JMAP Email vs Aruba Email & Calendar

In-depth architectural comparison of the JMAP Email 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 JMAP Email 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 JMAP Email 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	JMAP Email Communication	Aruba Email & Calendar Communication
Summary	Email management via JMAP — mailboxes, messages, identities, and Sieve scripts	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": {
    "jmap-email": {
      "command": "npx",
      "args": [
        "-y",
        "jmap-email"
      ]
    }
  }
}

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

Related MCP Server Comparisons