nextcloud-mcp-server/docs/calendar.md

Calendar App

Calendar Tools

Tool	Description
nc_calendar_list_calendars	List all available calendars for the user
nc_calendar_create_event	Create a comprehensive calendar event with full feature support (recurring, reminders, attendees, etc.)
nc_calendar_list_events	Enhanced: List events with advanced filtering (min attendees, duration, categories, status, search across all calendars)
nc_calendar_get_event	Get detailed information about a specific event
nc_calendar_update_event	Update any aspect of an existing event
nc_calendar_delete_event	Delete a calendar event
nc_calendar_create_meeting	Quick meeting creation with smart defaults
nc_calendar_get_upcoming_events	Get upcoming events in the next N days
nc_calendar_find_availability	New: Intelligent availability finder - find free time slots for meetings with attendee conflict detection
nc_calendar_bulk_operations	New: Bulk update, delete, or move events matching filter criteria
nc_calendar_manage_calendar	New: Create, delete, and manage calendar properties

Calendar Integration

The server provides comprehensive calendar integration through CalDAV, enabling you to:

• List all available calendars
• Create, read, update, and delete calendar events
• Handle recurring events with RRULE support
• Manage event reminders and notifications
• Support all-day and timed events
• Handle attendees and meeting invitations
• Organize events with categories and priorities

Usage Examples:

# List available calendars
calendars = await nc_calendar_list_calendars()

# Create a simple event
await nc_calendar_create_event(
    calendar_name="personal",
    title="Team Meeting", 
    start_datetime="2025-07-28T14:00:00",
    end_datetime="2025-07-28T15:00:00",
    description="Weekly team sync",
    location="Conference Room A"
)

# Create a recurring weekly meeting
await nc_calendar_create_event(
    calendar_name="work",
    title="Weekly Standup",
    start_datetime="2025-07-28T09:00:00", 
    end_datetime="2025-07-28T09:30:00",
    recurring=True,
    recurrence_rule="FREQ=WEEKLY;BYDAY=MO"
)

# Quick meeting creation
await nc_calendar_create_meeting(
    title="Client Call",
    date="2025-07-28",
    time="15:00",
    duration_minutes=60,
    attendees="client@example.com,colleague@company.com"
)

# Get upcoming events  
events = await nc_calendar_get_upcoming_events(days_ahead=7)

# Advanced search - find all meetings with 5+ attendees lasting 2+ hours
long_meetings = await nc_calendar_list_events(
    calendar_name="",  # Search all calendars
    search_all_calendars=True,
    start_date="2025-07-01",
    end_date="2025-07-31", 
    min_attendees=5,
    min_duration_minutes=120,
    title_contains="meeting"
)

# Find availability for a 1-hour meeting with specific attendees
availability = await nc_calendar_find_availability(
    duration_minutes=60,
    attendees="sarah@company.com,mike@company.com",
    date_range_start="2025-07-28",
    date_range_end="2025-08-04",
    business_hours_only=True,
    exclude_weekends=True,
    preferred_times="09:00-12:00,14:00-17:00"
)

# Bulk update all team meetings to new location
bulk_result = await nc_calendar_bulk_operations(
    operation="update",
    title_contains="team meeting",
    start_date="2025-08-01", 
    end_date="2025-08-31",
    new_location="Conference Room B",
    new_reminder_minutes=15
)

# Create a new project calendar
new_calendar = await nc_calendar_manage_calendar(
    action="create",
    calendar_name="project-alpha",
    display_name="Project Alpha Calendar",
    description="Calendar for Project Alpha team",
    color="#FF5722"
)