// SCAN REPORT

Fantastical MCP

16 tools. 2 can modify or destroy data without limits.

2 write tools that can modify data. Rate limits recommended.

Last updated: 12 Jun 2026

2 can modify or destroy data

14 read-only

16 tools total

Community server · catalogue entry verified 12/06/2026

How to control Fantastical MCP ↓

TOOL MAP

What Fantastical MCP exposes to your agents

Read (14) Write / Execute (2) Destructive / Financial (0)

Running more than one server? Check your whole stack →

MOST DANGEROUS TOOLS

High Risk

The most dangerous Fantastical MCP tools

Execute · Low show_date This tool triggers an external application action (opening Fantastical's UI to a specific date) via URL schemes. Write · Medium create_event The tool creates calendar events, which is a reversible write operation.

2 of Fantastical MCP's 16 tools can modify, destroy, or commit something on every call — and an agent calls them with no built-in limits.

POLICY

How to control Fantastical MCP

PolicyLayer is an MCP gateway — it sits between your AI agents and Fantastical MCP, and nothing reaches the server without passing your rules. These are the rules we recommend:

Rate limit write operations

{
  "create_event": {
    "limits": [
      {
        "counter": "create_event_per_hour",
        "window": "hour",
        "max": 30,
        "scope": "grant"
      }
    ]
  }
}

Prevents bulk unintended modifications from agents caught in loops.

Cap read operations

{
  "get_availability": {
    "limits": [
      {
        "counter": "get_availability_per_minute",
        "window": "minute",
        "max": 60,
        "scope": "grant"
      }
    ]
  }
}

Controls API costs and prevents retry loops from exhausting upstream rate limits.

Create a free account and register Fantastical MCP — nothing to install.
Add these rules — paste them, or build them visually. Tune the limits to your setup.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

ENFORCE POLICY ON FANTASTICAL →

Free to start. No card required.

FULL CATALOGUE

All 16 Fantastical MCP tools

EXECUTE 1 tools

Execute show_date Open Fantastical's mini calendar to a specific date.

WRITE 1 tools

Write create_event create_event

READ 14 tools

Read get_availability Show free/busy time slots for a specific date. Read get_calendars List all calendars with their event counts. Read get_event Get full details for a specific event by its ID. Read get_event_json Machine-readable variant of get_event. Returns None-valued fields Read get_events_by_calendar Get events from a specific calendar. Read get_events_in_range get_events_in_range Read get_invitations List pending event invitations that need a response. Read get_recent Show the most recently added or synced calendar events. Read get_recurring get_recurring Read get_today Get all calendar events for today, grouped by calendar. Read get_today_json get_today_json Read get_upcoming Get calendar events for the next N days, grouped by date. Read get_upcoming_json Machine-readable variant of get_upcoming. Read search_events Search events by title, location, notes, or attendees.

FAQ

Questions about Fantastical MCP

How do I prevent bulk modifications through Fantastical MCP? +

The Fantastical MCP server has 1 write tools including create_event. Set a rate limit in your policy -- for example, 10 calls per hour prevents an agent from making more than 10 modifications per hour. PolicyLayer enforces this at the gateway, before calls reach Fantastical MCP.

How many tools does the Fantastical MCP server expose? +

16 tools across 2 categories: Read, Write. 14 are read-only. 2 can modify, create, or delete data.

How do I enforce a policy on Fantastical MCP? +

Register the Fantastical MCP server in PolicyLayer, apply the suggested rules above (adjust the limits to your use case), and point your AI client at the PolicyLayer proxy URL instead of the server directly. Your agents keep the same tools; PolicyLayer evaluates every call against policy before it executes. Nothing to install, live in minutes.

Enforce policy on every Fantastical MCP tool call.

Deterministic rules across all 16 Fantastical MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

ENFORCE POLICY ON FANTASTICAL →

Free to start. No card required.

16 Fantastical MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.