gcal-mcp
An MCP server that provides integration with Google Calendar, allowing users to list calendars and manage events. It enables searching, creating, and modifying calendar entries through tools designed for the Model Context Protocol.
README
gcal-mcp
MCP server for Google Calendar. Provides four tools: list calendars, list/search events, create events, and modify events.
Prerequisites
- uv
- A Google Cloud project with the Calendar API enabled
Google Cloud Setup
- Go to Google Cloud Console
- Create a project (or select an existing one)
- Enable the Google Calendar API
- Go to APIs & Services > Credentials
- Create an OAuth 2.0 Client ID of type Desktop App
- Download the credentials JSON and save it to
~/.config/gcal-mcp/credentials.json - Go to OAuth consent screen and add your Google account as a test user
Install & Authenticate
make install # install dependencies
make auth # opens browser for OAuth consent, prints calendars on success
Register with Claude Code
make register # adds gcal-mcp as a user-scoped MCP server
make unregister # removes it
Tools
| Tool | Description |
|---|---|
list_calendars |
List all accessible calendars |
list_events |
List or search events (supports time range, free-text query) |
create_event |
Create an event (supports attendees, location, description) |
modify_event |
Patch an existing event (only provided fields are updated) |
Date/time values accept YYYY-MM-DD for all-day events or ISO datetime (YYYY-MM-DDTHH:MM) for timed events.
File Locations
- Credentials:
~/.config/gcal-mcp/credentials.json - OAuth token:
~/.config/gcal-mcp/token.json
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