Create Calendar Events on Mac with AI

The create_calendar_event tool lets an AI assistant add events directly to your Mac's built-in Calendar app (Calendar.app). You describe the event in plain English and the AI fills in the details, picks the right calendar, and saves it — no copy-pasting, no switching windows. Every event needs a title, a start date and an end date; you can optionally invite people by email on CalDAV or Exchange calendars.

A concrete example — you just type:

"Create a calendar event called 'Dentist appointment' next Tuesday from 3pm to 4pm."

The AI parses the natural-language time, creates the event in your Calendar app, and confirms it. If you're on Microsoft 365, use m365_create_event instead, which targets your Outlook/Microsoft 365 calendar through Graph.

LMCP is a free, native macOS MCP server with 188+ tools. It connects AI assistants to the real apps already on your Mac — Calendar, Mail, Contacts, Reminders, Notes and more — running entirely on your machine. Download LMCP to get started.

Which AI assistants can use create_calendar_event?

create_calendar_event works with every major AI client that supports MCP:

• Desktop apps — desktop AI apps connect through local stdio, and LMCP sets up the ones it can automatically. They talk to the Mac directly, with no network hop.
• Web AIs — ChatGPT, Claude.ai (web), Grok and Perplexity connect through the LMCP Cloud Relay connector, which securely bridges the web client to the LMCP server running on your Mac.

Whichever you use, the event is created locally in Calendar.app.

Can my AI automate create_calendar_event and chain it with other apps?

This tool shines when chained with others. The AI can read_email to pull a meeting request, use list_contacts to resolve an attendee's address, then call create_calendar_event to block the time and send the invite — all from one prompt. It pairs naturally with list_calendar_events to check for conflicts before booking, and with create_reminder so you get a nudge beforehand. Say "Schedule a 30-minute review with the people on this email thread tomorrow afternoon" and the AI orchestrates the whole sequence.

Does create_calendar_event work with my real Mac data?

Because LMCP reads your real Mac data, the AI isn't guessing. It sees your existing calendars by name, knows which account each belongs to, and can reason about your actual schedule. When you say "book it on my Work calendar," it picks the right one. When you reference "the client from yesterday's meeting," it can look that up in Contacts. The result is events that land in the right place with the right people, not generic placeholders.

How much time does create_calendar_event save?

LMCP executes local tools on your device. Cloud AI providers and connected services can receive requested data; their terms apply.

Is create_calendar_event private and GDPR-compliant?

LMCP executes local tools on your device. Cloud AI providers and connected services can receive requested data; their terms apply. Local execution alone does not establish GDPR or CCPA compliance. Assess the data you authorize, the selected AI provider, connected services and your organizational requirements.