# Connect ChatGPT

:::caution[Advanced — requires Developer mode]
ChatGPT only adds custom MCP servers in **Developer mode**. That's a beta feature flagged "elevated risk" — you're adding connectors OpenAI hasn't verified. For Kalender Sync that's fine (as everywhere, you grant per calendar what the assistant may see), but it's a path for technical users. The simplest route is still [Claude](https://docs.kalender-sync.de/en/ki-assistent/claude/).
:::

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

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

## Video: connecting ChatGPT

The video starts right at the ChatGPT chapter of the tutorial:

<YouTube id="ld2ehRvPpFo" start={206} title="Connect Your AI Assistant to Your Calendar – chapter: ChatGPT" poster="/images/video-posters/ld2ehRvPpFo.jpg" maxWidth="800px" />

## 1. Enable Developer mode

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

![ChatGPT settings: Connectors with the "Developer mode" entry under Advanced](https://docs.kalender-sync.de/images/ki-assistent/01-devmode-open-en.png)

Turn **Developer mode** on and accept the risk notice.

![The Developer mode toggle is enabled](https://docs.kalender-sync.de/images/ki-assistent/02-devmode-on-en.png)

## 2. Add the connector

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

![The Connectors overview in ChatGPT with the plus button](https://docs.kalender-sync.de/images/ki-assistent/03-plugins-en.png)

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](https://docs.kalender-sync.de/images/ki-assistent/04-add-plugin-en.png)

## 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 ("Am I free tomorrow at 2pm?") or have it find events ("When is my dentist appointment?").

## 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](https://docs.kalender-sync.de/en/ki-assistent/#revoke-access).