Kalender Sync

MCP server · by de

Communication Streamable HTTP v1.7.0

EU-hosted calendar MCP: Google, Outlook, iCloud, GMX, WEB.DE, CalDAV. Read, book, RSVP, sync.

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Install

Pin version unavailable — hosted endpoints aren’t versioned

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

Setup by client

Pick your client — the config below is generated for this server (hosted endpoint). Copy respects the “Pin version” switch above.

Remote (hosted) endpoint

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

Claude Desktop: Settings → Connectors → Add custom connector, paste this URL, and provide: Authorization.

Format verified against the official Claude Desktop docs ↗.

terminal

claude mcp add --transport http kalender-sync https://app.kalender-sync.de/mcp --header "Authorization: Bearer <YOUR_AUTHORIZATION>"

Format verified against the official Claude Code docs ↗.

.cursor/mcp.json (hosted endpoint)

{
  "mcpServers": {
    "kalender-sync": {
      "url": "https://app.kalender-sync.de/mcp",
      "headers": {
        "Authorization": "<YOUR_AUTHORIZATION>"
      }
    }
  }
}

Format verified against the official Cursor docs ↗.

.vscode/mcp.json (hosted endpoint)

{
  "servers": {
    "kalender-sync": {
      "type": "http",
      "url": "https://app.kalender-sync.de/mcp",
      "headers": {
        "Authorization": "<YOUR_AUTHORIZATION>"
      }
    }
  }
}

Format verified against the official VS Code docs ↗.

mcp_config.json (hosted endpoint)

{
  "mcpServers": {
    "kalender-sync": {
      "serverUrl": "https://app.kalender-sync.de/mcp",
      "headers": {
        "Authorization": "<YOUR_AUTHORIZATION>"
      }
    }
  }
}

Format verified against the official Windsurf docs ↗.

Environment variables

Defined in the server's official registry manifest. Required secrets are shown as <YOUR_…> placeholders in the configs above.

Authorization secret header — Not needed for Claude and ChatGPT, which sign in via OAuth. All other clients: create an access key in the Kalender Sync app under AI assistant → Connect assistant → Something else → Create key, and send it as 'Bearer ks

About this server

Distributed as Streamable HTTP, listed under Communication. Review our MCP security guide before granting access to real data.

Frequently asked questions

How do I install Kalender Sync?

Run the install command shown above, then paste the config for your client (Claude Desktop, Claude Code, Cursor, VS Code or Windsurf) into its MCP settings and restart the client.

Is Kalender Sync free to use?

The MCP server itself is free to install. Any third-party service it calls may require its own API key and account.

Which clients support Kalender Sync?

Any MCP-compatible client can use it, including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf and custom agents.

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