How to integrate Habitica MCP with Google ADK

This guide walks you through connecting Habitica to Google ADK using the Composio tool router. By the end, you'll have a working Habitica agent that can add a new daily task for exercise, create a challenge for team productivity, delete an outdated task from your challenge through natural language commands. This guide will help you understand how to give your Google ADK agent real control over a Habitica account through Composio's Habitica MCP server. Before we dive in, let's take a quick look at the key ideas and tools involved.

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Habitica is an open-source task manager that gamifies your to-do lists and daily habits. Level up your productivity by turning tasks into an engaging RPG experience.

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Introduction

This guide walks you through connecting Habitica to Google ADK using the Composio tool router. By the end, you'll have a working Habitica agent that can add a new daily task for exercise, create a challenge for team productivity, delete an outdated task from your challenge through natural language commands.

This guide will help you understand how to give your Google ADK agent real control over a Habitica account through Composio's Habitica 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 Habitica account set up and connected to Composio
  • Install the Google ADK and Composio packages
  • Create a Composio Tool Router session for Habitica
  • Build an agent that connects to Habitica through MCP
  • Interact with Habitica 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 Habitica MCP server, and what's possible with it?

The Habitica MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Habitica account. It provides structured and secure access to your tasks, challenges, and groups, so your agent can create tasks, manage challenges, organize groups, and automate productivity routines on your behalf.

  • Automated task creation and management: Let your agent create new tasks, set up habits, or add to-dos to keep your productivity on track—no manual entry needed.
  • Challenge and group organization: Easily create, edit, or delete Habitica challenges and groups so you can coordinate goals and activities with teams or friends.
  • Tag and webhook automation: Have your agent generate new tags for smarter task sorting or set up webhooks for real-time notifications when tasks change or are completed.
  • Subscription and group membership management: Direct your agent to check or cancel subscriptions, leave parties, or delete groups as your needs change.
  • Seamless challenge task updates: Effortlessly add or remove tasks within challenges, helping you keep group goals relevant and up to date.

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 Habitica 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=["habitica"],
)

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 Habitica 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 Habitica 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=["habitica"],
)

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 Habitica operations."
    ),  
    tools=[composio_toolset],
)

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

Conclusion

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

Key takeaways:

  • The Tool Router approach dynamically routes requests to the appropriate Habitica 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 Habitica action and event your agent gets out of the box.

Add Task to Challenge

Tool to add a new task to a specified challenge.

Add Push Device

Tool to register a push notification device for the authenticated user.

Add Tag to Task

Tool to add a tag to a task.

Clone Challenge

Tool to clone an existing challenge.

Create Challenge

Tool to create a new challenge.

Create Habitica Party

Create a new Habitica party for collaborative gameplay.

Create Tag

Tool to create a new tag.

Create Task

Create a new task in Habitica.

Create Webhook

Tool to create a new webhook for taskActivity events.

Delete Habitica Challenge

Permanently delete a Habitica challenge.

Leave or Delete Habitica Group

Leave or delete a Habitica group (party or guild).

Delete Group Chat Message

Tool to delete a chat message from a Habitica group (party, guild, or Tavern).

Delete Habitica Tag

Tool to delete a tag for the authenticated user.

Delete Task

Permanently deletes a user's task (habit, daily, todo, or reward) by its ID.

Delete Task Checklist Item

Tool to delete a checklist item from a task.

Delete User Message

Tool to delete a message from the authenticated user's inbox by its ID.

Delete User Push Device

Tool to remove a push device registration from the authenticated user's account.

Equip Item

Tool to equip or unequip gear, pets, mounts, or costume items in Habitica.

Export Challenge to CSV

Tool to export a Habitica challenge to CSV format.

Get Challenge

Tool to retrieve details of a specific challenge.

Get Group Challenges

Tool to retrieve challenges available in a specific group (guild, party, or tavern).

Get Task by ID

Retrieve a task by its unique ID.

Get Challenge Tasks

Tool to get all tasks for a specified challenge.

Get Content

Retrieves all Habitica game content definitions in a single request.

Get Content By Type

Retrieves Habitica game content data filtered by a specific category type.

Get Export History CSV

Tool to export user tasks history in CSV format.

Get Export Inbox HTML

Tool to export inbox data in HTML format from Habitica.

Export User Data JSON

Exports the authenticated user's complete data in JSON format.

Get Group

Retrieves detailed information about a Habitica group (guild or party).

Get Group Members

Retrieve members of a Habitica group (guild or party).

Get Habitica Groups

Retrieves Habitica groups based on type.

Get Habitica Tavern Group

Tool to retrieve the Habitica Tavern (habitrpg) group details.

Get Party Chat Messages

Tool to retrieve party chat messages from Habitica.

Get Model Paths

Retrieves all available field paths and their data types for a specified Habitica model.

Get News

Tool to retrieve the latest Bailey announcement from Habitica.

