Todoist with Google ADK

How to integrate Todoist MCP with Google ADK

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Introduction Also integrate Todoist with TL;DR What is Google ADK What is the Todoist MCP server Supported Tools & Triggers Creating MCP Server - Stand-alone vs Composio SDK Step-by-step Guide Complete Code Conclusion How to build Todoist MCP Agent with another framework Explore Other Toolkits FAQ

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Introduction

This guide walks you through connecting Todoist to Google ADK using the Composio tool router. By the end, you'll have a working Todoist agent that can add a high-priority task for today, create a new project called 'team offsite', close all completed tasks from this week through natural language commands.

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

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

Also integrate Todoist with

ChatGPT OpenAI Agents SDK Claude Agent SDK Claude Code Claude Cowork Codex OpenCode Cursor VS Code OpenClaw Hermes CLI LangChain Vercel AI SDK Mastra AI LlamaIndex CrewAI

TL;DR

Here's what you'll learn:

Get a Todoist account set up and connected to Composio
Install the Google ADK and Composio packages
Create a Composio Tool Router session for Todoist
Build an agent that connects to Todoist through MCP
Interact with Todoist 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 Todoist MCP server, and what's possible with it?

The Todoist MCP server is an implementation of the Model Context Protocol that connects your AI agent and assistants like Claude, Cursor, etc directly to your Todoist account. It provides structured and secure access to your tasks, projects, and labels, so your agent can create tasks, manage projects, add comments, organize sections, and update your to-do lists on your behalf.

Task creation and scheduling: Instantly ask your agent to add new tasks with specific details, deadlines, priorities, or even as subtasks within projects or sections.
Project and workspace management: Let your agent create, organize, or delete projects and workspaces to keep your productivity system tidy and up-to-date.
Section and label organization: Direct your agent to create, delete, or update sections and labels, helping you structure your tasks and filter lists for better focus.
Task completion and commenting: Have your agent mark tasks as complete or add helpful comments and notes to specific tasks or projects for seamless collaboration.
Streamlined cleanup and maintenance: Empower your agent to remove unused projects, labels, or sections, ensuring your Todoist stays clutter-free and organized.

Supported Tools & Triggers

Tools

Triggers

Add WorkspaceTool to create a new workspace in Todoist.

Archive Project (API v1)Tool to archive a project using Todoist API v1.

Bulk Create TasksCreate many tasks in one request using Todoist's Sync batching.

Close Task (API v1)Tool to close (complete) a task in Todoist using API v1.

Create Comment (API v1)Tool to create a new comment on a project or task using Todoist API v1.

Create Label (API v1)Tool to create a new personal label using API v1.

Create Project (API v1)Tool to create a new project in Todoist using the unified API v1.

Create Section (API v1)Tool to create a new section within a project using API v1.

Create taskCreate a new task in Todoist using the unified API v1.

Delete CommentTool to delete a specific comment from Todoist by its ID.

Delete Label (V1)Tool to delete a personal label using API v1.

Delete Project (API v1)Tool to delete a project and all of its sections and tasks using Todoist API v1.

Delete Section (v1)Tool to delete a section and all tasks within it.

Delete TaskTool to delete a specific task from Todoist.

Delete UploadTool to delete an uploaded file from Todoist.

Export Template As FileTool to export a Todoist project as a CSV template file.

Export Template As URLTool to export a Todoist project as a shareable template URL.

Filter TasksTool to get all tasks matching the filter.

Get All CommentsThis tool retrieves all comments associated with a specific task or project in Todoist.

Get all projectsGet all projects from a user's Todoist account.

Get All TasksFetches all INCOMPLETE tasks from Todoist and returns their details.

Get BackupsTool to list all available backup archives for the user.

Get Comment (V1)Tool to retrieve a single comment by ID using the v1 API.

Get Completed Tasks By Completion DateTool to retrieve completed tasks within a specified completion date window.

Get ID MappingsTool to translate IDs between Todoist API v1 and v2.

Get Personal LabelTool to retrieve a personal label by its ID.

Get Productivity StatsTool to retrieve comprehensive productivity statistics for the authenticated user.

Get Project (API v1)Tool to retrieve a specific project by its ID using Todoist API v1.

Get Full Project DataTool to retrieve full project data including all sections, tasks, and collaborators.

Get Project PermissionsTool to retrieve all available roles and their associated actions in Todoist projects.

Get Section (v1 API)Tool to retrieve a specific section by its ID using Todoist v1 API.

Get Special BackupsTool to list special backup archives for the authenticated user's projects.

Get Task (API v1)Tool to retrieve a single active (non-completed) task by ID using API v1.

Get UserTool to retrieve information about the currently authenticated user.

Get Workspace Plan DetailsTool to retrieve details about a workspace's current plan and usage.

Import Template Into Project By IDTool to import a template from Todoist's template gallery into an existing project.

Import Template Into Project From FileTool to import a CSV template into an existing Todoist project from a file.

Invite Project CollaboratorTool to invite a collaborator to a Todoist project by email.

List ActivitiesTool to get activity logs from Todoist.

List All Workspace InvitationsTool to return a list containing details of all pending invitations to a workspace.

List Archived ProjectsTool to get all archived projects from Todoist.

List Archived SectionsTool to retrieve all archived sections for a specific project in Todoist.

List Archived Workspace ProjectsTool to list all archived projects in a workspace.

List Completed TasksTool to retrieve all completed tasks with optional project filtering.

