How to integrate Fly MCP with Google ADK

This guide walks you through connecting Fly to Google ADK using the Composio tool router. By the end, you'll have a working Fly agent that can deploy latest image to fly in tokyo, list all running fly apps by region, scale up your fly app to 3 instances through natural language commands. This guide will help you understand how to give your Google ADK agent real control over a Fly account through Composio's Fly MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

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Introduction

This guide walks you through connecting Fly to Google ADK using the Composio tool router. By the end, you'll have a working Fly agent that can deploy latest image to fly in tokyo, list all running fly apps by region, scale up your fly app to 3 instances through natural language commands.

This guide will help you understand how to give your Google ADK agent real control over a Fly account through Composio's Fly MCP server.

Before we dive in, let's take a quick look at the key ideas and tools involved.

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TL;DR

Here's what you'll learn:
  • Get a Fly account set up and connected to Composio
  • Install the Google ADK and Composio packages
  • Create a Composio Tool Router session for Fly
  • Build an agent that connects to Fly through MCP
  • Interact with Fly using natural language

What is Google ADK?

Google ADK (Agents Development Kit) is Google's framework for building AI agents powered by Gemini models. It provides tools for creating agents that can use external services through the Model Context Protocol.

Key features include:

  • Gemini Integration: Native support for Google's Gemini models
  • MCP Toolset: Built-in support for Model Context Protocol tools
  • Streamable HTTP: Connect to external services through streamable HTTP
  • CLI and Web UI: Run agents via command line or web interface

What is the Fly MCP server, and what's possible with it?

The Fly MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Fly account. It provides structured and secure access so your agent can perform Fly operations on your behalf.

What is the Composio tool router, and how does it fit here?

What is Composio SDK?

Composio's Composio SDK helps agents find the right tools for a task at runtime. You can plug in multiple toolkits (like Gmail, HubSpot, and GitHub), and the agent will identify the relevant app and action to complete multi-step workflows. This can reduce token usage and improve the reliability of tool calls. Read more here: Getting started with Composio SDK

The tool router generates a secure MCP URL that your agents can access to perform actions.

How the Composio SDK works

The Composio SDK follows a three-phase workflow:

  1. Discovery: Searches for tools matching your task and returns relevant toolkits with their details.
  2. Authentication: Checks for active connections. If missing, creates an auth config and returns a connection URL via Auth Link.
  3. Execution: Executes the action using the authenticated connection.

Step-by-step Guide

Step by step09 STEPS
1

Prerequisites

Before starting, make sure you have:
  • A Google API key for Gemini models
  • A Composio account and API key
  • Python 3.9 or later installed
  • Basic familiarity with Python
2

Getting API Keys for Google and Composio

Google API Key
  • Go to Google AI Studio and create an API key.
  • Copy the key and keep it safe. You will put this in GOOGLE_API_KEY.
Composio API Key and User ID
  • Log in to the Composio dashboard.
  • Go to Settings → API Keys and copy your Composio API key. Use this for COMPOSIO_API_KEY.
  • Decide on a stable user identifier to scope sessions, often your email or a user ID. Use this for COMPOSIO_USER_ID.
3

Install dependencies

bash
pip install google-adk composio python-dotenv

Inside your virtual environment, install the required packages.

What's happening:

  • google-adk is Google's Agents Development Kit
  • composio connects your agent to Fly via MCP
  • python-dotenv loads environment variables
4

Set up ADK project

bash
adk create my_agent

Set up a new Google ADK project.

What's happening:

  • This creates an agent folder with a root agent file and .env file
5

Set environment variables

bash
GOOGLE_API_KEY=your-google-api-key
COMPOSIO_API_KEY=your-composio-api-key
COMPOSIO_USER_ID=your-user-id-or-email

Save all your credentials in the .env file.

What's happening:

  • GOOGLE_API_KEY authenticates with Google's Gemini models
  • COMPOSIO_API_KEY authenticates with Composio
  • COMPOSIO_USER_ID identifies the user for session management
6

Import modules and validate environment

python
import os
import warnings

from composio import Composio
from dotenv import load_dotenv
from google.adk.agents.llm_agent import Agent
from google.adk.tools.mcp_tool.mcp_session_manager import StreamableHTTPConnectionParams
from google.adk.tools.mcp_tool.mcp_toolset import McpToolset

load_dotenv()

warnings.filterwarnings("ignore", message=".*BaseAuthenticatedTool.*")

GOOGLE_API_KEY = os.getenv("GOOGLE_API_KEY")
COMPOSIO_API_KEY = os.getenv("COMPOSIO_API_KEY")
COMPOSIO_USER_ID = os.getenv("COMPOSIO_USER_ID")

if not GOOGLE_API_KEY:
    raise ValueError("GOOGLE_API_KEY is not set in the environment.")
if not COMPOSIO_API_KEY:
    raise ValueError("COMPOSIO_API_KEY is not set in the environment.")
if not COMPOSIO_USER_ID:
    raise ValueError("COMPOSIO_USER_ID is not set in the environment.")
What's happening:
  • os reads environment variables
  • Composio is the main Composio SDK client
  • GoogleProvider declares that you are using Google ADK as the agent runtime
  • Agent is the Google ADK LLM agent class
  • McpToolset lets the ADK agent call MCP tools over HTTP
7

