Apple Reminders and Calendar MCP

This MCP server wires Claude directly into macOS's native Reminders and Calendar apps via EventKit, which means you're working with the same data structures Apple's own apps use. No third-party sync, no API keys, no cloud middleman. You ask Claude to create a reminder with a due date and priority, and it appears instantly in the Reminders app on your Mac, iPhone, and iPad via iCloud. Same for calendar events. I've found it genuinely useful for the kind of task capture that happens mid-conversation. You're debugging something with Claude, realise you need to follow up on a different issue, and just say "remind me to check the staging logs tomorrow at 3pm". It handles recurring items properly, so weekly stand-up reminders or monthly invoice tasks work as expected. The calendar side is less impressive because most people already have a workflow for events, but it's handy when Claude is helping you plan a project timeline and can drop milestones straight into your calendar. The quirks are all macOS-specific. First launch requires granting EventKit permissions, which means a system dialogue you have to approve. If you're running Claude Desktop in a sandboxed environment or via Rosetta on Apple Silicon, you might hit permission issues. The server also assumes you want everything in your default Reminders list and calendar unless you specify otherwise, which is fine until you have a dozen lists and need to be explicit. Performance is solid because it's all local. No network latency, no rate limits. The trade-off is that this only works on macOS. If you're on Linux or Windows, or if you use Google Calendar and Todoist, this server is useless to you. It's also overkill if you rarely use Apple's own productivity apps. But if you live in Reminders and Calendar, and you want Claude to interact with them as naturally as you do, this is the cleanest integration I've seen. No web scraping, no Shortcuts hacks, just native EventKit calls.