List Completed Tasks By Due DateTool to retrieve completed tasks within a specified due date range (up to 6 weeks).

List FiltersTool to list all filters for the authenticated user.

List Joinable WorkspacesTool to get workspaces the user can join.

List LabelsTool to get all user labels with pagination support.

List Pending Workspace InvitationsTool to list pending invitation emails in a workspace.

List Project CollaboratorsTool to get all collaborators for a given project with cursor-based pagination.

List SectionsTool to get all active sections for the user, with optional filtering by project.

List Shared LabelsTool to retrieve shared label names from active tasks with pagination support.

List Workspace Active ProjectsTool to list all active workspace projects.

List Workspace Archived ProjectsTool to get archived projects in a workspace.

List Workspace InvitationsTool to list user emails with pending invitations to a workspace.

List Workspace UsersTool to list users in workspace(s).

Move TaskTool to move a task to another project, section, or parent task while preserving task identity and metadata.

Move Task (REST API)Tool to move a task to another project, section, or parent task using the REST API.

Quick Add TaskTool to add tasks using natural language parsing similar to the official Todoist clients.

Remove Shared Label (API v1)Tool to remove a shared label from all active tasks using API v1.

Rename Shared Labels (API v1)Tool to rename a shared label across all active tasks using API v1.

Reopen Task (API v1)Tool to reopen a completed task in Todoist using API v1.

Reorder TasksReorder tasks deterministically by updating child_order in bulk via the Sync API item_reorder command.

Search LabelsTool to search user labels by name with case-insensitive matching.

Search ProjectsSearch active user projects by name with support for wildcards and pagination.

Search SectionsTool to search active sections by name, optionally filtered by project.

Todoist SyncTool to sync data with Todoist server, supporting both read and write operations.

Unarchive Project (API v1)Tool to unarchive a previously archived Todoist project using API v1.

Update Comment (v1)Tool to update a comment by ID and return its content via v1 API.

Update Label (API v1)Tool to update an existing label using API v1.

Update Notification SettingTool to update notification settings for the current user.

Update Project (API v1)Tool to update a project's properties using Todoist API v1.

Update Section (v1)Tool to update an existing section by its ID using Todoist v1 API.

Update TaskTool to update an existing task's properties.

Update Workspace LogoTool to upload an image as the workspace logo or delete the existing logo.

Upload FileTool to upload a file to Todoist.

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:

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

Step-by-step Guide

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

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.

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 Todoist via MCP
python-dotenv loads environment variables

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

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

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

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=["todoist"],
)

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

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 Todoist 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

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 Todoist 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=["todoist"],
)

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

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

Conclusion

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

Key takeaways:

The Tool Router approach dynamically routes requests to the appropriate Todoist 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.

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Hermes

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CLI

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Mastra AI

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OpenCode

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VS Code

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TOOLKIT MARKETPLACE

FAQ

What are the differences in Tool Router MCP and Todoist MCP?

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

Can I use Tool Router MCP with Google ADK?

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 Todoist tools.

Can I manage the permissions and scopes for Todoist while using Tool Router?

Yes, absolutely. You can configure which Todoist 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.

How safe is my data with Composio Tool Router?

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 Todoist data and credentials are handled as safely as possible.

Used by agents from

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We handle tool reliability, observability, and security so you never have to second-guess an agent action.

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Harsha GaddipatiCo-founder, Slashy

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

Abhi AryaCo-founder, Opennote

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 has immensely helped in keeping new users on the platform.

Nirman DaveCEO, Zams

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

Ryan YuFounder, Extra Thursday

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

Tomisin JenrolaFounder & CEO, SwarmZero

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

Jerome LeclancheCo-Founder, Ingram Technologies

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.

Harsha GaddipatiCo-founder, Slashy

Abhi AryaCo-founder, Opennote

Nirman DaveCEO, Zams

Ryan YuFounder, Extra Thursday

Tomisin JenrolaFounder & CEO, SwarmZero

Jerome LeclancheCo-Founder, Ingram Technologies

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.

Harsha GaddipatiCo-founder, Slashy

Abhi AryaCo-founder, Opennote

Nirman DaveCEO, Zams

Ryan YuFounder, Extra Thursday

Tomisin JenrolaFounder & CEO, SwarmZero

Jerome LeclancheCo-Founder, Ingram Technologies

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.

How to integrate Todoist MCP with Google ADK

Table of Contents

Connect Todoist without Auth hassles

Introduction

Also integrate Todoist with

TL;DR

What is Google ADK?

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

Supported Tools & Triggers

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

What is Composio SDK?

How the Composio SDK works

Step-by-step Guide

Prerequisites

Getting API Keys for Google and Composio

Install dependencies

Set up ADK project

Set environment variables

Import modules and validate environment

Create Composio client and Tool Router session

Set up the McpToolset and create the Agent

Run the agent

Complete Code

Conclusion

How to build Todoist MCP Agent with another framework

ChatGPT

OpenAI Agents SDK

Claude Agent SDK

Claude Code

Claude Cowork

Codex

Cursor

OpenClaw

Hermes

CLI

LangChain

Vercel AI SDK

Mastra AI

LlamaIndex

CrewAI

OpenCode

VS Code

Explore Other Toolkits

Google Sheets

Notion

Airtable

FAQ

What are the differences in Tool Router MCP and Todoist MCP?

Can I use Tool Router MCP with Google ADK?

Can I manage the permissions and scopes for Todoist while using Tool Router?

How safe is my data with Composio Tool Router?

Used by agents from

Never worry about agent reliability