Apple Events MCP Server

English | 简体中文

A Model Context Protocol (MCP) server that provides native integration with Apple Reminders and Calendar on macOS. This server allows you to interact with Apple Reminders and Calendar Events through a standardized interface with comprehensive management capabilities.

Features

Core Functionality

List Management: View all reminders and reminder lists with advanced filtering options
Reminder Operations: Full CRUD operations (Create, Read, Update, Delete) for reminders across lists
Rich Content Support: Complete support for titles, notes, due dates, URLs, and completion status
Native macOS Integration: Direct integration with Apple Reminders using EventKit framework

Advanced Features

Smart Organization: Automatic categorization and intelligent filtering by priority, due date, category, or completion status
Powerful Search: Multi-criteria filtering including completion status, due date ranges, and full-text search
Batch Operations: Efficient handling of multiple reminders with optimized data access patterns
Permission Management: Automatic validation and request for required macOS system permissions
Flexible Date Handling: Support for multiple date formats (YYYY-MM-DD, ISO 8601) with timezone awareness
Unicode Support: Full international character support with comprehensive input validation

Technical Excellence

Clean Architecture: 4-layer architecture following Clean Architecture principles with dependency injection
Type Safety: Complete TypeScript coverage with Zod schema validation for runtime type checking
High Performance: Swift-compiled binaries for performance-critical Apple Reminders operations
Robust Error Handling: Consistent error responses with detailed diagnostic information
Repository Pattern: Data access abstraction with standardized CRUD operations
Functional Programming: Pure functions with immutable data structures where appropriate

Prerequisites

Node.js 18 or later
macOS (required for Apple Reminders integration)
Xcode Command Line Tools (required for compiling Swift code)
pnpm (recommended for package management)

macOS Permission Requirements (Sonoma 14+ / Sequoia 15)

Apple now separates Reminders and Calendar permissions into write-only and full-access scopes. The Swift bridge declares the following privacy keys so Claude can both read and write data when you approve access:

NSRemindersUsageDescription
NSRemindersFullAccessUsageDescription
NSRemindersWriteOnlyAccessUsageDescription
NSCalendarsUsageDescription
NSCalendarsFullAccessUsageDescription
NSCalendarsWriteOnlyAccessUsageDescription

When the CLI detects a notDetermined authorization status it calls requestFullAccessToReminders / requestFullAccessToEvents, which in turn triggers macOS to show the correct prompt. If the OS ever loses track of permissions, rerun ./check-permissions.sh to re-open the dialogs.

If a Claude tool call still encounters a permission failure, the Node.js layer automatically runs a minimal AppleScript (osascript -e 'tell application "Reminders" …') to surface the dialog and then retries the Swift CLI once.

Verification command

pnpm test -- src/swift/Info.plist.test.ts

The test suite ensures all required usage-description strings are present before shipping the binary.

Quick Start

Install globally via npm:

npm install -g mcp-server-apple-events

Configuration

Configure Cursor

Open Cursor
Open Cursor settings
Click on "MCP" in the sidebar
Click "Add new global MCP server"

Configure the server with the following settings:

{
  "mcpServers": {
    "apple-reminders": {
      "command": "mcp-server-apple-events",
      "args": []
    }
  }
}

Configure ChatWise

Open ChatWise
Go to Settings
Navigate to the Tools section
Click the "+" button
Configure the tool with the following settings:
- Type: stdio
- ID: apple-reminders
- Command: mcp-server-apple-events
- Args: (leave empty)

Configure Claude Desktop

You need to configure Claude Desktop to recognize the Apple Events MCP server. There are two ways to access the configuration:

Option 1: Through Claude Desktop UI

Open Claude Desktop app
Enable Developer Mode from the top-left menu bar
Open Settings and navigate to the Developer Option
Click the Edit Config button to open claude_desktop_config.json

Option 2: Direct File Access

For macOS:

code ~/Library/Application\ Support/Claude/claude_desktop_config.json

For Windows:

code %APPDATA%\Claude\claude_desktop_config.json

2. Add Server Configuration

Add the following configuration to your claude_desktop_config.json:

