",
        "Keep responses conversational, concise, and easy to read on a phone.",
    ],
)

agent_os = AgentOS(
    id="whatsapp-basic-os",
    description="A minimal AgentOS exposed through the WhatsApp interface.",
    agents=[assistant],
    interfaces=[Whatsapp(agent=assistant)],
)
app = agent_os.get_app()

# ---------------------------------------------------------------------------
# Run the WhatsApp Server
# ---------------------------------------------------------------------------

if __name__ == "__main__":
    agent_os.serve(app=app)
```

## 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 environment variables">
    <CodeGroup>
      ```bash Mac/Linux theme={null}
      export OPENAI_API_KEY="your_openai_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:OPENAI_API_KEY="your_openai_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 `basic.py`, then run:

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

Full source: [cookbook/05\_agent\_os/19\_whatsapp/basic.py](https://github.com/agno-agi/agno/blob/v3.0.4/cookbook/05_agent_os/19_whatsapp/basic.py)