Google Workspace MCP Server

Owner: David Pak

A Model Context Protocol (MCP) server that provides AI assistants with access to Google Calendar and Gmail APIs. This server enables AI assistants like Ada to manage your calendar events and email seamlessly.

Features

📅 Google Calendar Integration

• List Calendars: View all available calendars

• List Events: Retrieve events with filtering by date range, calendar, etc.

• Create Events: Schedule single events with automatic color coding

• Create Recurring Events: Schedule recurring events using RRULE patterns

• Smart Color Coding: Automatic event color suggestions based on content

📧 Gmail Integration

• List Emails: Retrieve emails with advanced filtering

• Get Email Content: Fetch full email content and metadata

• Send Emails: Compose and send emails with CC/BCC support

• Search Emails: Use Gmail's powerful search syntax

• Email Summarization: AI automatically summarizes email content

Related MCP server: Gmail MCP Server

Prerequisites

1. Node.js (v18.18 or higher)

2. Google Cloud Project with Calendar and Gmail APIs enabled

3. OAuth2 Credentials downloaded as credentials.json

Setup

1. Clone the repository:

   git clone <your-repo-url>
   cd google-cal-cli

2. Install dependencies:

   npm install

3. Set up Google Cloud:

   • Create a Google Cloud project

   • Enable Calendar API and Gmail API

   • Create OAuth2 credentials (Desktop application)

   • Download credentials as credentials.json in the project root

4. Environment variables: Create a .env file with:

   OPENAI_API_KEY=your_openai_api_key_here

5. Build the project:

   npm run build

Usage

Start the MCP Server

npm run mcp

Start the Chat Client

npm run chat

Development Mode

npm run dev

API Scopes

The server requests the following Google API scopes:

• https://www.googleapis.com/auth/calendar - Full calendar access

• https://www.googleapis.com/auth/gmail.readonly - Read Gmail access

• https://www.googleapis.com/auth/gmail.send - Send Gmail access

Available Tools

Calendar Tools

• list_calendars - List available calendars

• list_events - List events with filtering

• create_event - Create single events

• create_recurring_event - Create recurring events

Gmail Tools

• list_emails - List emails with filtering

• get_email - Retrieve email content

• send_email - Send emails

• search_emails - Search emails with Gmail syntax

Color Coding

Events are automatically color-coded based on content:

• Work/Professional: Blue tones (9=Blueberry, 7=Peacock, 8=Graphite)

• Social/Fun: Pink/Red tones (4=Flamingo, 11=Tomato, 3=Grape)

• Health/Wellness: Green tones (10=Basil, 2=Sage)

• Learning/Education: Yellow/Orange tones (5=Banana, 6=Tangerine)

• Travel: 7=Peacock

• Default: 1=Lavender

Gmail Search Syntax

Use Gmail's powerful search operators:

• from:example@gmail.com - Emails from specific sender

• subject:meeting - Emails with specific subject

• is:unread - Unread emails

• has:attachment - Emails with attachments

• label:important - Emails with specific labels

Project Structure

├── src/
│   ├── google-mcp-server.ts    # Main MCP server
│   └── chat.ts                 # Chat client
├── dist/                       # Built JavaScript files
├── credentials.json            # Google OAuth credentials (not in repo)
├── token.json                  # OAuth tokens (not in repo)
├── .env                        # Environment variables (not in repo)
└── package.json               # Dependencies and scripts

Contributing

1. Fork the repository

2. Create a feature branch

3. Make your changes

4. Test thoroughly

5. Submit a pull request

License

This project is licensed under the MIT License.

Security Note

Never commit credentials.json, token.json, or .env files to version control. These files contain sensitive authentication information.