"""Google ADK A2A Server for testing A2AClient.
This server uses Google's Agent Development Kit (ADK) to create an A2A-compatible
agent that can be tested with Agno's A2AClient.
Note: To enable streaming, you need to set the `streaming` capability to `true` in the agent card. This means creating a custom agent card and providing it to the `to_a2a` function.
For example:
```python
agent_card = AgentCard(
name="facts_agent",
description="Agent that provides interesting facts.",
url="http://localhost:8001",
version="1.0.0",
capabilities=AgentCapabilities(streaming=True, push_notifications=False, state_transition_history=False),
skills=[],
default_input_modes=["text/plain"],
default_output_modes=["text/plain"],
)
```
Prerequisites:
uv pip install google-adk a2a-sdk uvicorn
export GOOGLE_API_KEY=your_key
Usage:
python cookbook/06_agent_os/client_a2a/servers/google_adk_server.py
The server will start at http://localhost:8001
"""
import os
from google.adk import Agent
from google.adk.a2a.utils.agent_to_a2a import to_a2a
from google.adk.tools import google_search
# ---------------------------------------------------------------------------
# Create Example
# ---------------------------------------------------------------------------
agent = Agent(
name="facts_agent",
model="gemini-2.5-flash-lite",
description="Agent that provides interesting facts using Google Search.",
instruction="You are a helpful agent who can provide interesting facts. "
"Use Google Search to find accurate and up-to-date information when needed.",
tools=[google_search],
)
app = to_a2a(agent, port=int(os.getenv("PORT", "8001")))
# ---------------------------------------------------------------------------
# Run Example
# ---------------------------------------------------------------------------
if __name__ == "__main__":
import uvicorn
print("Server URL: http://localhost:8001")
uvicorn.run(app, host="localhost", port=8001)
Run the Example
# Clone and setup repo
git clone https://github.com/agno-agi/agno.git
cd agno/cookbook/05_agent_os/client_a2a/servers
# Create and activate virtual environment
./scripts/demo_setup.sh
source .venvs/demo/bin/activate
# Export relevant API keys
export PORT="***"
python google_adk_server.py