How to Connect Multiple Google Calendars to Claude
Claude can see shared calendars on the Google account you connected. It cannot hold a second Google login on that same connector. Those are two different limits: one person may have work and personal Google identities, while a single identity may contain primary, team, family, and subscribed calendars. Carly connects the identities separately and preserves the calendar names, so Claude or Cowork can work across the whole set through one connection.
First identify which kind of “multiple” you have
| Your setup | What it means |
|---|---|
| Work and personal Google logins | Multiple Google accounts, each with its own authorization |
| Primary, team, and family calendars under one login | Multiple calendars inside one Google account |
| Calendar shared to your account | A separate calendar reached through your current identity |
| Subscribed ICS calendar | Usually read-only and owned elsewhere |
Anthropic’s Google Workspace connector help says Claude can access Calendar data for “the Google account you’ve connected.” It also says Claude can “view events and calendars, including shared calendars you have access to,” and can create, update, and delete events on that account.
That covers secondary and shared calendars under one login. It does not add a second Google identity. Connecting another Google account replaces the first.
One connector, one account. That is the shape across ChatGPT, Claude, and Gemini: the Gmail or Google Workspace connection authorizes a single identity, so a second account overwrites the first instead of sitting beside it. Anyone running a personal address and a work address does the disconnect-and-reconnect dance to move between them.
On Team and Enterprise, an Owner must enable the Google connector before anyone can authenticate.
What Claude can write on the connected account
On the connected Google Calendar, Claude can:
- create, update, and delete events
- find mutual availability
- manage attendees
- accept, decline, or mark tentative
- set up recurring meetings
Each action still needs your approval in the conversation. A scheduled Cowork task can read; treat writes as something you watch.
A second personal Google calendar that lives on a different login is not in that list until you add Carly.
1. Give every account and calendar a role
For example, all fictional:
| Google address | Calendar | Role |
|---|---|---|
fictional.maya.lopez@gmail.com | Maya Lopez | Personal |
fictional.maya.lopez@airbnb.com | Maya Lopez | Main Company |
fictional.maya.lopez@airbnb.com | Product Launch | Team |
fictional.maya.lopez@sony.com | Maya Lopez | Client |
The calendar name matters when one account owns several. The full Google address matters when the same calendar name exists in two identities.
2. Connect each Google account to Carly
- Sign in at carlyassistant.com.
- Open carlyassistant.com/integrations.
- Find Google Calendar and click Connect.
- Choose the first Google account and approve access.
- Return to the integrations page and select Google Calendar → Connect again.
- Choose Use another account if Google preselects the first identity.
- Confirm the full address and its calendars before adding the next account.
Carly calculates availability across Google Calendar and Outlook at the same time, while each event stays on its original calendar.
3. Add Carly to Claude
- Open Customize in the sidebar.
- Select Connectors.
- Click +, then Add custom connector.
- Paste
https://carlyassistant.com/mcp/. - Click Add and authorize your Carly account.
- In chat or in a Cowork task, open + → Connectors and enable Carly.
Anthropic documents this path in its remote MCP connector guide. On Team and Enterprise, an Owner adds the connector to the organization first. Free plans are limited to one custom connector.
4. Test every calendar before changing one
Use an event whose location you already know:
In the Personal calendar under
fictional.maya.lopez@gmail.com, find the next event containing “dentist.” State the account and calendar. Do not change it.
In the Product Launch calendar under
fictional.maya.lopez@airbnb.com, list events next Tuesday. State the source calendar and do not edit anything.
Then test the combined view:
Check every example calendar for conflicts Thursday from 1:00 to 4:00 PM Eastern. Include the full account and calendar name for each conflict.
5. Reuse this calendar-routing prompt
Treat
fictional.maya.lopez@gmail.comas Personal,fictional.maya.lopez@airbnb.comas Main Company, andfictional.maya.lopez@sony.comas Client. Always state the target address and calendar before changing an event. Wait for approval before creates, updates, moves, or deletions.
Then specify both layers:
Create the approved hold on the Main Company primary calendar only. Do not add it to Personal or Client.
Move the event on the Product Launch team calendar. Do not change the similarly named event on the primary calendar.
Claude Google Calendar next to Carly
| Need | Native Google Calendar connector | Carly |
|---|---|---|
| Read a connected Google account | Yes | Yes |
| Shared calendars under that account | Yes | Yes |
| Keep two Google identities connected | No | Yes |
| Compare work and personal availability | Not in one native connection | Yes |
| Create, update, or delete an event | Yes, on the connected account, with approval | Yes, with the calendar’s permissions |
Carly offers free Zapier-style workflows; AI agents start at $35/month.
Quick fixes
| Problem | Fix |
|---|---|
| A secondary calendar is missing | Name it explicitly; Claude’s native connector should see shared calendars on the connected account |
| Second Google account replaced the first | Keep each identity connected in Carly instead of switching the native connector |
| Carly is installed but unused | Enable it under + → Connectors for this chat or Cowork task |
| Team plan cannot add the URL | Ask the Claude Owner to add the custom connector |
| Event landed on the wrong calendar | Require both the full address and calendar name before approval |
Frequently asked questions
Can Claude connect two Google Calendar accounts?
Not natively. The Google connector is one identity. Shared calendars under that identity are supported. A second Google login requires Carly or a reconnect that drops the first account.
Can Claude read secondary Google Calendars?
Yes, on the connected account. Anthropic documents viewing events “including shared calendars you have access to.”
Can Claude create Google Calendar events?
Yes, on the connected account. Create, update, and delete are documented. Claude asks before acting.
Can Claude check work and personal Google Calendars in one chat?
Not with the native connector. Connect both identities to Carly, add Carly to Claude, and name the target account on every write.
Related: Claude + Google Calendar · How to manage multiple Google Calendars · Best AI assistants for Google Calendar · Multiple Gmail accounts in Claude Cowork · Carly’s Google Calendar integration
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