Cal.com MCP Server ★ New (July 3)¶

Overview¶

Cal.com MCP (calcom-mcp) brings the leading open-source scheduling platform directly into AI agents. Create event types, check availability, book meetings, and manage your entire scheduling infrastructure — all through natural language. Official MCP server from Cal.com.

Key advantage: Eliminate the back-and-forth of scheduling. AI agents can book meetings, check calendars, and manage availability without leaving the conversation.

Key Features¶

Event type management: Create, update, and configure meeting types with custom durations, locations, and availability
Booking operations: Check availability in real-time and book meetings directly
Calendar sync: Query connected calendars (Google, Outlook, iCloud) for conflicts
Team scheduling: Manage round-robin, collective, and managed event types for teams
Webhook & workflow: Trigger automations on booking events
Hosted endpoint: Official remote MCP at mcp.cal.com — no local installation needed

Installation¶

# Add to Hermes (remote endpoint)
hermes mcp add calcom --url https://mcp.cal.com/mcp

# Authenticate (OAuth flow — opens browser)
hermes mcp auth calcom
# → Authorize Cal.com access
# → Done. Scheduling tools available.

Manual Configuration¶

{
  "mcpServers": {
    "calcom": {
      "type": "sse",
      "url": "https://mcp.cal.com/mcp",
      "headers": {
        "Authorization": "Bearer ${CALCOM_API_KEY}"
      }
    }
  }
}

Prerequisites¶

Cal.com Account: Sign up at cal.com (free tier available)
API Key: Generate from Settings → Developer → API Keys
Connected Calendar: At least one calendar connected (Google, Outlook, etc.)

Business Use Cases¶

Client Meeting Automation: AI agents can find mutual availability and book client meetings in one conversation
Sales Scheduling: Qualify leads → check SDR calendar → book discovery call — all agent-driven
Interview Coordination: HR agents can schedule multi-participant interviews across interviewer calendars
Service Delivery: Consultants can expose booking links, check availability, and confirm appointments via agent
Internal Operations: Team members ask AI agent "when's our next standup free?" and get booked instantly

Business Relevance¶

Cal.com is the scheduling backbone for thousands of businesses. Adding MCP support means every AI agent can now participate in scheduling workflows — not just read calendars. This is infrastructure-level: every operator who uses Cal.com gets AI scheduling for free.

Limitations¶

Remote endpoint requires API key authentication (OAuth coming)
Team features require Cal.com Teams plan
Calendar sync limited to connected calendars (no arbitrary ICS support yet)
Rate limits apply per API key tier