gccli

name	gccli
description	Google Calendar CLI for listing calendars, viewing/creating/updating events, and checking availability. Triggers: Google Calendar, calendar event, schedule meeting, check availability, create event, calendar freebusy, gccli.
compatibility	Requires Google OAuth credentials configured via gccli setup
allowed-tools	Bash(gccli:*)
metadata	{"version":"1.0","author":"canvas-studios"}

Google Calendar CLI

Command-line interface for Google Calendar operations.

Installation

In Canvas Notebook Docker, a container admin installs this once:

npm install -g @mariozechner/gccli

Check if installed:

gccli --help

Setup

Google Cloud Console (one-time)

1. Create a new project (or select existing)
2. Enable the Google Calendar API
3. Set app name in OAuth branding
4. Add test users (all Gmail addresses you want to use)
5. Create OAuth client:
   • Click "Create Client"
   • Application type: "Desktop app"
   • Download the JSON file

Configure gccli

First check if already configured:

gccli accounts list

If no accounts, guide the user through setup:

1. Ask if they have a Google Cloud project with Calendar API enabled
2. If not, walk them through the Google Cloud Console steps above
3. Have them download the OAuth credentials JSON
4. Run: gccli accounts credentials ~/path/to/credentials.json
5. Run: gccli accounts add <email> (use --manual for browserless OAuth)

Usage

Run gccli --help for full command reference.

Common operations:

• gccli <email> calendars - List all calendars
• gccli <email> events <calendarId> [--from <dt>] [--to <dt>] - List events
• gccli <email> event <calendarId> <eventId> - Get event details
• gccli <email> create <calendarId> --summary <s> --start <dt> --end <dt> - Create event
• gccli <email> freebusy <calendarIds> --from <dt> --to <dt> - Check availability

Use primary as calendarId for the main calendar.

Date/Time Format

• Timed events: YYYY-MM-DDTHH:MM:SSZ (UTC) or YYYY-MM-DDTHH:MM:SS (local)
• All-day events: YYYY-MM-DD with --all-day flag

Data Storage

• ~/.gccli/credentials.json - OAuth client credentials
• ~/.gccli/accounts.json - Account tokens