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EU-hosted calendar MCP: Google, Outlook, iCloud, GMX, WEB.DE, CalDAV. Read, book, RSVP, sync.
Kalender Sync is an MCP server entry in ChatHome Skills, sourced from Official MCP Registry and scored 100/100. As a Model Context Protocol server, it exposes tools that MCP-compatible LLM clients such as Claude, Cursor, and Copilot can call directly, extending an agent's reach beyond its built-in capabilities. ChatHome Skills discovered this entry through its daily ingest of official registries and GitHub discovery queries, and re-verifies repository facts, freshness signals, and install metadata on every run. The quality score weighs official-registry presence, a working install command, license clarity, GitHub star trajectory, and repository freshness — the full formula is on the Sources page. The install command above is ready to copy. Review the last-pushed date and repository status before adding Kalender Sync to a production agent workflow; the snapshot facts below are point-in-time values from the most recent ingest.
mcp add de.kalender-sync/kalender-sync https://app.kalender-sync.de/mcpReview the upstream source before running this command.
{
"_meta": {
"io.modelcontextprotocol.registry/official": {
"status": "active",
"isLatest": true,
"updatedAt": "2026-10-18T20:25:42.780215Z",
"publishedAt": "2026-10-18T20:25:42.780215Z",
"statusChangedAt": "2026-10-18T20:25:42.780215Z"
}
},
"server": {
"name": "de.kalender-sync/kalender-sync",
"title": "Kalender Sync",
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
"remotes": [
{
"url": "https://app.kalender-sync.de/mcp",
"type": "streamable-http",
"headers": [
{
"name": "Authorization",
"isSecret": true,
"description": "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 ksa_…'."
}
]
}
],
"version": "1.7.0",
"websiteUrl": "https://kalender-sync.de/en/mcp?ref=mcp_registry",
"description": "EU-hosted calendar MCP: Google, Outlook, iCloud, GMX, WEB.DE, CalDAV. Read, book, RSVP, sync."
}
}