---

name: synology-calendar description: Manage Synology Calendar events and todos via API. Supports calendars, events, todos, and contacts. Based on official Calendar API Guide (v5).

Synology Calendar API Skill

Overview

Manage Synology Calendar using the official Calendar API.

Documentation: Calendar_API_Guide_enu.pdf

Connection

Environment Variables

export SYNOLOGY_URL="http://{nas_ip}:5000"  # 内网地址
export SYNOLOGY_USER="{username}"
export SYNOLOGY_PASSWORD="your-password"

Quick Start

from client import SynologyCalendar

cal = SynologyCalendar()
cal.login()

# List calendars
calendars = cal.get_calendars()
for c in calendars:
    print(f"{c['cal_id']}: {c['cal_displayname']}")

cal.logout()

---

API Reference

Calendar Operations (SYNO.Cal.Cal)

Method	Description	Status
get_calendars()	List all calendars	✅ Working
get_calendar(cal_id)	Get calendar details	✅ Working
create_calendar(...)	Create calendar	✅ Working
delete_calendar(cal_id)	Delete calendar	✅ Working

Event Operations (SYNO.Cal.Event)

Method	Description	Status
list_events(cal_id_list)	List events	✅ Working
get_event(evt_id)	Get event details	✅ Working
create_event(...)	Create event	✅ Working
delete_event(evt_id)	Delete event	✅ Working

Event Creation Notes:

✅ Working:

• All event types now work correctly with v1 API

⚠️ Critical: SID must be in URL parameter, not JSON body

The Synology Calendar v1 API requires the _sid parameter in the URL query string, not in the JSON body.

create_event Parameters:

Parameter	Type	Required	Example
cal_id	string	✅	/admin/home/
summary	string	✅	Event title
dtstart	int	✅	1770440000
dtend	int	✅	1770443600
is_all_day	bool	✅	false
is_repeat_evt	bool	✅	false
color	string	✅	#D9AE00
description	string	✅	Description
notify_setting	array	✅	[]
participant	array	✅	[]
timezone	string	(if not all-day)	Asia/Shanghai

Example:

# Non-all-day event (working)
cal.create_event(
    cal_id='/{username}/home/',
    summary='Meeting',
    dtstart=now,
    dtend=now + 3600,
    is_all_day=False,
    is_repeat_evt=False,
    description='Team meeting',
    color='#D9AE00',
    timezone='Asia/Shanghai'
)

Todo Operations (SYNO.Cal.Todo)

Method	Description	Status
create_todo(...)	Create task	✅ Working
list_todos(...)	List tasks	✅ Working
get_todo(evt_id)	Get task details	✅ Working
delete_todo(evt_id)	Delete task	✅ Working
complete_todo(evt_id)	Mark complete	✅ Working

Contact Operations (SYNO.Cal.Contact)

Method	Description	Status
list_contacts()	List participants	✅ Working

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CLI Usage

# Login
python client.py login

# List calendars
python client.py list-calendars

# List todos
python client.py list-todos --cal-id "/{username}/home_todo/"

# Create todo
python client.py create-todo \
  --cal-id "/{username}/home_todo/" \
  --title "Task name"

# Complete todo
python client.py complete-todo --evt-id "1012"

---

Known Issues

Event Creation (Fixed with v1 API)

Previous Issue: Event creation returned error 9009 due to:

1. Using v5 API instead of v1 API
2. Missing original_cal_id parameter
3. SID passed in wrong location (JSON body vs URL parameter)

Solution: Use v1 API with:

• cal_id from get_calendars() response
• original_cal_id = cal_id (for non-shared calendars)
• SID in URL parameter: ?_sid=xxx

---

Calendars

ID	Name	Type
/{username}/home/	My Calendar	event
/{username}/home_todo/	Inbox	todo

---

Links

• Official API Guide