Calendar MCP Server

MCP Server for the Calendar API.

Tools

1. calendar_list_calendars

   • List all your available calendars

   • Returns: List of calendars (with id and name)

2. calendar_list_events

   • Search events in your calendar

   • Required inputs:

     • from (string): Start time (eg. 2025-05-28 12:00:00)

     • to (string): End time (eg. 2025-05-28 13:00:00)

   • Optional inputs:

     • calendar_id (string): Calendar identifier (defaults to primary calendar if omitted)

   • Returns: List of events. Events booking a room include bookable_resource_name.

3. calendar_get_event

   • Get a single event by ID

   • Required inputs:

     • event_id (string): The ID of the event to retrieve

   • Returns: The event. Includes bookable_resource_name when the event books a room.

4. calendar_create_event

   • Create a event in your calendar

   • Required inputs:

     • title (string): The event title

     • start (string): The event starting date (eg. 2025-05-28 12:00:00)

     • end (string): The event ending date (eg. 2025-05-28 13:00:00)

   • Optional inputs:

     • description (string): Event description

     • attendees (string): JSON array of attendee emails

     • rrule (string): Recurrence rule in RFC 5545 format (e.g. FREQ=WEEKLY;INTERVAL=1;BYDAY=MO, FREQ=DAILY, FREQ=MONTHLY;BYMONTHDAY=15)

     • calendar_id (string): Calendar identifier (defaults to primary calendar if omitted)

   • Returns: The created event

   • Notes: Attendees listed in attendees receive an actionable invitation email (accept/decline in one click).

5. calendar_update_event

   • Update an existing event in your calendar

   • Required inputs:

     • event_id (string): The ID of the event to update

   • Optional inputs:

     • title (string): The event title

     • start (string): The event starting date (eg. 2025-05-28 12:00:00)

     • end (string): The event ending date (eg. 2025-05-28 13:00:00)

     • description (string): Event description

     • attendees (string): JSON array of attendee emails

     • rrule (string): Recurrence rule in RFC 5545 format (e.g. FREQ=WEEKLY;INTERVAL=1;BYDAY=MO, FREQ=DAILY, FREQ=MONTHLY;BYMONTHDAY=15). Use empty string to remove recurrence.

     • calendar_id (string): Calendar identifier (defaults to event's calendar if omitted)

     • notify_attendees (boolean): Send the updated invitation to attendees via email (defaults to false)

   • Returns: The updated event

6. calendar_delete_event

   • Delete an event from your calendar

   • Required inputs:

     • event_id (string): The ID of the event to delete

   • Optional inputs:

     • calendar_id (string): Calendar identifier (defaults to primary calendar if omitted)

     • notify_attendees (boolean): Send a cancellation to attendees via email (defaults to false)

   • Returns: The deleted event

Related MCP server: Google Calendar MCP Server

Date & time

All date inputs are interpreted in your profile timezone (the one set in your Infomaniak account), and event times always match the wall clock you provide regardless of the machine running the server:

• 2025-05-28 12:00:00 (or 2025-05-28T12:00:00) means 12:00 in your profile timezone

• 2025-05-28 means midnight (00:00:00) in your profile timezone

• 2025-05-28T10:00:00Z or 2025-05-28T12:00:00+02:00 (ISO with offset) are converted to your profile timezone

No TZ environment variable is required.

Setup

1. Create a calendar token linked to your user:

   • Visit the API Token page

   • Choose "workspace:calendar user_info" scopes

Usage with Claude Desktop

Add the following to your claude_desktop_config.json:

NPX

{
  "mcpServers": {
    "calendar": {
      "command": "npx",
      "args": [
        "-y",
        "@infomaniak/mcp-server-calendar"
      ],
      "env": {
        "CALENDAR_TOKEN": "your-token"
      }
    }
  }
}

docker

{
  "mcpServers": {
    "calendar": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "CALENDAR_TOKEN",
        "infomaniak/mcp-server-calendar"
      ],
      "env": {
        "CALENDAR_TOKEN": "your-token"
      }
    }
  }
}

Environment Variables

1. CALENDAR_TOKEN: Required. Your calendar token.

Troubleshooting

If you encounter permission errors, verify that:

1. All required scopes are added to your calendar token

2. The token is correctly copied to your configuration

Build

Docker build:

docker build -t infomaniak/mcp-server-calendar -f Dockerfile .

License

This MCP server is licensed under the MIT License.