{
  "mcpServers": {
    "apple-reminders": {
      "command": "mcp-server-apple-events",
      "args": []
    }
  }
}

3. Restart Claude Desktop

For the changes to take effect:

Completely quit Claude Desktop (not just close the window)
Start Claude Desktop again
Look for the tool icon to verify the Apple Events server is connected

Usage Examples

Once configured, you can ask Claude to interact with your Apple Reminders. Here are some example prompts:

Creating Reminders

Create a reminder to "Buy groceries" for tomorrow at 5 PM.
Add a reminder to "Call mom" with a note "Ask about weekend plans".
Create a reminder in my "Work" list to "Submit report" due next Friday.
Create a reminder with URL "Check this website: https://google.com".

Update Reminders

Update the reminder "Buy groceries" with a new title "Buy organic groceries".
Update "Call mom" reminder to be due today at 6 PM.
Update the reminder "Submit report" and mark it as completed.
Change the notes on "Buy groceries" to "Don't forget milk and eggs".

Managing Reminders

Show me all my reminders.
List all reminders in my "Shopping" list.
Show my completed reminders.

Working with Lists

Show all my reminder lists.
Show reminders from my "Work" list.

The server will:

Process your natural language requests
Interact with Apple's native Reminders app
Return formatted results to Claude
Maintain native integration with macOS

Structured Prompt Library

The server ships with a consolidated prompt registry exposed via the MCP ListPrompts and GetPrompt endpoints. Each template shares a mission, context inputs, numbered process, constraints, output format, and quality bar so downstream assistants receive predictable scaffolding instead of brittle free-form examples.

daily-task-organizer — optional today_focus (what you most want to accomplish today) input produces a same-day execution blueprint that keeps priority work balanced with recovery time. Supports intelligent task clustering, focus block scheduling, automatic reminder list organization, and auto-creates calendar time blocks when many due-today reminders need fixed slots. Quick Win clusters become 15-minute “Focus Sprint — [Outcome]” holds that finish at each reminder’s due timestamp, while Standard tasks map to 30-, 45-, or 60-minute events anchored to the same due-time window.
smart-reminder-creator — optional task_idea (a short description of what you want to do) generates an optimally scheduled reminder structure.
reminder-review-assistant — optional review_focus (e.g., overdue or a list name) to audit and optimize existing reminders.
weekly-planning-workflow — optional user_ideas (your thoughts and ideas for what you want to accomplish this week) guides a Monday-through-Sunday reset with time blocks tied to existing lists.

Design constraints and validation

Prompts are intentionally constrained to native Apple Reminders capabilities (no third-party automations) and ask for missing context before committing to irreversible actions.
Shared formatting keeps outputs renderable as Markdown sections or tables without extra parsing glue in client applications.
Run pnpm test -- src/server/prompts.test.ts to assert metadata, schema compatibility, and narrative assembly each time you amend prompt copy.

Available MCP Tools

This server now exposes service-scoped MCP tools that mirror Apple Reminders and Calendar domains. Use the identifier that matches the resource you want to manipulate:

Reminder Tasks Tool

Tool Name: reminders_tasks

Manages individual reminder tasks with full CRUD support.

Actions: read, create, update, delete

Main Handler Functions:

handleReadReminders() - Read reminders with filtering options
handleCreateReminder() - Create new reminders
handleUpdateReminder() - Update existing reminders
handleDeleteReminder() - Delete reminders

Parameters by Action

Read Action (action: "read"):

id (optional): Unique identifier of a specific reminder to read
filterList (optional): Name of the reminder list to show
showCompleted (optional): Include completed reminders (default: false)
search (optional): Search term to filter reminders by title or content
dueWithin (optional): Filter by due date range ("today", "tomorrow", "this-week", "overdue", "no-date")

