MCP iCal Server

📅 MCP iCal Server – Agent‑Powered Calendar Management for macOS

The MCP iCal Server solves a common pain point for developers and power users who rely on AI assistants to manage their daily schedules: the friction of juggling multiple calendar tools, remembering API keys, and translating natural‑language requests into precise event data. By exposing a single, stateful MCP tool (), the server lets an AI client delegate all calendar interactions to a dedicated, context‑aware agent that speaks directly to the macOS Calendar app. This eliminates boilerplate, reduces the attack surface for credential leakage, and gives developers a clean, predictable interface that can be reused across projects.

At its core, the server is an OpenAI Agent SDK wrapper that transforms conversational prompts into structured calendar operations. Developers can embed the tool in any MCP‑compatible workflow, letting an assistant answer questions like “What’s on my schedule next week?” or create events with natural language such as “Schedule a lunch meeting with Sarah tomorrow at noon.” The agent maintains session state, so follow‑up edits (“Move the meeting to 3 PM”) are applied contextually without needing to resend full event details. This conversational continuity mirrors how humans plan, making the assistant feel more intuitive and less like a command line.

Key capabilities include:

• Natural‑language event creation with support for custom calendars, locations, notes, reminders, and recurring patterns.
• Smart availability queries that return free time slots for proposed meeting durations.
• Intelligent updates—time, date, calendar, location, notes, reminders, and recurrence can all be modified through a single phrase.
• Full calendar discovery with suggestions for optimal calendars, especially useful when Google Calendar is synced to iCloud.
• Zero‑config operation: the agent automatically handles parsing and validation, freeing developers from writing custom parsers.

Real‑world use cases span from personal productivity apps that let users “Add a dentist appointment to my Personal calendar for next Wednesday at 3 PM” to enterprise scheduling tools that integrate with team calendars and automatically suggest optimal meeting times. Because the server is MCP‑compatible, it can be plugged into Claude for Desktop, LangChain, or any other client that understands the protocol, enabling seamless inclusion in larger automation pipelines.

What sets this MCP server apart is its agent‑centric design. Instead of exposing a plethora of discrete tools, it offers one robust entry point that internally orchestrates complex calendar logic. This not only simplifies client code but also ensures consistent behavior across sessions, making it an attractive choice for developers who want reliable calendar automation without managing stateful APIs themselves.