MCP Google Calendar Plus

A server for full Google Calendar management, including creating, updating, and deleting events. Requires Google OAuth2 authentication.

The ONLY comprehensive MCP server for Google Workspace that enables Claude, Cursor, Windsurf and other AI systems to fully manage Google Calendar, Contacts, AND Gmail- read, create, update, delete, and organize across all three services!

Complete Google Workspace integration for Claude Desktop and other AI agents using the Model Context Protocol (MCP). This server provides comprehensive management capabilities for Calendar, Contacts, and Gmail with OAuth2 authentication.

Other calendar MCP servers only provideread-onlyaccess. This is theonly MCP serverthat gives AI systems like Claude, Cursor, and Windsurf the ability to:

- ✅Createnew calendar events
- ✅Updateexisting events (including recurring events)
- ✅Deleteevents
- ✅Managemultiple calendars
- ✅Check availabilityacross calendars

- ✅Listand search contacts
- ✅Createnew contacts with full details
- ✅Updateexisting contacts
- ✅Deletecontacts
- ✅Managecontact details (emails, phones, addresses, organizations)

- ✅Searchand list emails with powerful queries
- ✅Readfull email content with attachments
- ✅Sendnew emails and replies
- ✅Organizewith labels and folders
- ✅Updateemail status (read/unread, starred, important)
- ✅Createand manage drafts
- ✅Batch operationsfor bulk email management

- Multi-Calendar Support: List events from multiple calendars simultaneously
- Event Management: Create, update (including notifications), delete, and search calendar events
- Recurring Events: Advanced modification scopes for recurring events (single instance, all instances, or future instances only)
- Calendar Management: List calendars and their properties
- Free/Busy Queries: Check availability across calendars

- Contact Search: Search contacts by name, email, or other criteria
- Full Contact Details: Manage names, emails, phone numbers, addresses, organizations, and notes
- Batch Operations: List contacts with pagination support
- Field Selection: Choose which contact fields to retrieve for optimized responses

- Advanced Search: Use Gmail's powerful search operators
- Email Management: Read, send, reply, forward, and delete emails
- Label Organization: Create and manage labels/folders
- Draft Management: Create, update, and send drafts
- Batch Operations: Update multiple emails at once
- Thread Support: Handle email conversations
- Attachment Info: View attachment details (names, sizes, types)

- OAuth2 Authentication: Secure authentication with automatic token refresh
- Unified Permissions: Single authentication flow for Calendar, Contacts, and Gmail access
- Go toGoogle Cloud Console
- Create a new project or select an existing one
- Enable these APIs:

- Google Calendar API
- Google People API

{ "mcpServers": { "google-workspace": { "command": "npx", "args": ["-y", "mcp-google"], "env": { "GOOGLE_CLIENT_ID": "YOUR_CLIENT_ID.apps.googleusercontent.com", "GOOGLE_CLIENT_SECRET": "YOUR_CLIENT_SECRET" } } } }

Option B: Use Downloaded Google Credentials File

{ "mcpServers": { "google-workspace": { "command": "npx", "args": ["-y", "mcp-google"], "env": { "GOOGLE_OAUTH_CREDENTIALS": "/path/to/downloaded/credentials.json" } } } }

Just use the file path where you saved the JSON file downloaded from Google Cloud Console.
- Restart Claude Desktop
- The MCP server will open a browser window for authentication
- Log in with your Google account and grant Calendar, Contacts, AND Gmail permissions
- Tokens will be saved securely for future use

Note:If upgrading from a previous version, you'll need to re-authenticate to grant the new Gmail permissions.

- GOOGLE_OAUTH_CREDENTIALS: Path to OAuth credentials JSON file
- GOOGLE_CALENDAR_MCP_TOKEN_PATH: Custom path for token storage (optional)
- NODE_ENV: Set to "production" for production use

List all accessible calendars with their properties.

List events from one or more calendars with filtering options.

Create a new calendar event with support for:

- Single or recurring events
- Attendees and notifications
- Custom colors
- Time zones

- Modifying single instances of recurring events
- Changing event details
- Managing attendees

Search for events across calendars using text queries.

Query free/busy information across multiple calendars.

List and search contacts with pagination support.

Get detailed information about a specific contact.

- Names and nicknames
- Multiple email addresses
- Phone numbers
- Physical addresses
- Organizations and job titles
- Notes and biographies

Update existing contact information with field-specific updates.

Search and list emails with powerful Gmail queries.

Read full email content including body and attachments.

Send new emails or replies with HTML support.

Modify email properties (labels, read status, star, archive).

Move emails to trash or permanently delete.

Create new labels for organizing emails.

Perform bulk operations on multiple emails.

What times am I free tomorrow between 9am and 5pm?

Create a meeting called "Team Standup" tomorrow at 10am for 30 minutes

Find all events this week that mention "project review"

Change all future instances of my weekly team meeting to 2pm

Show me all my contacts with email addresses

Create a contact for John Doe, email: john@example.com, phone: 555-1234

Update Jane Smith's phone number to 555-5678

Show me all unread emails from this week

Send an email to john@example.com with subject "Meeting Tomorrow" and body "Let's meet at 2pm"

Mark all newsletters as read and archive them

Create a label called "Important Projects" and apply it to all emails from my manager

Move all emails older than 30 days to trash

- Ensure redirect URI matches exactly:http://localhost:3000/oauth2callback
- Check that both Calendar API and People API are enabled in Google Cloud Console
- Verify OAuth credentials are for a "Desktop app" type
- If upgrading from calendar-only, re-run authentication to grant contacts permissions

- Tokens are automatically refreshed
- If issues persist, delete the token file and re-authenticate

- Ensure you've granted all requested Calendar, Contacts, and Gmail permissions
- Check that the Google account has access to the resources you're trying to access
- Ensure all required APIs are enabled in your Google Cloud project:

- Google Calendar API
- Google People API
- Gmail API

- OAuth tokens are stored with restricted permissions (0600)
- Client secrets should never be committed to version control
- Use environment variables for sensitive configuration

# Install dependencies npm install # Build npm run build # Run locally npm start

Developed byBoris Djordjevicand the199 Longevityteam.

Built on top of the originalgoogle-calendar-mcpby nspady.

Contributions are welcome! Please open an issue or submit a pull request onGitHub.

Integrates with Google Calendar to manage events, reminders, and schedules using OAuth 2.0.