Create Action (action: "create"):

title (required): Title of the reminder
dueDate (optional): Due date in format 'YYYY-MM-DD' or 'YYYY-MM-DD HH:mm:ss'
targetList (optional): Name of the reminders list to add to
note (optional): Note text to attach to the reminder
url (optional): URL to associate with the reminder

Update Action (action: "update"):

id (required): Unique identifier of the reminder to update
title (optional): New title for the reminder
dueDate (optional): New due date in format 'YYYY-MM-DD' or 'YYYY-MM-DD HH:mm:ss'
note (optional): New note text
url (optional): New URL to attach to the reminder
completed (optional): Mark reminder as completed/uncompleted
targetList (optional): Name of the list containing the reminder

Delete Action (action: "delete"):

id (required): Unique identifier of the reminder to delete

Example Usage

{
  "action": "create",
  "title": "Buy groceries",
  "dueDate": "2024-03-25 18:00:00",
  "targetList": "Shopping",
  "note": "Don't forget milk and eggs",
  "url": "https://example.com/shopping-list"
}

{
  "action": "read",
  "filterList": "Work",
  "showCompleted": false,
  "dueWithin": "today"
}

{
  "action": "delete",
  "id": "reminder-123"
}

Reminder Lists Tool

Tool Name: reminders_lists

Manages reminder lists - view existing lists or create new ones for organizing reminders.

Actions: read, create, update, delete

Main Handler Functions:

handleReadReminderLists() - Read all reminder lists
handleCreateReminderList() - Create new reminder lists
handleUpdateReminderList() - Update existing reminder lists
handleDeleteReminderList() - Delete reminder lists

Parameters by Action

Read Action (action: "read"):

No additional parameters required

Create Action (action: "create"):

name (required): Name for new reminder list

Update Action (action: "update"):

name (required): Current name of the list to update
newName (required): New name for the reminder list

Delete Action (action: "delete"):

name (required): Name of the list to delete

Example Usage

{
  "action": "create",
  "name": "Project Alpha"
}

Calendar Events Tool

Tool Name: calendar_events

Handles EventKit calendar events (time blocks) with CRUD capabilities.

Actions: read, create, update, delete

Main Handler Functions:

handleReadCalendarEvents() - Read events with optional filters
handleCreateCalendarEvent() - Create calendar events
handleUpdateCalendarEvent() - Update existing events
handleDeleteCalendarEvent() - Delete calendar events

Parameters by Action

Read Action (action: "read"):

id (optional): Unique identifier of an event to read
filterCalendar (optional): Calendar name filter
search (optional): Keyword match against title, notes, or location
startDate (optional): Filter events starting on/after this date
endDate (optional): Filter events ending on/before this date

Create Action (action: "create"):

title (required): Event title
startDate (required): Start date/time
endDate (required): End date/time
targetCalendar (optional): Calendar name to create in
note, location, url, isAllDay (optional): Additional metadata

Update Action (action: "update"):

id (required): Event identifier
Other fields align with create parameters and are optional updates

Delete Action (action: "delete"):

id (required): Event identifier to remove

Calendar Collections Tool

Tool Name: calendar_calendars

Returns the available calendars from EventKit. This is useful before creating or updating events to confirm calendar identifiers.

Actions: read

Main Handler Function:

handleReadCalendars() - List all calendars with IDs and titles

Example Usage

{
  "action": "read"
}

Example Response

{
  "content": [
    {
      "type": "text",
      "text": "### Calendars (Total: 3)\n- Work (ID: cal-1)\n- Personal (ID: cal-2)\n- Shared (ID: cal-3)"
    }
  ],
  "isError": false
}

Response Formats

Success Response:

{
  "content": [
    {
      "type": "text",
      "text": "Successfully created reminder: Buy groceries"
    }
  ],
  "isError": false
}

Note about URL fields: The url field is fully supported by EventKit API. When you create or update a reminder with a URL parameter, the URL is stored in two places for maximum compatibility:

EventKit URL field: The URL is stored in the native url property (visible in Reminders app detail view via the "i" icon)
Notes field: The URL is also appended to the notes using a structured format for parsing

Dual Storage Approach:

URL field: Stores a single URL for native Reminders app display
Notes field: Stores URLs in a structured format for parsing and multiple URL support

Reminder note content here...

