mcp-fantastical

Provides an MCP server for the macOS Fantastical calendar app. It uses AppleScript (and optionally a native EventKit/Swift helper) to create events from natural language, list today/upcoming events, search events, open Fantastical to a date, and list available calendars.

Evaluated Mar 30, 2026 (21d ago)

Repo ↗ Ai Ml mcp calendar macos fantastical applescript productivity claude event-management search

⚙ Agent Friendliness

/ 100

Can an agent use this?

🔒 Security

/ 100

Is it safe for agents?

⚡ Reliability

/ 100

Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality

Documentation

Error Messages

Auth Simplicity

Rate Limits

🔒 Security

TLS Enforcement

Auth Strength

Scope Granularity

Dep. Hygiene

Secret Handling

Relies on local AppleScript/UI automation and macOS TCC permissions rather than network auth. Granting Accessibility and full calendar access increases risk if the process is compromised. No mention of encrypting data in transit (likely local-only) or fine-grained scopes. No dependency/security audit info provided.

⚡ Reliability

Uptime/SLA

Version Stability

Breaking Changes

Error Recovery

Best When

You’re on macOS with Fantastical installed and want an MCP tool that can translate conversational requests into local calendar actions.

Avoid When

You can’t or won’t grant macOS TCC permissions (Accessibility and Calendar access) or you need a server-side/API-based integration that doesn’t rely on local UI automation/Apple events.

Use Cases

• Create calendar events from natural-language requests
• Read today’s and upcoming events without leaving chat
• Search calendar events by title/location/notes
• Navigate/open Fantastical to specific dates
• List available Fantastical calendars

Not For

• Use on non-macOS systems
• Use as a general calendar API for remote servers (it’s local/macOS integration)
• Automated high-throughput workloads where reliability/latency requirements are strict

Interface

REST API

GraphQL

gRPC

MCP Server

Yes

SDK

Webhooks

Authentication

Methods: macOS TCC permissions for Accessibility and Calendars (no API keys mentioned)

OAuth: No Scopes: No

Authentication is implicit via local macOS permissions granted to the terminal/process running the MCP server; no user-facing tokens/scopes are described.

Pricing

Free tier: No

Requires CC: No

No pricing information provided; appears to be an open-source npm package.

Agent Metadata

Pagination

none

Idempotent

False

Retry Guidance

Not documented

Known Gotchas

⚠ macOS TCC permission inheritance issues can cause calendar read failures when spawned as a subprocess (permissions/timeouts).
⚠ AppleScript may fail with “Not authorized to send Apple events” unless Accessibility permission is granted.
⚠ The native EventKit helper is recommended to mitigate permission issues; build steps may be required for it to be available.
⚠ macOS-only constraint: server won’t function outside macOS/Fantastical environment.

Alternatives

Fantastical/Calendar integrations that use EventKit directly (native Swift helpers) if available Other MCP calendar servers that use a standardized API or EventKit without AppleScript Manually using Fantastical automation tools (Shortcuts/URL schemes) where appropriate

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Scores are editorial opinions as of 2026-03-30.