# Multi Calendar

Every Outlook.com, Microsoft 365 and Google calendar you have, in one connector.

Free time across all of them, events, booking pages, circles and group polls.

[Add to Claude](https://claude.ai/directory/multi-calendar)

Free for every calendar you have. More booking pages and circles for $5 a month or $50 a year (£5 or £50 in the UK, €5 or €50 in the EU, VAT included).

- Works with: Claude (and ChatGPT)
- Calendars: Any number (Outlook.com, Microsoft 365, Google)
- Free: Every calendar (1 booking page, 1 circle)
- Plan: Any number (of booking pages and circles)
- Publisher: Lumman Ltd (London. Verified by Microsoft)
- Tools: 21 (within 3 permissions, each ticked per calendar account)

## One request, as it runs

You ask: “When are Tom and I both free for an hour next week? Book the first one.”

1. Finds the circle you share with Tom (`circles_list`)
2. Reads busy time across your 3 calendars and Tom's, and finds Tue 14:00, Wed 10:00 and Thu 16:30 (`circles_free_times_find`)
3. Books Tuesday 14:00 and invites Tom (`events_create`)

## Adding it

1. Add to Claude: Press Add to Claude here. Claude opens a small window on this site.
2. Sign in and add your calendars: Sign in to Lumman with Google, Microsoft, a passkey or an emailed code. Outlook.com and Microsoft 365 calendars connect with Microsoft, Google calendars with Google.
3. Ask: Claude finds free time, books and answers invitations, within the permission each calendar account has.

## Your calendars

- A circle sees only its members' busy times - never what their events say.
- Guests book on your own booking page, with no account of their own.

## Price

- Free: Every calendar. 1 booking page and 1 circle. No card.
- Plan: More booking pages and circles. $5 a month or $50 a year (£5 or £50 in the UK, €5 or €50 in the EU, VAT included). Switch monthly or yearly at any time. Cancel any time - the paid period runs to its end.

## Tools

- List calendars (`calendars_list`)
- Read events (`events_list`)
- Read an event (`events_get`)
- Find a time (`free_times_find`)
- Create an event (`events_create`)
- Change an event (`events_edit`)
- Cancel an event (`events_cancel`)
- Answer an invitation (`events_respond`)
- Read scheduling preferences (`preferences_get`)
- Change scheduling preferences (`preferences_set`)
- Show busy time everywhere (`busy_everywhere_set`)
- Make a booking link (`booking_links_create`)
- Set up a booking page (`booking_page_set`)
- Make a group poll (`polls_create`)
- Read a poll's answers (`polls_results`)
- Book a poll's time (`polls_book`)
- List open links and polls (`links_polls_list`)
- Close a link or poll (`links_polls_close`)
- Invite people into a circle (`circles_invite`)
- List circles (`circles_list`)
- Find a time for a circle (`circles_free_times_find`)

## Connect

Address for your AI client: https://lumman.co/mcp/calendar

### ChatGPT

1. On a paid plan: Settings > Security and login > Developer mode on.
2. Plugins > + > Create app > Create MCP App.
3. Name it, paste the address, tick the box, press Create.
4. Sign in and approve, then @-mention it in a chat.