Google Calendar CLI#

A single-file CLI for Google Calendar using only Python 3 standard library.

Setup#

1. Create a Google Cloud project and enable the Google Calendar API.

2. Create OAuth 2.0 credentials (Desktop app). Note the client ID and secret.

3. Obtain a refresh token via the OAuth consent flow.

4. Export credentials: bash

   export GOOGLE_CLIENT_ID=...
   export GOOGLE_CLIENT_SECRET=...
   export GOOGLE_REFRESH_TOKEN=...
   export GOOGLE_CALENDAR_ID=primary  # optional, defaults to "primary"
   
   

Usage#

text

google-calendar-cli.py <command> [options]

CommandDescriptionlistList upcoming eventstodayShow today's eventsaddCreate a new eventupdateUpdate an existing eventdeleteDelete an event

Credentials can also be passed as flags ( --client-id, --client-secret, --refresh-token, --calendar-id).

Use --json for raw JSON output. Run with -h for full help.

Examples#

bash

# List next 10 events
python3 {baseDir}/scripts/google-calendar-cli.py list

# Today's events
python3 {baseDir}/scripts/google-calendar-cli.py today

# Events in a date range
python3 {baseDir}/scripts/google-calendar-cli.py list --from 2025-06-01T00:00:00Z --to 2025-06-30T23:59:59Z

# Add an event
python3 {baseDir}/scripts/google-calendar-cli.py add --title "Meeting" \
    --start 2025-06-01T09:00:00-07:00 --end 2025-06-01T10:00:00-07:00

# Update an event
python3 {baseDir}/scripts/google-calendar-cli.py update --event-id EVENT_ID --title "New Title"

# Delete an event
python3 {baseDir}/scripts/google-calendar-cli.py delete --event-id EVENT_ID