Icloud Calendar MCP

iCloud Calendar MCP Server An MCP (Model Context Protocol) server that gives AI assistants access to iCloud Calendar via CalDAV, with security controls aligned with the OWASP MCP Top 10. Its 5 documented tools cluster into read & search, create & write, update, delete. It runs locally over stdio via the published package.

People connecting productivity tools to Claude, Cursor, VS Code, or another MCP client. The project is written in Kotlin.

VERIFIED ACTIVE

LAST COMMIT 2026-08-15 · ★ 14 · #34 OF 139 MAINTAINED PRODUCTIVITY · VERIFIED 2026-08-25

NOASSERTION · Kotlin · how we verify → /methodology

01 · Install Icloud Calendar MCP

before you install - you'll need

Set ICLOUD_USERNAME, ICLOUD_PASSWORD before connecting.

Claude Code

claude mcp add icloud-calendar-mcp-icloud-calendar-mcp -- npx -y @icloud-calendar-mcp/server

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "icloud-calendar-mcp-icloud-calendar-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@icloud-calendar-mcp/server"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license no standard license detected - usage rights unclear; check the repo before commercial use

npm package @icloud-calendar-mcp/server - published under the repo owner's npm scope (@icloud-calendar-mcp)

registry vendor namespace org.onekash - domain-verified with the official MCP registry

03 · What Icloud Calendar MCP can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

What you can build

An agent gets 5 documented tools across read & search, create & write, update, including list_calendars, get_events, create_event, update_event.

Capability map

Tools grouped from the project's README - what Icloud Calendar MCP lets an agent do.

read & search

2 tools - e.g. No parameters required.; Get Events

list_calendars · get_events

create & write

1 tool - e.g. Create Event

create_event

update

1 tool - e.g. Only the fields you pass are changed.

update_event

delete

1 tool - e.g. Delete Event

delete_event

Latest releases

v3.2.0 · 2026-08-14

Bump MCP Kotlin SDK 0.14.0 → 0.15.0 · expand recurrences in get_events instead of the master's DTSTART · re-check CalDAV results against the requested range in get_events · Keep kotlin-logging's startup banner off the…

v3.1.0 · 2026-07-22

return structuredContent from all five tools (MCP -32600) · New Contributors · @JakobsCode made their first contribution in

v3.0.1 · 2026-05-12

04 · Who maintains Icloud Calendar MCP

icloud-calendar-mcp is maintained by icloud-calendar-mcp. It's the only MCP server we track from this author; the repo dates to Jan 2026.

05 · Facts

repository: github.com/icloud-calendar-mcp/icloud-calendar-mcp
category: productivity - ranked #34 of 139 actively-maintained productivity servers as of 2026-08-25.
release cadence: 2 releases in the last 90 days (latest 2026-08-14)
registry: org.onekash/icloud-calendar-mcp (active, first published 2026-03-24 · 5 versions)
packages: npm:@icloud-calendar-mcp/server

06 · Icloud Calendar MCP FAQ

Is Icloud Calendar MCP still maintained?

Yes - as of 2026-08-25, its last commit was 2026-08-15 and it shipped 2 releases in the last 90 days. We re-verify nightly.

What can Icloud Calendar MCP do?

An agent gets 5 documented tools across read & search, create & write, update, including list_calendars, get_events, create_event, update_event.

How do I install Icloud Calendar MCP?

Run `npx -y @icloud-calendar-mcp/server`. The README documents 2 environment variables (ICLOUD_USERNAME, ICLOUD_PASSWORD) to set first. Set ICLOUD_USERNAME, ICLOUD_PASSWORD before connecting. You can also paste the ready-made client config above.

Does Icloud Calendar MCP run locally?

Yes - it's a stdio server: it runs on your machine (via npx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Icloud Calendar MCP

Alternatives to Icloud Calendar MCP

Maintained productivity servers if Icloud Calendar MCP isn't the fit.

Pairs well with

Servers that cover what Icloud Calendar MCP doesn't - only shown when the pairing reason fits the companion.

More productivity MCP servers · Memo · Clear Market · Apple Calendar · Mycal · Obsidian Everywhere