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Kalender Sync by

Grok

Connect Grok to all your calendars

Kalender Sync connects Grok Build to all your calendars: Outlook, Google, Apple, GMX, WEB.DE and more. One command in the terminal is all it takes. The agent then finds free time and books events while you keep working.

Connect Grok now No credit card required.

Reaches these calendars

GoogleOutlookApple iCloudGMXWEB.DEmailbox.orgKSuitePosteoSTRATO

Run in your terminal, after creating the key in the app:

grok mcp add --transport http kalender-sync https://app.kalender-sync.de/mcp --header "Authorization: Bearer ksa_…"

How it works

Connect Grok
in 3 simple steps

01

Create an account and connect calendars

Sign up for Kalender Sync and connect the calendars Grok should know about. The first seven days include every feature, no credit card needed.

02

Create the access and key

In the app, open AI assistant, then Connect the assistant and Something else. You pick the calendars and their detail level, and Create key gives you your access key. It is shown only once, so treat it like a password.

03

Add the server to Grok Build

Run the command above with your key. Use grok mcp list to check the server is there. From then on the agent knows your schedule across every account.

grok mcp list

Features

What you get when Grok knows your calendar

Every calendar on one connection

Outlook, Google, Apple, GMX, WEB.DE, mailbox.org, kSuite, Posteo and STRATO come together in Kalender Sync. Grok needs a single entry, and credentials for the individual accounts never end up there.

From agent to assistant

The agent that already works for you in the terminal now also knows when you have time. It finds free blocks and books events without you switching windows.

What's left on my plate today? Block 2h for deep work. Move the call to 2pm.

You decide what it can see

For each calendar you choose between busy only, title and time, or full details. Whatever you don't share does not exist for Grok.

And you decide what it may do

Whether it only looks or also books is up to you, per calendar. Every call lands in the access log, and one click in the app revokes the key. Hosted in Germany.

Tutorial

How to grant calendars to Grok.

The video walks through it with Claude. Choosing calendars and detail levels works exactly the same for Grok, except that you finish by creating a key instead of signing in through the browser.

Read the guide
Connect Your AI Assistant to Your Calendar – Claude, Claude Code & ChatGPT | Kalender Sync

Clicking play loads YouTube. Data will be sent to Google.

Examples

What you can ask Grok

You stay in the session you are already working in and ask in plain sentences. Grok looks into the calendars you have shared.

See your day

Before you get stuck in, it pays to check how much of the day is still yours.

  • What's left on my plate today?
  • When is my next meeting?
  • How busy is Thursday?

Find time in one block

Focused work needs a real block, not a gap.

  • Where do I have two quiet hours this week?
  • When am I free tomorrow?
  • Find a window for the release.

Book events

If you allowed creating events, the event ends up in the right calendar.

  • Move the call to 2pm.
  • Block two hours for deep work.
  • Keep Friday clear for me.

Wall of Love

Don't just take our word for it.

Our users are our best and most honest ambassadors. See why they wouldn't go back.

Felix Hehn
Felix Hehn Founder, multi-company operator
„With three companies I used to dig through three calendars whenever somebody asked for a meeting. Today I ask once and get an answer that already accounts for all of them."
Louis Hügle
Louis Hügle Self-employed electrician
„I am on job sites all day and rarely near a computer. When a customer calls, I just say the appointment into my phone afterwards and it lands in the right calendar with the address."
Julius Richter
Julius Richter Software developer (employed + freelance)
„I am in the terminal anyway, so that is where I plan now. One sentence and the four hours for the rebuild are in my calendar without me switching windows."
Leonid Schmidt
Leonid Schmidt Marketing manager
„I started by only letting it look things up, because I was sceptical. These days it prepares half my week and I mostly just correct things."
Oliver Hasenzahl
Oliver Hasenzahl Lecturer & manager
„I am honestly not a tech person and did not want anything complicated. I type in when I would like to hold office hours and get three suggestions that actually work."
Luis Otterbeck
Luis Otterbeck Self-employed & agency
„Sending clients meeting options was always the task that got left for later. Now the email comes back written and already checked against the agency and project calendars."

FAQ

Frequently asked questions about Grok

Does this work in the Grok app?

Not at the moment. Kalender Sync is not in the Grok app's plugin directory, so the way in is Grok Build in the terminal.

There you add the server with one command, and Grok uses your calendars like any other tool.

Connect your other agents too

Kalender Sync sits behind an open interface, so whatever else you use reaches the same calendars in the same way. Every agent gets its own access with its own visibility, and you can end each one separately.

Ready for an agent that knows your week?

Connect Grok now

Currently supported providers

GoogleMicrosoftApple iCloudKKSuiteGMXWEB.DEmailbox.orgiCal-Feeds