# Multi Calendar MCP server

Outlook.com, Microsoft 365, Google calendars: free time, events, invitations, booking pages, polls.

## At a glance

Multi Calendar is an MCP server in the Productivity category. It is hosted remotely and connects over HTTP, and declares no required credentials. It exposes 21 tools, including calendars_list, events_list and events_get. It scores B (73/100) on the MCP Skills Hub health score as of Oct 28, 2026.

## Install

### How to install Multi Calendar in Claude Code

1. Add the server

```bash
claude mcp add --transport http calendar https://calendar.lumman.co/mcp
```

2. Verify it's connected

```bash
claude mcp list
```

3. Sharing it with your team?

   Add `--scope project` to write it to .mcp.json in the repository root, which you can commit (with the secrets left as environment variables).

4. Use it in a session

   Ask Claude to use the tools this server exposes (e.g. calendars_list, events_list, events_get). It discovers them automatically.

### How to install Multi Calendar in Claude Desktop

1. Open your MCP config

   macOS: ~/Library/Application Support/Claude/claude_desktop_config.json · Windows: %APPDATA%\Claude\claude_desktop_config.json

2. Add this server

```json
{
  "mcpServers": {
    "calendar": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://calendar.lumman.co/mcp"
      ]
    }
  }
}
```

3. Why the wrapper?

   This is a remote (HTTP) server and Claude Desktop only launches local processes, so mcp-remote proxies the connection. It will open a browser window if the server needs OAuth.

4. Restart Claude Desktop

   The tools appear under the 🔌 menu once the app reloads.

### How to install Multi Calendar in Cursor

1. Create / edit .cursor/mcp.json in your project

```json
{
  "mcpServers": {
    "calendar": {
      "url": "https://calendar.lumman.co/mcp"
    }
  }
}
```

2. Enable it

   Cursor Settings → MCP → toggle the server on. Tools become available to the Composer/Agent.

### How to install Multi Calendar in Codex CLI

1. Add to ~/.codex/config.toml

```toml
[mcp_servers.calendar]
command = "npx"
args = ["-y", "mcp-remote", "https://calendar.lumman.co/mcp"]
```

2. Why the wrapper?

   Codex runs MCP servers as local processes, so mcp-remote bridges this HTTP endpoint to stdio.

3. Run Codex

   Codex loads MCP servers from config.toml on startup and exposes their tools to the agent.

### How to install Multi Calendar in Windsurf

1. Edit ~/.codeium/windsurf/mcp_config.json

```json
{
  "mcpServers": {
    "calendar": {
      "serverUrl": "https://calendar.lumman.co/mcp"
    }
  }
}
```

2. Reload

   Windsurf → Cascade → refresh MCP servers. Cascade can now call the tools.

### How to install Multi Calendar in Cline

1. Open Cline → MCP Servers → Configure

   Adds to cline_mcp_settings.json.

2. Add the server

```json
{
  "mcpServers": {
    "calendar": {
      "type": "streamableHttp",
      "url": "https://calendar.lumman.co/mcp"
    }
  }
}
```

### How to install Multi Calendar in VS Code

1. Create .vscode/mcp.json

```json
{
  "servers": {
    "calendar": {
      "type": "http",
      "url": "https://calendar.lumman.co/mcp"
    }
  }
}
```

2. Start it

   VS Code shows a ▶ Start action above the server entry. Agent mode (Copilot Chat) can then use the tools.

## Tools

- `calendars_list` — List calendars
- `events_list` — Read events
- `events_get` — Read an event
- `free_times_find` — Find a time
- `events_create` — Create an event
- `events_edit` — Change an event
- `events_cancel` — Cancel an event
- `events_respond` — Answer an invitation
- `preferences_get` — Read scheduling preferences
- `preferences_set` — Change scheduling preferences
- `busy_everywhere_set` — Show busy time everywhere
- `booking_links_create` — Make a booking link
- `booking_page_set` — Set up a booking page
- `polls_create` — Make a group poll
- `polls_results` — Read a poll's answers
- `polls_book` — Book a poll's time
- `links_polls_list` — List open links and polls
- `links_polls_close` — Close a link or poll
- `circles_invite` — Invite people into a circle
- `circles_list` — List circles
- `circles_free_times_find` — Find a time for a circle

Source repository: https://github.com/lumman-lab/multi-calendar

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Source: https://mcp-skills-hub.vercel.app/mcps/co-lumman-calendar · MCP Skills Hub · data as of 2026-10-28T12:31:05Z