URLs:
- https://example.com
- https://another-url.com

This ensures URLs are accessible both in the Reminders app UI and through the API/notes for parsing.

URL Extraction: You can extract URLs from reminder notes using regex:

// Extract URLs from notes using regex
const urlsRegex = reminder.notes?.match(/https?:\/\/[^\s]+/g) || [];

Benefits of Structured Format:

Consistent parsing: URLs are always in a predictable location
Multiple URL support: Handle multiple URLs per reminder reliably
Clean separation: Note content and URLs are clearly separated
Backward compatible: Unstructured URLs still detected as fallback

List Response:

{
  "reminders": [
    {
      "title": "Buy groceries", 
      "list": "Shopping",
      "isCompleted": false,
      "dueDate": "2024-03-25 18:00:00",
      "notes": "Don't forget milk\n\nURLs:\n- https://grocery-store.com\n- https://shopping-list.com",
      "url": null
    }
  ],
  "total": 1,
  "filter": {
    "list": "Shopping",
    "showCompleted": false
  }
}

Organization Strategies

The server provides intelligent reminder organization capabilities through four built-in strategies:

Priority Strategy

Automatically categorizes reminders based on priority keywords:

High Priority: Contains words like "urgent", "important", "critical", "asap"
Medium Priority: Default category for standard reminders
Low Priority: Contains words like "later", "someday", "eventually", "maybe"

Due Date Strategy

Organizes reminders based on their due dates:

Overdue: Past due dates
Today: Due today
Tomorrow: Due tomorrow
This Week: Due within the current week
Next Week: Due next week
Future: Due beyond next week
No Date: Reminders without due dates

Category Strategy

Intelligently categorizes reminders by content analysis:

Work: Business, meetings, projects, office, client related
Personal: Home, family, friends, self-care related
Shopping: Buy, store, purchase, groceries related
Health: Doctor, exercise, medical, fitness, workout related
Finance: Bills, payments, bank, budget related
Travel: Trips, flights, hotels, vacation related
Education: Study, learn, courses, books, research related
Uncategorized: Doesn't match any specific category

Completion Status Strategy

Simple binary organization:

Active: Incomplete reminders
Completed: Finished reminders

Usage Examples

Organize all reminders by priority:

Organize my reminders by priority

Categorize work-related reminders:

Organize reminders from Work list by category

Sort overdue items:

Organize overdue reminders by due date

License

MIT

Contributing

Contributions welcome! Please read the contributing guidelines first.

Development

Install dependencies with pnpm (keeps the Swift bridge and TypeScript graph in sync):

pnpm install

Build the project (TypeScript and Swift binary) before invoking the CLI:

pnpm build

Run the full test suite to validate TypeScript, Swift bridge shims, and prompt templates:

pnpm test

Lint and format with Biome prior to committing:

pnpm exec biome check

Launching from nested directories

The CLI entry point includes a project-root fallback, so you can start the server from nested paths (for example dist/ or editor task runners) without losing access to the bundled Swift binary. The bootstrapper walks up to ten directories to find package.json; if you customise the folder layout, keep the manifest reachable within that depth to retain the guarantee.

Available Scripts

pnpm build - Build the Swift helper binary (required before starting the server)
pnpm build:swift - Build the Swift helper binary only
pnpm dev - TypeScript development mode with file watching via tsx (runtime TS execution)
pnpm start - Start the MCP server over stdio (auto-fallback to runtime TS if no build)
pnpm test - Run the comprehensive Jest test suite
pnpm check - Run Biome formatting and TypeScript type checking

Dependencies

Runtime Dependencies:

@modelcontextprotocol/sdk ^1.20.2 - MCP protocol implementation
moment ^2.30.1 - Date/time handling utilities
exit-on-epipe ^1.0.1 - Graceful process termination handling
tsx ^4.20.6 - TypeScript execution and REPL
zod ^4.1.12 - Runtime type validation

