Calendar MCP server

Read from the package source without running it. The installed server may list more.

• add_attendee

  Invite one or more people to an existing event.

• analyze_busyness

  Summarise how loaded each day is: event count and total scheduled minutes.

• check_attendee_status

  Report who has accepted, declined or not yet answered an event invitation.

• create_calendarwrite action

  Create a new secondary calendar owned by the user.

• create_eventwrite action

  Create an event with explicit start and end times, and optional attendees.

• delete_eventwrite action

  Permanently delete an event. This cannot be undone.

• find_events

  Search a calendar for events, expanding recurring series into instances.

• list_calendars

  List the calendars the signed-in user can see, with their IDs and timezones.

• move_event

  Reschedule an event, and/or move it to a different calendar.

• project_recurring_events

  Compute future occurrences of recurring events from their recurrence rules.

• query_free_busy

  Get busy intervals for one or more calendars, without revealing event details.

• quick_add_eventwrite action

  Create an event from a plain-English phrase, parsed by Google.

• respond_to_event

  Set the user's own RSVP on an invitation they have received.

• schedule_mutual

  Find the first slot where everyone is free, then book the meeting there.

• update_eventwrite action

  Change fields on an existing event. Omitted fields are left untouched.

• Code scan10 source files scanned25/25
• –Live reliabilityno gateway calls yet and no remote to proben/a
• –Tool poisoningtools not inspected (local package is not executed); not countedn/a
• Auth qualitystatic API keys via environment variables6/15
• Maintenancelast push 14 days ago15/15
• Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10

Calendar: common questions

Is Calendar MCP server safe?

Mostly: it is graded B (83/100). Read the Calendar safety report

How do I install Calendar?

It runs on your machine. Copy the Claude Code, Claude Desktop or Cursor config from the install section.

Does Calendar need an API key?

Yes. The registry entry asks for GOOGLE_CLIENT_SECRET.

Is Calendar maintained?

The last commit was 15 days ago (2026-09-06). The latest release is v1.0.1.

What can I use instead of Calendar?

Servers from other publishers that do the same job: Agent-Native Calendar MCP server, Calendar Ics Reader Events Freebusy Conflicts MCP server and Google Drive MCP server. Compare all Calendar alternatives.