io.github.deciduus/calendar-mcp
calendar-mcp
Google Calendar for LLM agents: find, create, update, move, delete events; free/busy; scheduling.
alive probed 2026-10-14
15tools
6.3ktokens in Claude Opus 5.5
6.5ktokens in Claude Code
3.1 %of a 200k context window
3.6ko200k_base estimate
4.3 sto initialize
14 msto list tools
- Run it
- uvx calendar-mcp-server==1.0.1 (stdio, probed in a container with the network off)
- Host
- pypi.org
- Reports itself as
- calendar-mcp 1.0.1
- Capabilities
- prompts, resources, tools
- Instructions
- 1 394 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-14. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/deciduus/calendar-mcp
- Registry
- active, updated 2026-09-05 · registry entry
- Reachable
- 1 of the last 1 probe
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| schedule_mutual | 524 | 14 % |
| create_event | 387 | 11 % |
| update_event | 342 | 9 % |
| move_event | 326 | 9 % |
| find_events | 290 | 8 % |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.deciduus/calendar-mcp)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.