> ## 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.

# A2A Client

> Connect to any A2A-compatible agent server

The `A2AClient` provides a Python interface for communicating with any [A2A protocol](https://a2a-protocol.org/) compatible server. This includes:

* Agno AgentOS instances with A2A interface enabled
* Google ADK agents
* Any other A2A-compatible agent server

## Quick Start

### Connecting to Agno AgentOS via A2A interface

```python theme={null}
import asyncio
from agno.client.a2a import A2AClient

async def main():
    # Connect to an Agno AgentOS A2A endpoint
    client = A2AClient("http://localhost:7003/a2a/agents/my-agent")

    # Send a message
    result = await client.send_message(message="Hello!")
    print(result.content)

asyncio.run(main())
```

### Connecting to Google ADK

Google ADK uses JSON-RPC mode:

```python theme={null}
from agno.client.a2a import A2AClient

client = A2AClient("http://localhost:8001/", protocol="json-rpc")
result = await client.send_message(message="Hello!")
```

## Streaming Responses

Stream responses in real-time:

```python theme={null}
from agno.client.a2a import A2AClient

client = A2AClient("http://localhost:7003/a2a/agents/my-agent")

async for event in client.stream_message(message="Tell me a story"):
    if event.is_content and event.content:
        print(event.content, end="", flush=True)
```

## Developer Resources

* [A2A Protocol Documentation](https://a2a-protocol.org/)
* [A2AClient Reference](/reference/clients/a2a-client)
* [Agno A2A Interface](/agent-os/interfaces/a2a/introduction)