Create Composio client and Tool Router session

python
composio_client = Composio(api_key=COMPOSIO_API_KEY)

composio_session = composio_client.create(
    user_id=COMPOSIO_USER_ID,
    toolkits=["fly"],
)

COMPOSIO_MCP_URL = composio_session.mcp.url,
print(f"Composio MCP URL: {COMPOSIO_MCP_URL}")
What's happening:
  • Authenticates to Composio with your API key
  • Declares Google ADK as the provider
  • Spins up a short-lived MCP endpoint for your user and selected toolkit
  • Stores the MCP HTTP URL for the ADK MCP integration
8

Set up the McpToolset and create the Agent

python
composio_toolset = McpToolset(
    connection_params=StreamableHTTPConnectionParams(
        url=COMPOSIO_MCP_URL,
        headers={"x-api-key": COMPOSIO_API_KEY}
    )
)

root_agent = Agent(
    model="gemini-2.5-flash",
    name="composio_agent",
    description="An agent that uses Composio tools to perform actions.",
    instruction=(
        "You are a helpful assistant connected to Composio. "
        "You have the following tools available: "
        "COMPOSIO_SEARCH_TOOLS, COMPOSIO_MULTI_EXECUTE_TOOL, "
        "COMPOSIO_MANAGE_CONNECTIONS, COMPOSIO_REMOTE_BASH_TOOL, COMPOSIO_REMOTE_WORKBENCH. "
        "Use these tools to help users with Fly operations."
    ),
    tools=[composio_toolset],
)

print("\nAgent setup complete. You can now run this agent directly ;)")
What's happening:
  • Connects the ADK agent to the Composio MCP endpoint through McpToolset
  • Uses Gemini as the model powering the agent
  • Lists exact tool names in instruction to reduce misnamed tool calls
9

Run the agent

bash
# Run in CLI mode
adk run my_agent

# Or run in web UI mode
adk web

Execute the agent from the project root. The web command opens a web portal where you can chat with the agent.

What's happening:

  • adk run runs the agent in CLI mode
  • adk web . opens a web UI for interactive testing

Complete Code

Here's the complete code to get you started with Fly and Google ADK:

python
import os
import warnings

from composio import Composio
from composio_google import GoogleProvider
from dotenv import load_dotenv
from google.adk.agents.llm_agent import Agent
from google.adk.tools.mcp_tool.mcp_session_manager import StreamableHTTPConnectionParams
from google.adk.tools.mcp_tool.mcp_toolset import McpToolset

load_dotenv()
warnings.filterwarnings("ignore", message=".*BaseAuthenticatedTool.*")

GOOGLE_API_KEY = os.getenv("GOOGLE_API_KEY")
COMPOSIO_API_KEY = os.getenv("COMPOSIO_API_KEY")
COMPOSIO_USER_ID = os.getenv("COMPOSIO_USER_ID")

if not GOOGLE_API_KEY:
    raise ValueError("GOOGLE_API_KEY is not set in the environment.")
if not COMPOSIO_API_KEY:
    raise ValueError("COMPOSIO_API_KEY is not set in the environment.")
if not COMPOSIO_USER_ID:
    raise ValueError("COMPOSIO_USER_ID is not set in the environment.")

composio_client = Composio(api_key=COMPOSIO_API_KEY, provider=GoogleProvider())

composio_session = composio_client.create(
    user_id=COMPOSIO_USER_ID,
    toolkits=["fly"],
)

COMPOSIO_MCP_URL = composio_session.mcp.url


composio_toolset = McpToolset(
    connection_params=StreamableHTTPConnectionParams(
        url=COMPOSIO_MCP_URL,
        headers={"x-api-key": COMPOSIO_API_KEY}
    )
)

root_agent = Agent(
    model="gemini-2.5-flash",
    name="composio_agent",
    description="An agent that uses Composio tools to perform actions.",
    instruction=(
        "You are a helpful assistant connected to Composio. "
        "You have the following tools available: "
        "COMPOSIO_SEARCH_TOOLS, COMPOSIO_MULTI_EXECUTE_TOOL, "
        "COMPOSIO_MANAGE_CONNECTIONS, COMPOSIO_REMOTE_BASH_TOOL, COMPOSIO_REMOTE_WORKBENCH. "
        "Use these tools to help users with Fly operations."
    ),  
    tools=[composio_toolset],
)

print("\nAgent setup complete. You can now run this agent directly ;)")

Conclusion

You've successfully integrated Fly with the Google ADK through Composio's MCP Tool Router. Your agent can now interact with Fly using natural language commands.

Key takeaways:

  • The Tool Router approach dynamically routes requests to the appropriate Fly tools
  • Environment variables keep your credentials secure and separate from code
  • Clear agent instructions reduce tool calling errors
  • The ADK web UI provides an interactive interface for testing and development

You can extend this setup by adding more toolkits to the toolkits array in your session configuration.

