What is Google Calander Mcp Server

Google Calendar MCP Server is an AI-powered personal assistant that syncs your thoughts to Google Calendar and Google Docs, transforming natural language into organized agendas, reminders, and journals.

Use cases

Use cases include scheduling meetings, setting reminders for important tasks, journaling weekly reflections, and automating the creation of structured documents based on user input.

How to use

To use Google Calendar MCP Server, you can input natural language commands through the Command Line Interface, RESTful API, or Webhooks, which will then be processed to create events, reminders, and documents accordingly.

Key features

Key features include natural-language agenda parsing, Google Docs journaling, customizable reminders, model flexibility allowing integration of various LLMs, and a privacy-first approach that allows self-hosting and full control over data.

Where to use

Google Calendar MCP Server can be used in personal productivity, project management, and any scenario where organization of tasks and reminders is essential.

Google Calendar MCP Server

Your personal AI-powered assistant for Google Calendar and Google Docs.

Google Calendar MCP is an open-source server that turns natural language into structured schedules and notes. Powered by modern LLMs and Model Control Protocol (MCP), it helps you plan, remember, and reflect—automatically.

Features

• Natural-language agenda parsing
  “Meet Sam for coffee at 2PM next Thursday” → Google Calendar event + reminders

• Google Docs journaling
  “Write a weekly reflection every Sunday” → Auto-generated doc + timestamped entry

• Reminders that work
  Auto-set reminders: 1 day and 1 hour before events (or customize your own)

• Model-flexible (GPT, Claude, Gemini)
  Bring your own LLM and plug it in via adapters

• Privacy-first
  Self-hostable with full control over your data and APIs

Architecture Documentation

This repository contains comprehensive architecture documentation for the Google Calendar MCP server:

• Architecture Overview - System architecture, components, and data flow
• Technology Stack - Detailed technology recommendations and rationale
• File Structure - Recommended project organization
• Module Details - Implementation guidance for core modules
• Data Flows - Sequence diagrams of key system interactions

System Architecture

Google Calendar MCP follows a modular architecture with clear boundaries between components:

graph TB
    subgraph "Client Layer"
        CLI[Command Line Interface]
        API[RESTful API]
        WH[Webhooks]
    end

    subgraph "Core Layer"
        Router[MCP Router]
        Auth[Authentication Module]
        NLP[Natural Language Parser]
        Memory[Memory Module]
        Queue[Task Queue]
    end

    subgraph "Integration Layer"
        Calendar[Google Calendar Integration]
        Docs[Google Docs Integration]
    end

    subgraph "Model Layer"
        ModelRouter[AI Model Router]
        GPT[GPT-4o Adapter]
        Claude[Claude Adapter]
        Gemini[Gemini Adapter]
    end

    subgraph "Infrastructure Layer"
        DB[(Database)]
        Cache[(Cache)]
        Scheduler[Cron Scheduler]
    end

    %% Core connections
    CLI --> Router
    API --> Router
    WH --> Router
    Router --> Auth
    Router --> NLP
    Router --> Calendar
    Router --> Docs
    Router --> Memory
    Router --> Queue
    NLP --> ModelRouter
    ModelRouter --> GPT
    ModelRouter --> Claude
    ModelRouter --> Gemini

Quick Start

Prerequisites

• Node.js (v18 or higher)
• npm or yarn
• MongoDB (optional for local development)
• Redis (optional for local development)

Installation

1. Clone the repository:

git clone https://github.com/yourusername/google-calendar-mcp-server.git
cd google-calendar-mcp-server

2. Install dependencies:

npm install

3. Set up environment variables:

cp .env.example .env

Edit the .env file with your specific settings.

4. Build the project:

npm run build

5. Start the server:

npm start

For development:

npm run dev

OAuth Setup

1. Go to the Google Cloud Console
2. Create a new project
3. Enable the Google Calendar API and Google Docs API
4. Set up OAuth consent screen
5. Create OAuth 2.0 credentials
6. Add the credentials to your .env file

Technology Stack

• Runtime: Node.js with TypeScript
• Framework: Express.js
• Database: MongoDB
• Cache: Redis
• Queue: Bull
• LLM Framework: LangChain.js
• Authentication: OAuth2.0
• Containerization: Docker & Docker Compose

For more details on technology choices, see the Technology Stack documentation.

Development Roadmap

• [x] Architecture documentation
• [x] Initial project setup
• [ ] Core module implementation
• [ ] Google API integrations
• [ ] Model adapters
• [ ] Client interfaces
• [ ] Scheduler implementation
• [ ] Testing and security review
• [ ] Deployment guides

Contributing

Contributions are welcome! Please read our Contributing Guide for details on our code of conduct and the process for submitting pull requests.

License

This project is licensed under the MIT License - see the LICENSE file for details.