Development Dependencies:

typescript ^5.9.3 - TypeScript compiler
@types/node ^24.9.2 - Node.js type definitions
@types/jest ^30.0.0 - Jest type definitions
jest ^30.2.0 - Testing framework
babel-jest ^30.2.0 - Babel Jest transformer
babel-plugin-transform-import-meta ^2.3.3 - Babel import meta transform
ts-jest ^29.4.5 - Jest TypeScript support
@biomejs/biome ^2.3.2 - Code formatting and linting

Build Tools:

Swift binaries for native macOS integration
TypeScript compilation for cross-platform compatibility

Apple Events MCP Server

English | 简体中文

Features

Core Functionality

List Management: View all reminders and reminder lists with advanced filtering options
Reminder Operations: Full CRUD operations (Create, Read, Update, Delete) for reminders across lists
Rich Content Support: Complete support for titles, notes, due dates, URLs, and completion status
Native macOS Integration: Direct integration with Apple Reminders using EventKit framework

Advanced Features

Smart Organization: Automatic categorization and intelligent filtering by priority, due date, category, or completion status
Powerful Search: Multi-criteria filtering including completion status, due date ranges, and full-text search
Batch Operations: Efficient handling of multiple reminders with optimized data access patterns
Permission Management: Automatic validation and request for required macOS system permissions
Flexible Date Handling: Support for multiple date formats (YYYY-MM-DD, ISO 8601) with timezone awareness
Unicode Support: Full international character support with comprehensive input validation

Technical Excellence

Clean Architecture: 4-layer architecture following Clean Architecture principles with dependency injection
Type Safety: Complete TypeScript coverage with Zod schema validation for runtime type checking
High Performance: Swift-compiled binaries for performance-critical Apple Reminders operations
Robust Error Handling: Consistent error responses with detailed diagnostic information
Repository Pattern: Data access abstraction with standardized CRUD operations
Functional Programming: Pure functions with immutable data structures where appropriate

Prerequisites

Node.js 18 or later
macOS (required for Apple Reminders integration)
Xcode Command Line Tools (required for compiling Swift code)
pnpm (recommended for package management)

macOS Permission Requirements (Sonoma 14+ / Sequoia 15)

NSRemindersUsageDescription
NSRemindersFullAccessUsageDescription
NSRemindersWriteOnlyAccessUsageDescription
NSCalendarsUsageDescription
NSCalendarsFullAccessUsageDescription
NSCalendarsWriteOnlyAccessUsageDescription

Verification command

pnpm test -- src/swift/Info.plist.test.ts

The test suite ensures all required usage-description strings are present before shipping the binary.

Quick Start

Install globally via npm:

npm install -g mcp-server-apple-events

Configuration

Configure Cursor

Open Cursor
Open Cursor settings
Click on "MCP" in the sidebar
Click "Add new global MCP server"

Configure the server with the following settings:

{
  "mcpServers": {
    "apple-reminders": {
      "command": "mcp-server-apple-events",
      "args": []
    }
  }
}

Configure ChatWise

Open ChatWise
Go to Settings
Navigate to the Tools section
Click the "+" button
Configure the tool with the following settings:
- Type: stdio
- ID: apple-reminders
- Command: mcp-server-apple-events
- Args: (leave empty)

Configure Claude Desktop

You need to configure Claude Desktop to recognize the Apple Events MCP server. There are two ways to access the configuration:

Option 1: Through Claude Desktop UI

Open Claude Desktop app
Enable Developer Mode from the top-left menu bar
Open Settings and navigate to the Developer Option
Click the Edit Config button to open claude_desktop_config.json

Option 2: Direct File Access

For macOS:

code ~/Library/Application\ Support/Claude/claude_desktop_config.json

For Windows:

code %APPDATA%\Claude\claude_desktop_config.json

2. Add Server Configuration

Add the following configuration to your claude_desktop_config.json:

