Calendesk MCP Server

Connect your Calendesk booking platform to Claude, Claude Desktop, Claude Code, and other MCP-compatible AI tools. Manage bookings, customers, employees, services, and view business analytics — all through natural language. 32 tools, OAuth sign-in, no data leaves your Calendesk account.

Prerequisites

• A Calendesk account

Related MCP server: @aiwerk/mcp-server-cal

Setup

Claude.ai (recommended)

No installation or API keys needed. Uses OAuth for secure authentication.

1. Go to Settings → Connectors in Claude.ai

2. Click Add custom connector

3. Enter:

   • Name: Calendesk

   • Remote MCP server URL: https://claude.calendesk.com

4. Click Add

5. Log in with your Calendesk credentials when prompted (OAuth — no API keys to copy)

Claude Desktop

Add to your config file (~/.config/claude/claude_desktop_config.json on macOS/Linux, %APPDATA%\Claude\claude_desktop_config.json on Windows):

{
    "mcpServers": {
        "calendesk": {
            "url": "https://mcp.calendesk.com",
            "headers": {
                "X-Api-Key": "your-api-key",
                "X-Tenant": "your-tenant-id"
            }
        }
    }
}

Generate your API key in Admin Panel → Settings → API.

Claude Code

claude mcp add calendesk https://mcp.calendesk.com \
  --transport http \
  --header "X-Api-Key: your-key" \
  --header "X-Tenant: your-tenant"

Other MCP clients (STDIO proxy)

For clients that don't support HTTP transport:

pip install calendesk-mcp-server
# or: uvx calendesk-mcp-server

{
    "mcpServers": {
        "calendesk": {
            "command": "uvx",
            "args": ["calendesk-mcp-server"],
            "env": {
                "CALENDESK_API_KEY": "your-api-key",
                "CALENDESK_TENANT": "your-tenant-id"
            }
        }
    }
}

Supported Tools

Events & Bookings

• list_events - List calendar events (bookings, blocks/vacation, group bookings) with filters

• get_booking - Get details of a specific booking by ID

• create_booking - Create a new booking/appointment

• update_booking - Update an existing booking

• delete_booking - Delete a booking

• get_group_booking - Get details of a group booking

• check_event_overlaps - Check for scheduling conflicts

• get_unavailable_slot - Get details of a block/vacation slot

• create_unavailable_slot - Create a block/vacation for an employee

• update_unavailable_slot - Update a block/vacation slot

• delete_unavailable_slot - Delete a block/vacation slot

Customers

• search_users - Search customers by name, email, or phone

• get_user - Get customer details by ID

• list_users - List all customers with optional filtering

• create_user - Create a new customer

• update_user - Update customer information

• delete_user - Delete a customer

Employees

• list_employees - List all employees/staff members

• get_employee - Get employee details

• delete_employee - Delete an employee

Services & Availability

• list_services - List all available services

• get_service - Get service details including duration, price, and locations

• get_available_slots - Get available time slots for booking

• list_availability - Get availability schedules/working hours

• get_availability - Get a specific availability schedule

• list_service_types - Get all service categories with their services

• list_products - Get all products available for sale

• list_tags - Get all available tags

Analytics & Statistics

• get_stats - Business analytics: dashboard KPIs, revenue, bookings, employee performance, services, customers, patterns, payments, subscriptions, locations, products, forecast. Use type parameter to select report.

Settings & Notifications

• get_settings - Get business settings (timezone, currency, company info)

• get_me - Get current user profile and employee information

• send_notification - Send email, SMS, or push notification

Permissions and access

Access mirrors your Calendesk role and permissions — the connector can only do what your own Calendesk user can do in the admin panel. An employee who connects their account sees exactly what they'd see when they log in, and nothing more.

• Read tools (listing, viewing, search, analytics) run without extra prompts.

• Write tools (create/update/delete bookings, customers, and blocks; send notifications) are marked as destructive, so Claude asks for your confirmation before each one.

