io.github.lukegskw/caldav-mcp
CalDAV MCP Server
Is the CalDAV MCP server down? No. It answered initialize and tools/list in the probe of 2026-10-31.
A TypeScript MCP server for iCloud Calendar with native multi-VALARM support.
alive probed 2026-11-15 · unchanged since 2026-10-31
- Run it
- npx -y @lukegskw/caldav-mcp@0.2.0 (stdio, probed in a container with the network off)
- Host
- npmjs.com
- Reports itself as
- caldav-mcp 0.2.0
- Capabilities
- tools
- Instructions
- 411 characters
- Of a 1M window
- 0.6 % of a 1M context window
- Count
- 5.6k tokens in Claude Opus 5.5, exact, measured 2026-10-31. With the Claude Code prefix mcp__…__ on each tool name: 5.7k. The o200k_base estimate is 3.3k. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/lukegskw/caldav-mcp
- Registry
- active, updated 2026-10-21 · registry entry
- Changes
- 3 recorded, reachable in 3 of them. A row is added when the result, the tool count or the cost changes.
Most expensive tools
The Claude column scales the o200k estimate of each tool by this server's ratio of exact to estimate, 1.72×.
| Tool | ≈ Claude tokens | o200k estimate | Share of this server |
|---|---|---|---|
| update_event | 1 863 | 1 086 | 33 % |
| create_event | 1 642 | 957 | 29 % |
| list_events | 1 161 | 677 | 21 % |
| delete_event | 396 | 231 | 7 % |
| get_event | 395 | 230 | 7 % |
Compare this server with others.
More servers
Other registry entries on npmjs.com, the ones next to this name; all of them.
- io.github.ludmila-omlopes/youtube-video-analyzer · alive
- io.github.lukabudik/alza-mcp · alive
- io.github.lukasschwarz/elster-mcp-server · alive
- io.github.luke-fairbanks/broll · alive
- BACH CodeCommander io.github.lukisch/bach-codecommander-mcp · alive
- BACH FileCommander io.github.lukisch/bach-filecommander-mcp · alive
- n8n Manager MCP io.github.lukisch/n8n-manager-mcp · alive
- open-compute (computer-use) io.github.lukisch/open-compute-mcp · crashed on start
Servers that mention caldav.
- com.anymailmcp/mail · needs auth
- Kalender Sync de.kalender-sync/kalender-sync · needs auth
- cal-scheduler io.github.limey/cal-scheduler-mcp · alive
- Multi Calendar co.lumman/calendar · needs auth
- io.github.eodozzy/icloud-mcp · crashed on start
- io.github.dominik1001/caldav-mcp · needs env
- CalDAV calendars io.github.ni-c/caldav-mcp · needs env
- Aruba Email & Calendar io.github.jackfioru92/aruba-email · needs mcp<2
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-31 07:35 | alive | 212 ms | 6 | 5.6k | 3.3k |
| 2026-10-24 06:32 | alive | 650 ms | 6 | 3.3k | |
| 2026-10-17 06:17 | alive | 624 ms | 6 | 5.3k | 3.1k |
Badge for the README
The result of the latest probe, the tool count and the token cost. The feed has an entry for every probe that changed them.
A mail when this server changes
Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.
For the publisher
- The server answers initialize and tools/list. Nothing to fix.