{
  "mcpServers": {
    "apple-reminders": {
      "command": "mcp-server-apple-events",
      "args": []
    }
  }
}

3. Restart Claude Desktop

For the changes to take effect:

Completely quit Claude Desktop (not just close the window)
Start Claude Desktop again
Look for the tool icon to verify the Apple Events server is connected

Usage Examples

Once configured, you can ask Claude to interact with your Apple Reminders. Here are some example prompts:

Creating Reminders

Create a reminder to "Buy groceries" for tomorrow at 5 PM.
Add a reminder to "Call mom" with a note "Ask about weekend plans".
Create a reminder in my "Work" list to "Submit report" due next Friday.
Create a reminder with URL "Check this website: https://google.com".

Update Reminders

Update the reminder "Buy groceries" with a new title "Buy organic groceries".
Update "Call mom" reminder to be due today at 6 PM.
Update the reminder "Submit report" and mark it as completed.
Change the notes on "Buy groceries" to "Don't forget milk and eggs".

Managing Reminders

Show me all my reminders.
List all reminders in my "Shopping" list.
Show my completed reminders.

Working with Lists

Show all my reminder lists.
Show reminders from my "Work" list.

The server will:

Process your natural language requests
Interact with Apple's native Reminders app
Return formatted results to Claude
Maintain native integration with macOS

Structured Prompt Library

daily-task-organizer — optional today_focus (what you most want to accomplish today) input produces a same-day execution blueprint that keeps priority work balanced with recovery time. Supports intelligent task clustering, focus block scheduling, automatic reminder list organization, and auto-creates calendar time blocks when many due-today reminders need fixed slots. Quick Win clusters become 15-minute “Focus Sprint — [Outcome]” holds that finish at each reminder’s due timestamp, while Standard tasks map to 30-, 45-, or 60-minute events anchored to the same due-time window.
smart-reminder-creator — optional task_idea (a short description of what you want to do) generates an optimally scheduled reminder structure.
reminder-review-assistant — optional review_focus (e.g., overdue or a list name) to audit and optimize existing reminders.
weekly-planning-workflow — optional user_ideas (your thoughts and ideas for what you want to accomplish this week) guides a Monday-through-Sunday reset with time blocks tied to existing lists.

Design constraints and validation

Prompts are intentionally constrained to native Apple Reminders capabilities (no third-party automations) and ask for missing context before committing to irreversible actions.
Shared formatting keeps outputs renderable as Markdown sections or tables without extra parsing glue in client applications.
Run pnpm test -- src/server/prompts.test.ts to assert metadata, schema compatibility, and narrative assembly each time you amend prompt copy.

Available MCP Tools

This server now exposes service-scoped MCP tools that mirror Apple Reminders and Calendar domains. Use the identifier that matches the resource you want to manipulate:

Reminder Tasks Tool

Tool Name: reminders_tasks

Manages individual reminder tasks with full CRUD support.

Actions: read, create, update, delete

Main Handler Functions:

handleReadReminders() - Read reminders with filtering options
handleCreateReminder() - Create new reminders
handleUpdateReminder() - Update existing reminders
handleDeleteReminder() - Delete reminders

Parameters by Action

Read Action (action: "read"):

id (optional): Unique identifier of a specific reminder to read
filterList (optional): Name of the reminder list to show
showCompleted (optional): Include completed reminders (default: false)
search (optional): Search term to filter reminders by title or content
dueWithin (optional): Filter by due date range ("today", "tomorrow", "this-week", "overdue", "no-date")

Create Action (action: "create"):

title (required): Title of the reminder
dueDate (optional): Due date in format 'YYYY-MM-DD' or 'YYYY-MM-DD HH:mm:ss'
targetList (optional): Name of the reminders list to add to
note (optional): Note text to attach to the reminder
url (optional): URL to associate with the reminder

Update Action (action: "update"):

id (required): Unique identifier of the reminder to update
title (optional): New title for the reminder
dueDate (optional): New due date in format 'YYYY-MM-DD' or 'YYYY-MM-DD HH:mm:ss'
note (optional): New note text
url (optional): New URL to attach to the reminder
completed (optional): Mark reminder as completed/uncompleted
targetList (optional): Name of the list containing the reminder

