Caldav MCP

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by dominik1001

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

Install

$npx tsc

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Tools (32)

byday

array of string (optional)

bymonth

array of number (optional)

bymonthday

array of number (optional)

calendarUrl

string

complete-todo

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

count

number (optional)

create-event

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.

create-todo

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.

delete-event

Deletes an event in the calendar specified by its URL

delete-todo

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

description

string (optional)

due

string (optional) — Due datetime (ISO 8601)

due_after

string (optional) — Only tasks with a due date at or after this (ISO 8601). Undated tasks are excluded when a due window is set.

due_before

string (optional) — Only tasks with a due date at or before this (ISO 8601). Undated tasks are excluded when a due window is set.

end

string — End date (ISO 8601)

freq

enum (DAILY WEEKLY MONTHLY YEARLY) (optional)

interval

number (optional)

limit

number (optional) — Max tasks to return (default 50, max 500)

list-calendars

List all calendars returning both name and URL

list-events

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

list-todos

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.

location

string (optional)

offset

number (optional) — Tasks to skip (default 0)

recurrenceRule

object (optional)

start

string — Start date (ISO 8601)

status

enum (OPEN ALL NEEDS-ACTION COMPLETED IN-PROCESS CANCELLED) (optional) — Filter by status. OPEN (default) = NEEDS-ACTION + IN-PROCESS; ALL = everything; or an exact status (NEEDS-ACTION, COMPLETED, IN-PROCESS, CANCELLED).

summary

string

uid

string — Unique identifier of the event to update (obtained from list-events)

until

string (optional)

update-event

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.

update-todo

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.

wholeDay

boolean (optional) — Create as a whole-day event