CalDAV calendars vs CardDAV address books

In-depth architectural comparison of the CalDAV calendars and CardDAV address books 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.

Which MCP Server Should You Choose?

Choose CalDAV calendars when:

• You need dedicated capabilities in the Developer Tools domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore CalDAV calendars Details

Choose CardDAV address books when:

• You need dedicated capabilities in the Developer Tools domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore CardDAV address books Details

Feature & Specification Comparison

Specification	CalDAV calendars Developer Tools	CardDAV address books Developer Tools
Summary	Read and write CalDAV calendars: events, tasks and journal entries over the open standard	Read and write CardDAV address books: contacts, groups and photos over the open standard
Category & Scope	Developer Tools	Developer Tools

Tools & Capabilities Breakdown

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).

{
  "mcpServers": {
    "caldav-calendars": {
      "command": "npx",
      "args": [
        "-y",
        "@ni-c/caldav-mcp"
      ]
    }
  }
}

{
  "mcpServers": {
    "carddav-address-books": {
      "command": "npx",
      "args": [
        "-y",
        "@ni-c/carddav-mcp"
      ]
    }
  }
}

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