Delete Action (action: "delete"):

id (required): Unique identifier of the reminder to delete

Example Usage

{
  "action": "create",
  "title": "Buy groceries",
  "dueDate": "2024-03-25 18:00:00",
  "targetList": "Shopping",
  "note": "Don't forget milk and eggs",
  "url": "https://example.com/shopping-list"
}

{
  "action": "read",
  "filterList": "Work",
  "showCompleted": false,
  "dueWithin": "today"
}

{
  "action": "delete",
  "id": "reminder-123"
}

Reminder Lists Tool

Tool Name: reminders_lists

Manages reminder lists - view existing lists or create new ones for organizing reminders.

Actions: read, create, update, delete

Main Handler Functions:

handleReadReminderLists() - Read all reminder lists
handleCreateReminderList() - Create new reminder lists
handleUpdateReminderList() - Update existing reminder lists
handleDeleteReminderList() - Delete reminder lists

Parameters by Action

Read Action (action: "read"):

No additional parameters required

Create Action (action: "create"):

name (required): Name for new reminder list

Update Action (action: "update"):

name (required): Current name of the list to update
newName (required): New name for the reminder list

Delete Action (action: "delete"):

name (required): Name of the list to delete

Example Usage

{
  "action": "create",
  "name": "Project Alpha"
}

Calendar Events Tool

Tool Name: calendar_events

Handles EventKit calendar events (time blocks) with CRUD capabilities.

Actions: read, create, update, delete

Main Handler Functions:

handleReadCalendarEvents() - Read events with optional filters
handleCreateCalendarEvent() - Create calendar events
handleUpdateCalendarEvent() - Update existing events
handleDeleteCalendarEvent() - Delete calendar events

Parameters by Action

Read Action (action: "read"):

id (optional): Unique identifier of an event to read
filterCalendar (optional): Calendar name filter
search (optional): Keyword match against title, notes, or location
startDate (optional): Filter events starting on/after this date
endDate (optional): Filter events ending on/before this date

Create Action (action: "create"):

title (required): Event title
startDate (required): Start date/time
endDate (required): End date/time
targetCalendar (optional): Calendar name to create in
note, location, url, isAllDay (optional): Additional metadata

Update Action (action: "update"):

id (required): Event identifier
Other fields align with create parameters and are optional updates

Delete Action (action: "delete"):

id (required): Event identifier to remove

Calendar Collections Tool

Tool Name: calendar_calendars

Returns the available calendars from EventKit. This is useful before creating or updating events to confirm calendar identifiers.

Actions: read

Main Handler Function:

handleReadCalendars() - List all calendars with IDs and titles

Example Usage

{
  "action": "read"
}

Example Response

{
  "content": [
    {
      "type": "text",
      "text": "### Calendars (Total: 3)\n- Work (ID: cal-1)\n- Personal (ID: cal-2)\n- Shared (ID: cal-3)"
    }
  ],
  "isError": false
}

Response Formats

Success Response:

{
  "content": [
    {
      "type": "text",
      "text": "Successfully created reminder: Buy groceries"
    }
  ],
  "isError": false
}

Note about URL fields: The url field is fully supported by EventKit API. When you create or update a reminder with a URL parameter, the URL is stored in two places for maximum compatibility:

EventKit URL field: The URL is stored in the native url property (visible in Reminders app detail view via the "i" icon)
Notes field: The URL is also appended to the notes using a structured format for parsing

Dual Storage Approach:

URL field: Stores a single URL for native Reminders app display
Notes field: Stores URLs in a structured format for parsing and multiple URL support

Reminder note content here...

URLs:
- https://example.com
- https://another-url.com

This ensures URLs are accessible both in the Reminders app UI and through the API/notes for parsing.

