ChatGPT
Connect ChatGPT to all of your calendars
Kalender Sync connects ChatGPT to all of your calendars: Outlook, Google, Apple, GMX, WEB.DE and more. With one connector you can let your agent handle your calendars from now on. Create events, check availability, plan your day, all through a single interface.
Reaches these calendars
Turn on developer mode
Open the settings in ChatGPT and switch on developer mode at the bottom of the plugins section. Right now that is the only way ChatGPT lets in third-party connections.
Add Kalender Sync
Create a new plugin, give it a name and enter our server address. Pick OAuth as the sign-in method and the browser login takes care of the rest.
https://app.kalender-sync.de/mcp Grant your calendars
ChatGPT sends you over to us. There you choose which calendars are visible and how much of them, and from then on ChatGPT answers from your real calendar. That puts you in with more than 1,000 people who no longer hunt for free slots themselves.
Every calendar on one connection
ChatGPT can connect to one account; we hand it your entire schedule. Outlook, Google, Apple, GMX, WEB.DE, mailbox.org, kSuite and Posteo come together in Kalender Sync. OpenAI never sees your credentials for those accounts: they stay with us, and you can withdraw access in one place.
From chat to assistant
Without your calendar ChatGPT answers in general terms. With it, it suggests times that are genuinely free, writes the email to your client and books the event when you want it to.
You decide what ChatGPT sees
For each calendar you choose between busy, title with time, and full details. What you don't grant doesn't exist for ChatGPT, and attendees or attachments never leave your calendar.
And you decide what it may do
Whether it only looks or also creates events is your call, per calendar. Every action is logged with a timestamp so nothing happens unnoticed, and you can end the connection with one click. Hosted in Germany.
Tutorial
This is how you connect ChatGPT.
The video walks the whole way: turn on developer mode, add Kalender Sync and grant your calendars at the level of detail you want.
Read the guide
Clicking play loads YouTube. Data will be sent to Google.
Examples
What you can ask ChatGPT
It stays an ordinary conversation. The difference is that ChatGPT can now look into the calendars you granted instead of guessing.
See the day
You ask once and get a summary across every account. No more switching between Outlook, Google and the private calendar.
- What is still on today?
- What does my week look like?
- Anything important on Friday?
Find free time
Asking for a free window saves the most time. ChatGPT checks every connected calendar at once and only suggests times that are genuinely free.
- Where do I have two hours in one piece this week?
- When does a meeting with Lisa fit?
- Offer three times for a first call.
Create events
If you allow creating for a calendar, ChatGPT doesn't just write the suggestion, it books the event in the right calendar as well.
- Put the call on Tuesday at 10.
- Block 7 to 8 in the morning for the gym.
- Add the dentist on the 3rd at 9.
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.
FAQ
Frequently asked questions about ChatGPT
What is ChatGPT allowed to do in my calendar?
Only what you allow, and separately per calendar. The switch for creating events starts off, and plenty of people let ChatGPT look first.
Every query and every event is logged with a timestamp in the app. If something looks odd, you end the connection there with one click.
What the assistant may doWhy do I need developer mode for this?
Because right now that is the only place ChatGPT allows third-party connections. The warning OpenAI shows applies to every self-added connection and says nothing about us.
It changes nothing about your control: what becomes visible and what is allowed is decided afterwards on our side. As soon as OpenAI allows connectors outside developer mode, the same connection works without this step.
Read it step by stepI can't find developer mode.
It sits at the bottom of the plugins section in settings. If it isn't there, your ChatGPT plan doesn't support it yet, which depends on the rollout rather than on your account with us.
In that case the same calendar access works straight away through another agent. The grant is the same, so nothing has to be set up twice.
All supported agentsDoes OpenAI get my calendar credentials?
No. The only thing connected is Kalender Sync. Your logins for Google, Microsoft or Apple stay with us and are never passed on.
ChatGPT only ever sees the event data you granted, at the level of detail you chose. That is the difference to giving every assistant its own access to every account.
The three visibility levelsHow far ahead can ChatGPT plan?
For availability it queries stretches of up to 92 days at a time and can look back up to a year.
When searching for a keyword it gets the 50 nearest hits plus a note when there were more, so it knows when a list is incomplete instead of treating half an answer as the whole one.
And what does it cost?
From 5 euros a month. What you need depends mostly on how many calendars you want to connect: the Basic plan covers three accounts, Professional as many as you like.
The assistant itself costs nothing extra, it is part of every plan. You can try the whole thing for seven days, without a credit card and without anything renewing on its own.
See the plansConnect 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 a ChatGPT that knows your schedule?
Connect ChatGPT nowCurrently supported providers
GoogleMicrosoftApple iCloudKSuiteGMXWEB.DEmailbox.orgiCal-Feeds