Mcp Server — independently scanned and version-tracked by SaferSkills.
SaferSkills independently audited Mcp Server (Agent Skill) and scored it 100/100 (green). The audit ran 55 deterministic rules across Security, Supply Chain, Maintenance, Transparency, and Community; it found 0 high-severity and 0 lower-severity findings. The full rule-by-rule trace and per-finding evidence are below. Free, methodology-open.
Findings & checks · 0 flagged
Every scanned point with the score it earned and what moved between them.
First recorded scan — no prior version to compare against.
The primary manifest — the file an agent reads to learn what this artifact does.
Give your AI agents the power to schedule meetings. The official Model Context Protocol server for Astrocal — the API-first scheduling platform built for developers and AI agents.
Works with Claude Desktop, Cursor, Windsurf, and any MCP-compatible client. Your AI assistant can check availability, book meetings, cancel, reschedule, and manage waitlists — all through natural conversation.
Get your API key | Documentation | API Reference
ac_test_* keys. No emails sent, no calendar events created, no charges made.Add to your claude_desktop_config.json:
{
"mcpServers": {
"astrocal": {
"command": "npx",
"args": ["-y", "@astrocal/mcp-server"],
"env": {
"ASTROCAL_API_KEY": "ac_live_xxxxxxxxxxxxx"
}
}
}
}Restart Claude Desktop and the scheduling tools will be available immediately.
Install globally:
npm install -g @astrocal/mcp-serverRun:
ASTROCAL_API_KEY=ac_live_xxx astrocal-mcp| Variable | Required | Description |
|---|---|---|
ASTROCAL_API_KEY | Yes | Your Astrocal API key (get one free) |
ASTROCAL_API_URL | No | API base URL (default: https://api.astrocal.dev) |
ASTROCAL_DEFAULT_EVENT_TYPE_ID | No | Default event type ID — your agent won't need to specify it on every call |
check_availabilityCheck available time slots for booking.
event_type_id (string, optional) — Event type to check. Optional if ASTROCAL_DEFAULT_EVENT_TYPE_ID is set.start_date (string, required) — Start date in ISO 8601 format (e.g., 2026-03-15)end_date (string, required) — End date in ISO 8601 format (e.g., 2026-03-22)timezone (string, optional) — IANA timezone (e.g., America/New_York). Defaults to UTC.create_bookingBook a meeting at a specific time.
event_type_id (string, optional) — Event type to book. Optional if default is set.start_time (string, required) — ISO 8601 datetime (e.g., 2026-03-15T14:00:00Z)invitee_name (string, required) — Full name of the person bookinginvitee_email (string, required) — Email address for calendar invitationinvitee_timezone (string, optional) — IANA timezone. Defaults to UTC.notes (string, optional) — Meeting notes (max 1000 characters)cancel_bookingCancel an existing booking. The invitee receives a cancellation email automatically.
booking_id (string, required) — ID of the booking to cancelreason (string, optional) — Cancellation reason (max 500 characters)reschedule_bookingReschedule a booking to a new time. Check availability first.
booking_id (string, required) — ID of the booking to reschedulenew_start_time (string, required) — New time in ISO 8601 formatreason (string, optional) — Reason for rescheduling (max 500 characters)list_bookingsList bookings with optional filters.
status (string, optional) — Filter: confirmed, cancelled, or pending_paymentlimit (number, optional) — Max results (default: 10, max: 100)event_type_id (string, optional) — Filter by event typelist_event_typesList available event types that can be booked. No input required.
join_waitlistJoin the waitlist when all slots are full.
event_type_id (string, required) — Event type to join the waitlist forname (string, required) — Full nameemail (string, required) — Email addresspreferred_times (string, optional) — Preferred time ranges or notescheck_waitlistCheck your position on a waitlist.
waitlist_entry_id (string, required) — Waitlist entry ID returned from join_waitlistUser: "What meetings can I book?"
>
Agent: _calls list_event_types_ — "You have two event types: a 30-minute consultation (free) and a 1-hour strategy session ($50).">
User: "Check if next Tuesday at 2pm is free for a consultation"
>
Agent: _calls check_availability_ — "Tuesday at 2pm is available.">
User: "Book it for [email protected]"
>
Agent: _calls create_booking_ — "Done! Meeting confirmed for Tuesday, March 17 at 2:00 PM UTC with Jane. A calendar invitation has been sent.">
User: "Actually, move it to 3pm"
>
Agent: _calls reschedule_booking_ — "Rescheduled to 3:00 PM. Jane has been notified."This MCP server is one of several ways to integrate with Astrocal:
@astrocal/react) — Typed hooks, provider, and booking widget for React apps@astrocal/widget) — Drop-in booking UI for any websiteCreate a free account to get started.
MIT
~30 seconds. Free. No account. Every finding cites a rule and a line of evidence.