URL Extraction: You can extract URLs from reminder notes using regex:

// Extract URLs from notes using regex
const urlsRegex = reminder.notes?.match(/https?:\/\/[^\s]+/g) || [];

Benefits of Structured Format:

Consistent parsing: URLs are always in a predictable location
Multiple URL support: Handle multiple URLs per reminder reliably
Clean separation: Note content and URLs are clearly separated
Backward compatible: Unstructured URLs still detected as fallback

List Response:

{
  "reminders": [
    {
      "title": "Buy groceries", 
      "list": "Shopping",
      "isCompleted": false,
      "dueDate": "2024-03-25 18:00:00",
      "notes": "Don't forget milk\n\nURLs:\n- https://grocery-store.com\n- https://shopping-list.com",
      "url": null
    }
  ],
  "total": 1,
  "filter": {
    "list": "Shopping",
    "showCompleted": false
  }
}

Organization Strategies

The server provides intelligent reminder organization capabilities through four built-in strategies:

Priority Strategy

Automatically categorizes reminders based on priority keywords:

High Priority: Contains words like "urgent", "important", "critical", "asap"
Medium Priority: Default category for standard reminders
Low Priority: Contains words like "later", "someday", "eventually", "maybe"

Due Date Strategy

Organizes reminders based on their due dates:

Overdue: Past due dates
Today: Due today
Tomorrow: Due tomorrow
This Week: Due within the current week
Next Week: Due next week
Future: Due beyond next week
No Date: Reminders without due dates

Category Strategy

Intelligently categorizes reminders by content analysis:

Work: Business, meetings, projects, office, client related
Personal: Home, family, friends, self-care related
Shopping: Buy, store, purchase, groceries related
Health: Doctor, exercise, medical, fitness, workout related
Finance: Bills, payments, bank, budget related
Travel: Trips, flights, hotels, vacation related
Education: Study, learn, courses, books, research related
Uncategorized: Doesn't match any specific category

Completion Status Strategy

Simple binary organization:

Active: Incomplete reminders
Completed: Finished reminders

Usage Examples

Organize all reminders by priority:

Organize my reminders by priority

Categorize work-related reminders:

Organize reminders from Work list by category

Sort overdue items:

Organize overdue reminders by due date

License

MIT

Contributing

Contributions welcome! Please read the contributing guidelines first.

Development

Install dependencies with pnpm (keeps the Swift bridge and TypeScript graph in sync):

pnpm install

Build the project (TypeScript and Swift binary) before invoking the CLI:

pnpm build

Run the full test suite to validate TypeScript, Swift bridge shims, and prompt templates:

pnpm test

Lint and format with Biome prior to committing:

pnpm exec biome check

Launching from nested directories

Available Scripts

pnpm build - Build the Swift helper binary (required before starting the server)
pnpm build:swift - Build the Swift helper binary only
pnpm dev - TypeScript development mode with file watching via tsx (runtime TS execution)
pnpm start - Start the MCP server over stdio (auto-fallback to runtime TS if no build)
pnpm test - Run the comprehensive Jest test suite
pnpm check - Run Biome formatting and TypeScript type checking

Dependencies

Runtime Dependencies:

@modelcontextprotocol/sdk ^1.20.2 - MCP protocol implementation
moment ^2.30.1 - Date/time handling utilities
exit-on-epipe ^1.0.1 - Graceful process termination handling
tsx ^4.20.6 - TypeScript execution and REPL
zod ^4.1.12 - Runtime type validation

Development Dependencies:

typescript ^5.9.3 - TypeScript compiler
@types/node ^24.9.2 - Node.js type definitions
@types/jest ^30.0.0 - Jest type definitions
jest ^30.2.0 - Testing framework
babel-jest ^30.2.0 - Babel Jest transformer
babel-plugin-transform-import-meta ^2.3.3 - Babel import meta transform
ts-jest ^29.4.5 - Jest TypeScript support
@biomejs/biome ^2.3.2 - Code formatting and linting

Build Tools:

Swift binaries for native macOS integration
TypeScript compilation for cross-platform compatibility