Option 1: Using the ClickSend SMS Add-on in Google Calendar
Get the free add-on here: [ClickSend SMS Add-on for Google Calendar]
Setup Instructions
Install the add-on to your Google Calendar.
Allow permissions when prompted during installation.
In Google Calendar, find the ClickSend icon on the right sidebar and click to open the panel.
Enter your:
Username – Your ClickSend login
API Key – Found in the ClickSend Dashboard
Click Save to connect.
Composing and Saving Messages
Write your SMS message directly in the add-on.
Click Save to make it your default message for future reminders.
A pop-up will confirm when the message has been saved.
Creating Events and Sending Reminders
Create a new event in your calendar.
Add the recipient’s phone number in the event title or description.
If both fields have numbers, the add-on prioritises the one in the description.
Click the event > Edit your message or leave the default > Click Set Reminder.
You can use local numbers (e.g., 0411111111) if your account has a default country code. For international numbers, use full format (e.g., +61411111111).
Monitoring and Managing Reminders
Scheduled and sent messages appear in your ClickSend dashboard history.
You can cancel unsent reminders via:
The ClickSend history, or
The event in your Google Calendar
Event Colours Explained
Colour | Meaning |
Blue | No reminder set |
Red | Reminder successfully set |
Purple | Reminder cancelled |
You can re-set reminders manually if needed.
Works in All Views
ClickSend SMS Add-on works in day, week, and month views of Google Calendar.
Option 2: Google Calendar Integration via Zapier
If you prefer automation, use Zapier to trigger SMS before an event starts.
Don’t have a Zapier account? [Create one here]
Zap Setup: Google Calendar → ClickSend SMS
Log in to Zapier and click Make a Zap!
Choose App & Event:
App: Google Calendar
Event: Event Start
Click Continue
Connect your Google Calendar:
Sign in and allow access
Click Continue
Test the trigger and click Continue
Set Up ClickSend as the Action
App: ClickSend SMS
Event: Send SMS
Connect your ClickSend account:
Enter your Username and API Key
Test the connection
Set up SMS details:
To: The phone number to receive the message
Message: Customise using event fields (e.g., Summary, Start Time)
From: Set as "Google Calendar" or your business name
Test & Finish:
Click Create & Continue
Name your Zap and turn it ON
Still Need Help?
Reach out via our 24/7 live chat and our team will be happy to assist with setup or troubleshooting.