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Connect Grok

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In Grok Build, xAI’s terminal tool, you add Kalender Sync as a remote MCP server.

1. Create the access and key in Kalender Sync

Section titled “1. Create the access and key in Kalender Sync”

No account yet? Create one at app.kalender-sync.de (7 days of Professional free, no credit card) and connect your calendars.

In the app, open AI assistant → Connect the assistant and choose Something else. As with every access, you pick the calendars one by one and set the detail level per calendar — calendars you don’t share don’t exist for Grok.

Create key gives you your access key (a token starting with ksa_). It is shown only once. Treat it like a password: whoever holds the key holds exactly the access you gave this connection. Never paste it into a chat.

2. Add Kalender Sync in Grok Build

Section titled “2. Add Kalender Sync in Grok Build”
  1. Run this command and replace ksa_… with your key:
Terminal window
grok mcp add --transport http kalender-sync https://app.kalender-sync.de/mcp \
  --header "Authorization: Bearer ksa_…"
  1. Check the connection with grok mcp list or grok mcp doctor kalender-sync.

Then dive right in, e.g.: “Which calendars are shared via Kalender Sync?”, “Where do I have two hours in one block this week?” or “When is my dentist appointment?”

Troubleshooting

Section titled “Troubleshooting”
  • 401 / “Unauthorized”: the key is mistyped, expired or revoked. Remove the server with grok mcp remove kalender-sync and add it again with a fresh key.
  • A calendar is missing: add it in the app under AI assistant → Edit sharing — changes apply immediately.

Revoke access

Section titled “Revoke access”

In Kalender Sync under AI assistant, click Revoke on the access — effective immediately; the key is dead regardless of what is stored in Grok. More under Revoke access.