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Connect ChatGPT

The address (MCP server URL) you’ll enter below is:

https://app.kalender-sync.de/mcp

1. Enable Developer mode

Section titled “1. Enable Developer mode”

In ChatGPT open Settings → Connectors, then Advanced and Developer mode.

ChatGPT settings: Connectors with the "Developer mode" entry under Advanced

Turn Developer mode on and accept the risk notice.

The Developer mode toggle is enabled

2. Add the connector

Section titled “2. Add the connector”

Go to the Connectors page and click + at the top right.

The Connectors overview in ChatGPT with the plus button

In the “New connector” dialog:

  • Name: e.g. Kalender Sync
  • Connection: leave Server URL selected, enter the address copied above
  • Authentication: OAuth
  • Accept the risk notice and add it.

The "New connector" dialog with Server URL and OAuth

3. Grant access

Section titled “3. Grant access”

ChatGPT sends you to our consent screen. Sign in, pick the calendars and the detail level per calendar — only with this confirmation does the access exist.

Afterwards you can ask about your availability in a chat, e.g. “Am I free tomorrow at 2pm?”.

Disconnect again

Section titled “Disconnect again”

Removing the connector in ChatGPT only disconnects it there. The authoritative revoke is the one in Kalender Sync under AI assistant → Revoke → Revoke access.