Nextcloud Organizer

Name: Nextcloud Organizer
Author: vando-sketch

@vando-sketchMCP server · External

Manage Nextcloud tasks, calendar events and notes from Claude over CalDAV and the Notes API.

Calendarv0.2.1MITPython

Freeno charge per call

How to install

Runs on your machine from its package; the steps are below.

A scripted client creating a task, a recurring event and a time block, then reading the day — From the README · 1 of 4

What it does

Reads
Writes
High impact

At most: creates or changes data: records, files, settings.

What it costs

Free

Odel charges nothing per call. The publisher may charge for its own service.

Runs locally over stdio

This server isn't hosted — your MCP client launches it from a package registry. Use one of the commands below, or drop the config into your client (e.g. Claude Desktop).

PyPInextcloud-organizer-mcpv0.2.1

Run

uvx nextcloud-organizer-mcp

MCP client config

{
  "mcpServers": {
    "nextcloud-organizer": {
      "command": "uvx",
      "args": [
        "nextcloud-organizer-mcp"
      ]
    }
  }
}

README4 min readView on GitHub

nextcloud-organizer-mcp

Let Claude run your Nextcloud tasks, calendar and notes.
A self-hosted MCP server for CalDAV tasks, events and the Notes app.

Python 3.10+

A scripted client creating a task, a recurring event and a time block, then reading the day's agenda
_{Real tool calls against a real Nextcloud ·
watch as video}

Ask in plain language, and your own Nextcloud changes. No copy-paste, no third-party calendar service: the data stays on your server and the tools talk to it over standard CalDAV and the Notes REST API.

Community project, not affiliated with or endorsed by Nextcloud GmbH. Formerly nextcloud-task-mcp.

What you can say

You say	What happens
"Add a high-priority task: finish the Q4 report by Thursday 5pm, remind me 2 hours before."	`create_task` with due date, priority and a `VALARM` reminder
"Add a weekly team sync, Mondays 10:00."	`create_event` with an `RRULE`
"Block Thursday 9-11 for the report."	`create_event_from_task` — a linked time block, task and event stay connected
"What does my Thursday look like?"	`get_agenda` — events (recurring ones expanded) and due tasks in one answer
"Start a note for the Q4 report, then update just the status section."	`create_note`, `update_note_section`

What Claude wrote shows up in the normal Nextcloud apps, immediately:

Nextcloud Tasks showing the high-priority task with its tag and due date

Nextcloud Notes showing the note after a single-section update

Features

Tasks (VTODO): priorities, tags, reminders, subtasks, recurrence with exception dates, four-state status, batch update/delete/move.
Calendars and events (VEVENT): recurring events, attendees and RSVP, free/busy, sharing, ICS import/export, birthdays, batch operations, trash bin.
Timeboxing: turn a task into a calendar block and keep both linked.
Notes: create, search, append, replace a passage or a single Markdown section.
Combined day agenda: events and due tasks together.
Safe by default: OAuth 2.1 with a password consent page, https:// enforced for Nextcloud, clean error messages instead of stack traces.
51 tools in total, documented in the tool reference.

Compatibility

Client	Status
Claude (claude.ai web) as a custom connector	Supported, connector and consent flow tested against claude.ai
Claude mobile and Cowork	Use the same connector as web; not tested separately
Claude Desktop via `mcp-remote`	Documented in the deployment guide
Other MCP clients and model providers	Not tested yet, planned

The server speaks standard Streamable HTTP MCP with OAuth 2.1 (Dynamic Client Registration + PKCE), so other clients may work. The OAuth redirect allow-list defaults to claude.ai and claude.com; other clients need MCP_OAUTH_ALLOWED_REDIRECT_DOMAINS set. Reports from other clients are welcome.

Quick start

Requires Python 3.10+ and a Nextcloud with the Calendar/Tasks and Notes apps.

bash

uv tool install nextcloud-organizer-mcp   # or: pipx install nextcloud-organizer-mcp

Create an app password under Settings → Security → Devices & sessions (never your account password), then set:

bash

export NEXTCLOUD_BASE_URL=https://cloud.example.com
export NEXTCLOUD_USERNAME=your-username
export NEXTCLOUD_APP_PASSWORD=your-app-password
export PUBLIC_BASE_URL=https://your-host.ts.net   # the URL clients use
export MCP_OAUTH_PASSWORD=a-long-random-password  # required unless local

bash

nextcloud-organizer-mcp     # listens on 127.0.0.1:8000, path /mcp

From a checkout instead: uv sync && cp .env.example .env, edit .env, then uv run nextcloud-organizer-mcp. Every setting is documented in .env.example. NEXTCLOUD_BASE_URL must be https:// unless it points at a local address.

Then expose the server (the deployment guide uses Tailscale Funnel for TLS) and add it in Claude under Settings → Connectors → Add custom connector with the URL <PUBLIC_BASE_URL>/mcp. Leave Client ID and Secret blank and enter your MCP_OAUTH_PASSWORD on the consent page that opens. Details: Authentication.

How it works

Claude ── HTTPS + OAuth 2.1 ──► your server (this project) ── CalDAV / Notes API ──► Nextcloud

One CalDAV connection is opened at startup and reused for every request.
No tool or CalDAV logic runs until a request carries a valid access token.
The server binds to a local HTTP port and does not handle TLS itself.
Timestamps use MCP_DEFAULT_TIMEZONE (default Europe/Berlin); naive inputs are interpreted in it.

Documentation

Deployment guide — Ubuntu LXC + Tailscale + systemd + Claude connector setup
Authentication — OAuth model, consent page, local security patches
Tool reference — all tools with parameters, examples and error messages
Architecture — module layout, request flow, design decisions
Contributing — dev setup, checks, branches (main released, dev active)
Changelog · Security policy

License

MIT

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