Get Party

Retrieves the authenticated user's party details from Habitica.

Get Shops Market Gear

Tool to retrieve the available gear for purchase in the market shop.

Get Time Travelers Shop

Tool to retrieve available items in the Time Travelers shop.

Get Habitica API Status

Tool to check Habitica API server status.

Get Tags

Retrieve all tags for the authenticated Habitica user.

Get Tasks

Tool to retrieve all tasks for the authenticated user.

Get User Challenges

Tool to retrieve challenges the authenticated user participates in.

Get User Profile

Retrieves the authenticated user's complete Habitica profile.

Get Webhooks

Retrieves all webhooks configured for the authenticated Habitica user.

Get World State

Retrieves the current state of the Habitica game world including active events, world boss status, and seasonal NPC visual themes.

Invite To Group

Tool to invite users to a specific group.

Invite To Quest

Tool to invite party members to a quest.

Join Challenge

Tool to join a challenge.

Leave Challenge

Tool to leave a Habitica challenge.

Local Login

Tool to authenticate a user via local credentials.

Local User Registration

Tool to register a new Habitica user via email and password.

Mark Group Chat Seen

Tool to mark all chat messages as read/seen for a specific group.

Mark Notification Seen

Tool to mark a single notification as seen in Habitica.

Mark Notifications Seen

Marks specific notifications as read/seen in Habitica.

Move Pinned Item

Tool to move a pinned item in the rewards column to a new position.

Move Task To Position

Move a Habitica task to a new position in the task list.

Dismiss Bailey Announcement

Tool to dismiss the latest Bailey announcement in Habitica, allowing it to be read later.

Reset User Account

Resets the authenticated user's account to starting state.

Read Card

Tool to mark a card as read in Habitica.

Remove Party Member

Removes a member from the authenticated user's party.

Score Task

Score a Habitica task to mark it as completed or incomplete.

Social Auth

Tool to authenticate a user via a social provider.

Subscribe Webhook

Tool to enable (subscribe) an existing webhook by ID for the authenticated user.

Unlink All Challenge Tasks

Tool to unlink all tasks from a Habitica challenge.

Update Group

Tool to update a Habitica group (party or guild) by modifying its properties.

Update Tag

Tool to update an existing tag's name.

Update Task

Update an existing task in Habitica.

Update Task Checklist Item

Tool to update a checklist item in a task.

Update User

Update the authenticated user's profile, preferences, flags, and other settings in Habitica.

Validate Coupon Code

Validate a Habitica coupon code to check if it is valid and active.

FRAMEWORKS

How to build Habitica MCP Agent with another framework

OpenAI Agents SDK logo

OpenAI Agents SDK

Use Habitica MCP with OpenAI Agents SDK

Claude Agent SDK logo

Claude Agent SDK

Use Habitica MCP with Claude Agent SDK

Claude Code logo

Claude Code

Use Habitica MCP with Claude Code

Claude Cowork logo

Claude Cowork

Use Habitica MCP with Claude Cowork

Codex logo

Codex

Use Habitica MCP with Codex

OpenClaw logo

OpenClaw

Use Habitica MCP with OpenClaw

Hermes logo

Hermes

Use Habitica MCP with Hermes

CLI logo

CLI

Use Habitica MCP with CLI

LangChain logo

LangChain

Use Habitica MCP with LangChain

Vercel AI SDK logo

Vercel AI SDK

Use Habitica MCP with Vercel AI SDK

Mastra AI logo

Mastra AI

Use Habitica MCP with Mastra AI

LlamaIndex logo

LlamaIndex

Use Habitica MCP with LlamaIndex

CrewAI logo

CrewAI

Use Habitica MCP with CrewAI

FAQ

Frequently asked questions

With a standalone Habitica MCP server, the agents and LLMs can only access a fixed set of Habitica tools tied to that server. However, with the Composio Tool Router, agents can dynamically load tools from Habitica 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 Habitica tools.

Yes, absolutely. You can configure which Habitica 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 Habitica data and credentials are handled as safely as possible.

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Karan skipped his own birthday party to fix our critical issue. It was 10pm and he diverted his Waymo to help us instead. This really sets the bar — it shows the commitment you need when users rely on your software.

Harsha Gaddipati
Harsha Gaddipati
Co-founder, Slashy

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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Abhi Arya
Co-founder, Opennote

We chose Composio over Pipedream because it delivered depth where it mattered — niche tools and tricky edge cases other platforms simply ignored. That gave us confidence to scale without compromising.

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CEO, Zams

As a solo builder, shipping fast is life or death. The only way I can outcompete incumbents is by outmanoeuvring them. Getting bogged down managing agent auth would have been a death sentence.

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Founder, Extra Thursday

Before Composio, adding tool integrations was slow and resource-intensive. Each one could take weeks of engineering time, and maintaining them meant constantly keeping up with API changes.

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Founder & CEO, SwarmZero

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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