Lumman

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

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

3 tools

You ask

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

Multi Calendar does

  1. 1

    Finds the circle you share with Tom

    circles_list
  2. 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. 3

    Books Tuesday 14:00 and invites Tom

    events_create

Adding it

3 steps
  1. 1

    Add to Claude

    Press Add to Claude here. Claude opens a small window on this site.
  2. 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. 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.