Use AssistCall with Google Calendar

AssistCall answers your business calls 24/7 and can send each call, message and booking to Google Calendar through Webhook, Zapier, Make, n8n.

Google Calendar: Google's online calendar, included with Gmail and Google Workspace, which many small businesses use to track appointments, jobs and staff schedules.

Connects

Example call

A caller asks for a Thursday 10am estimate. The receptionist takes the booking and AssistCall sends an appointment.booked event to Zapier, which creates the event in Google Calendar. The owner sees it on their phone, with the call summary in the event notes.

When AssistCall books an appointment, a Zap uses Google Calendar's Create Detailed Event action to add it with the caller's name, number and reason.
When a caller cancels on the phone, a Make scenario searches the calendar for the matching event and deletes it.
When a caller leaves an urgent message, an n8n workflow puts a callback block on the owner's calendar with the message details.

How it connects

Webhook: Signed JSON for every call, message and booking, sent to any HTTPS URL you choose.
Zapier: Send AssistCall events to a Zap (Webhooks by Zapier, Catch Hook), then use the app's Zapier actions. Needs a paid Zapier plan.
Make: Start a Make scenario with a custom webhook and use the app's Make modules.
n8n: Start an n8n workflow with a webhook node, then call the app with its node or an HTTP request.
Call forwarding: Forward your business line to AssistCall when busy, after hours or always. Works with any carrier.

About Google Calendar's API

Self-serve API: you can create a key in your account
Style: REST
Authentication: OAuth 2.0 (API keys can only read public calendars)
On Zapier: yes. On Make: yes.

Any Google account can create a Google Cloud project and OAuth client, and the API is free within Google's quotas. Private calendars need OAuth 2.0 access tokens, which expire, so AssistCall connects to Google Calendar through Zapier, Make or n8n instead of live lookups during a call. Push notifications go to an HTTPS address, and the channels have to be renewed by hand before they expire.

Not included: no one-click Google Calendar app, no listing in Google Calendar's marketplace, no two-way sync, and no partnership with Google.

Researched by the AssistCall team and checked against Google's public pages on October 24, 2026. Google Calendar is a trademark of Google. AssistCall is an independent product of Starling Global LLC and is not affiliated with, endorsed by, sponsored by or approved by Google.

More Calendars and scheduling integrations

Calendly: Online scheduling links that let clients pick an open time on your calendar, used by consultants, coaches, sales teams and service businesses.
Microsoft Outlook Calendar: The calendar in Outlook and Microsoft 365, used by offices that run their email, meetings and scheduling on Microsoft 365.
Square Appointments: Square's booking and payments app for appointment businesses such as salons, barbershops, spas and wellness studios.
Acuity Scheduling: Online appointment scheduling from Squarespace with intake forms, packages and payments, used by solo practitioners and small service teams.
Cal.com: Open-source scheduling links and booking pages, hosted or self-hosted, used by consultants, agencies and software teams.
Microsoft Bookings: Microsoft 365's booking pages and shared appointment calendar for teams, connected to Outlook and Teams.

All product and company names in this directory are trademarks or registered trademarks of their respective owners, used only to identify systems AssistCall can send call information to or receive information from. Their use does not imply any affiliation with or endorsement by their owners. AssistCall connects using signed webhooks, the business's own API keys, automation platforms (Zapier, Make, n8n) the business sets up in its own account, and call forwarding. AssistCall does not provide one-click connectors, marketplace apps, certifications or two-way record or calendar sync, and does not sign HIPAA business associate agreements. Vendor features, plans and API access can change; information last checked October 24, 2026.