Outlook MCP vs Aruba Email & Calendar

In-depth architectural comparison of the Outlook MCP and Aruba Email & Calendar 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 Outlook MCP when:

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

Explore Outlook MCP Details

Choose Aruba Email & Calendar when:

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

Explore Aruba Email & Calendar Details

Feature & Specification Comparison

Specification	Outlook MCP Communication	Aruba Email & Calendar Communication
Summary	Microsoft Outlook MCP server — 20 tools for email, calendar, contacts, and settings via Graph API.	MCP server for Aruba email and calendar via IMAP/SMTP/CalDAV
Category & Scope	Communication	Communication
Quality signal

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": {
    "outlook-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@littlebearapps/outlook-assistant"
      ]
    }
  }
}

{
  "mcpServers": {
    "aruba-email-calendar": {
      "command": "uvx",
      "args": [
        "mcp-aruba"
      ]
    }
  }
}

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