Google Workspace MCP Server

A Model Context Protocol (MCP) server that provides tools for interacting with Gmail and Calendar APIs. This server enables you to manage your emails and calendar events programmatically through the MCP interface.

Features

Gmail Tools

• list_emails: List recent emails from your inbox with optional filtering
• search_emails: Advanced email search with Gmail query syntax
• send_email: Send new emails with support for CC and BCC
• modify_email: Modify email labels (archive, trash, mark read/unread)

Calendar Tools

• list_events: List upcoming calendar events with date range filtering
• create_event: Create new calendar events with attendees
• update_event: Update existing calendar events
• delete_event: Delete calendar events

Prerequisites

1. Node.js: Install Node.js version 14 or higher
2. Google Cloud Console Setup:
   • Go to Google Cloud Console
   • Create a new project or select an existing one
   • Enable the Gmail API and Google Calendar API:
     1. Go to "APIs & Services" > "Library"
     2. Search for and enable "Gmail API"
     3. Search for and enable "Google Calendar API"
   • Set up OAuth 2.0 credentials:
     1. Go to "APIs & Services" > "Credentials"
     2. Click "Create Credentials" > "OAuth client ID"
     3. Choose "Web application"
     4. Set "Authorized redirect URIs" to include: http://localhost:4100/code
     5. Note down the Client ID and Client Secret

Setup Instructions

1. Clone and Install:

   git clone https://github.com/epaproditus/google-workspace-mcp-server.git
   cd google-workspace-mcp-server
   npm install

2. Create OAuth Credentials: Create a credentials.json file in the root directory:

   {
       "web": {
           "client_id": "YOUR_CLIENT_ID",
           "client_secret": "YOUR_CLIENT_SECRET",
           "redirect_uris": ["http://localhost:4100/code"],
           "auth_uri": "https://accounts.google.com/o/oauth2/auth",
           "token_uri": "https://oauth2.googleapis.com/token"
       }
   }

3. Get Refresh Token:

   node get-refresh-token.js

   This will:

   • Open your browser for Google OAuth authentication
   • Request the following permissions:
     • https://www.googleapis.com/auth/gmail.modify
     • https://www.googleapis.com/auth/calendar
     • https://www.googleapis.com/auth/gmail.send
   • Save the credentials to token.json
   • Display the refresh token in the console

4. Configure MCP Settings: Add the server configuration to your MCP settings file:

   • For VSCode Claude extension: ~/Library/Application Support/Code/User/globalStorage/saoudrizwan.claude-dev/settings/cline_mcp_settings.json
   • For Claude desktop app: ~/Library/Application Support/Claude/claude_desktop_config.json

   Add this to the mcpServers object:

   {
     "mcpServers": {
       "google-workspace": {
         "command": "node",
         "args": ["/path/to/google-workspace-server/build/index.js"],
         "env": {
           "GOOGLE_CLIENT_ID": "your_client_id",
           "GOOGLE_CLIENT_SECRET": "your_client_secret",
           "GOOGLE_REFRESH_TOKEN": "your_refresh_token"
         }
       }
     }
   }

5. Build and Run:

   npm run build

Usage Examples

Gmail Operations

1. List Recent Emails:

   {
     "maxResults": 5,
     "query": "is:unread"
   }

2. Search Emails:

   {
     "query": "from:example@gmail.com has:attachment",
     "maxResults": 10
   }

3. Send Email:

   {
     "to": "recipient@example.com",
     "subject": "Hello",
     "body": "Message content",
     "cc": "cc@example.com",
     "bcc": "bcc@example.com"
   }

4. Modify Email:

   {
     "id": "message_id",
     "addLabels": ["UNREAD"],
     "removeLabels": ["INBOX"]
   }

Calendar Operations

1. List Events:

   {
     "maxResults": 10,
     "timeMin": "2024-01-01T00:00:00Z",
     "timeMax": "2024-12-31T23:59:59Z"
   }

2. Create Event:

   {
     "summary": "Team Meeting",
     "location": "Conference Room",
     "description": "Weekly sync-up",
     "start": "2024-01-24T10:00:00Z",
     "end": "2024-01-24T11:00:00Z",
     "attendees": ["colleague@example.com"]
   }

3. Update Event:

   {
     "eventId": "event_id",
     "summary": "Updated Meeting Title",
     "location": "Virtual",
     "start": "2024-01-24T11:00:00Z",
     "end": "2024-01-24T12:00:00Z"
   }

4. Delete Event:

   {
     "eventId": "event_id"
   }

Troubleshooting

1. Authentication Issues:

   • Ensure all required OAuth scopes are granted
   • Verify client ID and secret are correct
   • Check if refresh token is valid

2. API Errors:

   • Check Google Cloud Console for API quotas and limits
   • Ensure APIs are enabled for your project
   • Verify request parameters match the required format

License

This project is licensed under the MIT License.