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Caldav Mcp

dominik1001/caldav-mcp

Connects Claude to any CalDAV server to manage calendar events through standard protocol operations. You get six tools: list calendars, query events by date range, create events with optional recurrence rules, update existing events by UID, and delete events. Supports the usual event fields like summary, description, location, plus recurring events with daily, weekly, monthly, or yearly patterns. Configuration requires your CalDAV server URL and credentials as environment variables. Useful when you want Claude to schedule meetings, check availability, or manage calendar entries directly instead of just generating ics files or giving you commands to run manually.

GitHub stars: 78
tools: 10
auth: Secret needed
transport: STDIO
env vars: 3
last updated: May 27, 2026

Tools

10 tools

Public tool metadata for what this MCP can expose to an agent.

list-calendarsList all calendars returning both name and absolute URL. Pass a calendar's `url` unchanged as `calendarUrl` to the other tools.

List all calendars returning both name and absolute URL. Pass a calendar's `url` unchanged as `calendarUrl` to the other tools.

No parameter schema in public metadata yet.

list-eventsList all events between start and end date in the calendar specified by its URL

List all events between start and end date in the calendar specified by its URL

No parameter schema in public metadata yet.

create-eventCreates an event in the calendar specified by its URL. For all-day events, set `wholeDay` to true. For a single-day all-day event, use `start` and `end` datetimes on the same calendar date; they do not need to be identical timestamps.

Creates an event in the calendar specified by its URL. For all-day events, set `wholeDay` to true. For a single-day all-day event, use `start` and `end` datetimes on the same calendar date; they do not need to be identical timestamps.

No parameter schema in public metadata yet.

update-eventUpdates an existing event in the calendar specified by its URL. Only provided fields are changed. For a one-day full-day event, set `wholeDay` to true and set `start` and `end` to the same calendar day.

Updates an existing event in the calendar specified by its URL. Only provided fields are changed. For a one-day full-day event, set `wholeDay` to true and set `start` and `end` to the same calendar day.

No parameter schema in public metadata yet.

delete-eventDeletes an event in the calendar specified by its URL

Deletes an event in the calendar specified by its URL

No parameter schema in public metadata yet.

list-todosList tasks (VTODOs) in the calendar specified by its URL. By default returns only open tasks (NEEDS-ACTION and IN-PROCESS), sorted by manual order then due date. Use `status` to include completed (`COMPLETED`) or all (`ALL`) tasks, and `limit`/`offset` to page through long lists.

List tasks (VTODOs) in the calendar specified by its URL. By default returns only open tasks (NEEDS-ACTION and IN-PROCESS), sorted by manual order then due date. Use `status` to include completed (`COMPLETED`) or all (`ALL`) tasks, and `limit`/`offset` to page through long lists.

No parameter schema in public metadata yet.

create-todoCreates a task (VTODO) in the calendar specified by its URL. Only `summary` is required; a task may have no dates. Use `due` for a deadline and `start` for when work should begin.

Creates a task (VTODO) in the calendar specified by its URL. Only `summary` is required; a task may have no dates. Use `due` for a deadline and `start` for when work should begin.

No parameter schema in public metadata yet.

update-todoUpdates an existing task (VTODO) in the calendar specified by its URL. Only provided fields are changed. To mark a task done, prefer the `complete-todo` tool.

Updates an existing task (VTODO) in the calendar specified by its URL. Only provided fields are changed. To mark a task done, prefer the `complete-todo` tool.

No parameter schema in public metadata yet.

complete-todoMarks a task (VTODO) as done. Sets its status to COMPLETED and records the completion time.

Marks a task (VTODO) as done. Sets its status to COMPLETED and records the completion time.

No parameter schema in public metadata yet.

delete-todoDeletes a task (VTODO) in the calendar specified by its URL

Deletes a task (VTODO) in the calendar specified by its URL

No parameter schema in public metadata yet.

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Configuration

CALDAV_BASE_URL*

Base URL of the CalDAV server (e.g. https://caldav.example.com)

CALDAV_USERNAME*

Username for CalDAV authentication

CALDAV_PASSWORD*secret

Password for CalDAV authentication

Readme

caldav-mcp

🗓️ A CalDAV Model Context Protocol (MCP) server to expose calendar operations as tools for AI assistants.

✨ Features

Connect to CalDAV servers
List calendars
List calendar events within a specific timeframe
Create calendar events
Update calendar events
Delete calendar events by UID

Setup

View the full README on GitHub

Details

Repository: github.com/dominik1001/caldav-mcp
Category: Productivity & Office
Package: caldav-mcp
Transport: STDIO
Auth: Required
Registry: MCP registry, active

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