TOOLS

Supported Tools

Every Fly action and event your agent gets out of the box.

Add WireGuard Peer

Tool to add a WireGuard peer connection to a Fly.

Check App Name Availability

Tool to validate an app name for Fly.

Check Jobs

Execute GraphQL queries against the Fly.

Check User Only Token

Check whether the authentication token only allows user access.

Create Health Check Job

Tool to create a health check job for monitoring application endpoints in Fly.

Create Check Job Run

Triggers a run of an existing health check job on Fly.

Create Delegated WireGuard Token

Tool to create a delegated WireGuard token for peer management in a Fly.

Create Third-Party Configuration

Tool to create a third-party service configuration for discharging macaroon caveats.

Delete Delegated WireGuard Token

Tool to delete a delegated WireGuard token from a Fly.

Delete Organization

Tool to delete a Fly.

Delete Remote Builder

Tool to delete a remote builder configuration for a Fly.

Delete Third Party Configuration

Tool to delete a third-party service configuration from Fly.

Detach Postgres Cluster

Tool to detach a Postgres cluster from a Fly.

Establish SSH Key

Tool to establish an SSH key for a Fly.

Fetch Nodes by IDs

Fetches a list of node objects from Fly.

Get Add-On

Tool to find a Fly.

Get Add-On Provider

Tool to query information about a specific Fly.

Get app details

Tool to retrieve detailed information about a specific Fly.

Get Certificate

Tool to retrieve a certificate by its ID from Fly.

Get Current Token Info

Tool to get information about the current authentication token.

Get Latest Image Details

Tool to retrieve the latest available tag details for a given image repository from Fly.

Get Latest Image Tag

Tool to retrieve the latest available image tag for a Fly.

Get Machine

Tool to get a single machine by ID from Fly.

Get Nearest Region

Tool to retrieve the nearest Fly.

Get Node by ID

Tool to fetch an object by its globally unique ID using Fly.

Get Organization

Tool to find a Fly.

Get Personal Organization

Tool to retrieve the user's personal organization details from Fly.

Get Placements

Tool to get placement recommendations for Machines in Fly.

Get Platform Information

Tool to retrieve Fly.

Get Products and Pricing

Tool to retrieve Fly.

Get Regions

Tool to get the list of available Fly.

Get Viewer Info

Tool to retrieve the authenticated user's account information from Fly.

Issue Certificate

Tool to issue an SSH certificate for accessing Fly.

List Add-On Plans

Tool to list available add-on service plans from Fly.

List Add-Ons

Tool to list add-ons associated with an organization in Fly.

List Apps

Tool to list all Fly Apps in an organization.

List Apps via GraphQL

List all Fly.

Check Locations

Retrieve all available Fly.

List Machines

Tool to list Fly.

List Organization Machines

Tool to list all Machines across all apps in a Fly organization.

Remove WireGuard Peer

Tool to remove a WireGuard peer connection from a Fly.

Set Apps V2 Default

Tool to configure whether new apps in an organization use Apps V2 by default on Fly.

Update Third-Party Configuration

Tool to update an existing third-party service configuration for discharging macaroon caveats.

Validate Config

Tool to validate a Fly.

Validate WireGuard Peers

Tool to validate WireGuard peer IP addresses in a Fly.

FRAMEWORKS

How to build Fly MCP Agent with another framework

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OpenAI Agents SDK

Use Fly MCP with OpenAI Agents SDK

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Claude Agent SDK

Use Fly MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Fly MCP with Claude Code

Claude Cowork logo

Claude Cowork

Use Fly MCP with Claude Cowork

Codex logo

Codex

Use Fly MCP with Codex

OpenClaw logo

OpenClaw

Use Fly MCP with OpenClaw

Hermes logo

Hermes

Use Fly MCP with Hermes

CLI logo

CLI

Use Fly MCP with CLI

LangChain logo

LangChain

Use Fly MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Fly MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Fly MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Fly MCP with LlamaIndex

CrewAI logo

CrewAI

Use Fly MCP with CrewAI

FAQ

Frequently asked questions

With a standalone Fly MCP server, the agents and LLMs can only access a fixed set of Fly tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Fly and many other apps based on the task at hand, all through a single MCP endpoint.

Yes, you can. Google ADK fully supports MCP integration. You get structured tool calling, message history handling, and model orchestration while Tool Router takes care of discovering and serving the right Fly tools.

Yes, absolutely. You can configure which Fly scopes and actions are allowed when connecting your account to Composio. You can also bring your own OAuth credentials or API configuration so you keep full control over what the agent can do.

All sensitive data such as tokens, keys, and configuration is fully encrypted at rest and in transit. Composio is SOC 2 Type 2 compliant and follows strict security practices so your Fly data and credentials are handled as safely as possible.

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A lot of students tell us that the moment their connected tools start talking to each other inside Opennote feels almost magical. The agent just knows them, and it's immensely helped keep new users on the platform.

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With hands-on help from their founder, we integrated Gmail and Google Drive in just 30 minutes. This level of personal support and commitment is exactly what startups should strive for.

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