Multiple MCP Server Integration.

[Priyanshu-NorthAstra]

Hi folks, I wanted to ask this community whether its possible to use Multiple MCP server in Google's ADK?
I am working on building an Agent that needs to parallelly do some stuffs like keeping watch on Gmail like watching emails incoming, etc and could also engage in conversation with the user if needed. I personally think, using a Parallel Agent Object is useful here, but would like to hear the communities thought on this!
Thank you for help!!

[zbigniev]

In this example, tools takes a list. You can have as many MCPToolSet (each corresponding to an MCP server) as you want in this.

[Yash-Kavaiya]

@Priyanshu-NorthAstra

Thank you for your question regarding the integration of multiple MCP servers in Google's Agent Development Kit (ADK). I can confirm that it is indeed possible to use multiple MCP servers simultaneously within a single agent configuration.

Solution Overview

The ADK's architecture supports multiple MCP server integration through the tools parameter in the LlmAgent configuration, which accepts a list of MCPToolset instances. Each MCPToolset corresponds to an individual MCP server connection.

Working Implementation

Here's a verified working example demonstrating the integration of two MCP servers:

import os
from google.adk.agents import LlmAgent
from google.adk.tools.mcp_tool.mcp_toolset import MCPToolset, StdioServerParameters

TARGET_FOLDER_PATH = os.path.join(os.path.dirname(os.path.abspath(__file__)), "/")

root_agent = LlmAgent(
    model='gemini-2.0-flash',
    name='filesystem_assistant_agent',
    instruction='File System and Fi Money MCP Server',
    tools=[
        MCPToolset(
            connection_params=StdioServerParameters(
                command='npx',
                args=[
                    "mcp-remote",
                    "https://mcp.fi.money:8080/mcp/stream",
                    os.path.abspath(TARGET_FOLDER_PATH),
                ],
            ),
        ),
        MCPToolset(
            connection_params=StdioServerParameters(
                command='npx',
                args=[
                    "-y",  
                    "@modelcontextprotocol/server-filesystem",
                    os.path.abspath(TARGET_FOLDER_PATH),
                ],
            ),
        )
    ],
)

Key Implementation Details

1. Multiple MCPToolset Instances: Each MCP server is instantiated as a separate MCPToolset object within the tools list.

2. Independent Server Connections: Each MCPToolset maintains its own connection parameters through StdioServerParameters, allowing for different server configurations and endpoints.

3. Concurrent Operation: The ADK handles the parallel execution of these servers internally, enabling your agent to interact with multiple services simultaneously.

[sanketpatil06]

Hoping this issue is resolved, marking it as closed. Please feel free reach out for any further issue.