What is the key difference between Caldav MCP and Feishu User Plugin?

Caldav MCP belongs to the Workplace & Productivity category with local stdio execution, while Feishu User Plugin belongs to the Workplace & Productivity category with local stdio execution.

How do I install Caldav MCP or Feishu User Plugin in Claude Desktop or Cursor?

Copy the mcpServers JSON configuration snippet provided on this page into your claude_desktop_config.json or ~/.cursor/mcp.json file and restart your AI client.

Are Caldav MCP and Feishu User Plugin free or paid?

Caldav MCP operates under a Free / Open Source model (other). Feishu User Plugin operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Caldav MCP lists 22 tools with 2 views and 103 GitHub stars. Feishu User Plugin lists 6 tools with 1 views and 10 GitHub stars.

Can I use both Caldav MCP and Feishu User Plugin together in the same MCP host?

Yes! MCP hosts like Claude Desktop, Cursor, Windsurf, Cline, and VS Code support configuring multiple servers under the mcpServers object simultaneously.

Side-by-Side Model Context Protocol Comparison

Caldav MCP vs Feishu User Plugin

In-depth architectural comparison of the Caldav MCP and Feishu User Plugin MCP servers. Compare execution transports, security boundaries, tool capabilities, quality scores, and ready-to-paste client installation snippets for Claude, Cursor, Windsurf, and VS Code.

At a Glance & Executive Verdict

Caldav MCP

Workplace & Productivity · Local stdio

Quality: 63/100 (Good) | Auth: other

Feishu User Plugin

Workplace & Productivity · Local stdio

Quality: 52/100 (Good) | Auth: No auth required

Verdict Summary: Choose Caldav MCP if you need specialized Workplace & Productivity tools running via a local process. Choose Feishu User Plugin if your workspace requires Workplace & Productivity integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Caldav MCP when:

You need dedicated capabilities in the Workplace & Productivity domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: other (Free / Open Source).
You have access to required keys: CALDAV_BASE_URL, CALDAV_USERNAME, CALDAV_PASSWORD.
Primary tools included: start, end, calendarUrl.

Explore Caldav MCP Details

Choose Feishu User Plugin when:

You need dedicated capabilities in the Workplace & Productivity domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: No auth required (Free / Open Source).
You have access to required keys: LARK_COOKIE, LARK_APP_ID, LARK_APP_SECRET, LARK_USER_ACCESS_TOKEN, LARK_USER_REFRESH_TOKEN.
Primary tools included: .

Feature & Specification Comparison

Specification	Caldav MCP Workplace & Productivity	Feishu User Plugin EthanQC Workplace & Productivity
Summary	CalDAV calendar operations (list, create, update, delete events) as MCP tools.	All-in-one Feishu/Lark MCP server (84 tools). Send messages as the actual user (not bot), plus full official-API coverage of docs, bitable, wiki, drive, calendar, tasks, OKR. Cookie + OAuth UAT + app-credential auth.
Category & Scope	Workplace & Productivity

Tools & Capabilities Breakdown

Caldav MCP Tools (22)

start

string — Start date (ISO 8601)

end

string — End date (ISO 8601)

calendarUrl

string

summary

string

wholeDay

boolean (optional) — Create as a whole-day event

description

string (optional)

location

string (optional)

Ready-to-Paste Client Configurations

Paste either (or both) of these JSON server blocks into your client config file (e.g. claude_desktop_config.json or ~/.cursor/mcp.json).

Caldav MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "caldav-mcp": {
      "command": "npx",
      "args": [
        "caldav-mcp"
      ],
      "env": {
        "CALDAV_BASE_URL": "YOUR_CALDAV_BASE_URL_HERE",
        "CALDAV_USERNAME": "YOUR_CALDAV_USERNAME_HERE",
        "CALDAV_PASSWORD": "YOUR_CALDAV_PASSWORD_HERE"
      }
    }
  }
}

Feishu User Plugin Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "ethanqc-feishu-user-plugin": {
      "command": "npx",
      "args": [
        "-y",
        "feishu-user-plugin"
      ],
      "env": {
        "LARK_COOKIE": "YOUR_LARK_COOKIE_HERE",
        "LARK_APP_ID": "YOUR_LARK_APP_ID_HERE",
        "LARK_APP_SECRET": "YOUR_LARK_APP_SECRET_HERE",
        "LARK_USER_ACCESS_TOKEN": "YOUR_LARK_USER_ACCESS_TOKEN_HERE",
        "LARK_USER_REFRESH_TOKEN": "YOUR_LARK_USER_REFRESH_TOKEN_HERE"
      }
    }
  }
}

Frequently Asked Questions

Caldav MCP is categorized under Workplace & Productivity and uses a local stdio subprocess. In contrast, Feishu User Plugin belongs to Workplace & Productivity using local stdio subprocess. Select Caldav MCP when you need capabilities focused on workplace & productivity and Feishu User Plugin when you require tools for workplace & productivity.

More alternatives to Caldav MCP More alternatives to Feishu User Plugin Workplace & Productivity category hub