If your email belongs to more than one Calendesk company, you choose which one to connect during sign-in. Every tool call is scoped to that single tenant.

Data handling and security

• First-party only. Every tool call goes to Calendesk's own API over HTTPS. No third-party services are involved, and no data is sold or shared.

• Your account data only. The server reads and writes bookings, customers, employees, services, settings, and analytics within your Calendesk account. It never touches data outside your tenant.

• OAuth, no shared keys. Claude.ai connects with OAuth 2.1 (authorization code + PKCE, with Dynamic Client Registration). Access and refresh tokens are issued by Calendesk and used only to call the Calendesk API on your behalf. Self-hosted setups use an API key and tenant id you generate yourself.

• No conversation storage. The server processes each tool call and returns the result. It does not store, log, or forward your conversation, chat history, or messages.

• You stay in control. Disconnect the connector at any time from Claude.ai Settings → Connectors, or revoke the API key in your Calendesk admin panel.

Data collection and retention are described in the Calendesk Privacy Policy.

Examples

Check today's schedule

You: "What does my schedule look like today?"

The assistant calls list_events with today's date and returns:

You have 4 appointments today:

Time	Service	Customer	Status
09:00–10:00	Haircut	Maria Kowalska	Approved
10:30–11:30	Hair Coloring	Anna Wiśniewska	Approved
13:00–14:00	Haircut	Jan Nowak	Approved
15:00–16:00	Beard Trim	Tomasz Zieliński	Approved

Find available slots and book an appointment

You: "When can I schedule a 60-minute consultation with Dr. Kowalski next week?"

The assistant calls get_available_slots for the service and employee, then responds:

Dr. Kowalski has these openings next week:

Monday: 09:00, 11:00, 14:00 Tuesday: 10:00, 13:00, 15:00 Thursday: 09:00, 11:00

Would you like me to book one of these?

You: "Book Monday at 11:00 for customer anna@example.com"

The assistant calls search_users to find the customer, then check_event_overlaps to verify no conflicts, and finally create_booking:

Booking confirmed:

• Service: Consultation (60 min)

• Employee: Dr. Kowalski

• Customer: Anna Wiśniewska (anna@example.com)

• When: Monday, March 17 at 11:00–12:00

• Booking ID: #4521

View business performance

You: "How did the business do last month compared to the month before?"

The assistant calls get_stats (dashboard report) with the date range:

February 2026 vs January 2026:

Metric	February	Change
Revenue	€12 500	+8.5%
Bookings	285	+12
New customers	18	+5
Cancellation rate	3.5%	−0.8pp

Revenue is trending up, driven mainly by an increase in Hair Coloring bookings (+22%).

Search for a customer

You: "Find me the contact info for customer Kowalska"

The assistant calls search_users:

Found 2 matches:

1. Maria Kowalska — maria@example.com, +48 512 345 678 (last visit: March 5)

2. Ewa Kowalska — ewa.k@example.com, +48 601 234 567 (last visit: February 12)

Send a notification

You: "Send Maria Kowalska an email reminder about her appointment tomorrow"

The assistant calls send_notification:

Email sent to Maria Kowalska (maria@example.com) with a reminder about her Haircut appointment tomorrow at 09:00.

Environment Variables (STDIO mode only)

Development

1. Clone the repository:

   git clone https://github.com/calendesk/calendesk-mcp-server.git
   cd calendesk-mcp-server

2. Create .env file:

   cp .env.example .env
   # Edit .env with your CALENDESK_API_KEY and CALENDESK_TENANT

3. Install dependencies:

   pip install -e .

4. Start the MCP Inspector (requires Node.js):

   mcp dev calendesk_mcp/server.py:mcp

   Opens a web UI at http://localhost:6274 where you can test tools interactively.

Privacy Policy

Calendesk Privacy Policy

Support

For questions or issues with the MCP server integration, contact us at support@calendesk.com.