What is the key difference between Ox MCP and Spix MCP?

Ox MCP belongs to the Communication category with local stdio execution, while Spix MCP belongs to the Communication category with local stdio execution.

How do I install Ox MCP or Spix MCP 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 Ox MCP and Spix MCP free or paid?

Ox MCP operates under a Free / Open Source model (other). Spix MCP operates under a Freemium model (API Key required).

Which MCP server has more tools and community activity?

Ox MCP lists 27 tools with 3 views and 0 GitHub stars. Spix MCP lists 6 tools with 4 views and 1 GitHub stars.

Can I use both Ox MCP and Spix MCP 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

Ox MCP vs Spix MCP

In-depth architectural comparison of the Ox MCP and Spix MCP 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

Ox MCP

Communication · Local stdio

Quality: 53/100 (Good) | Auth: other

Spix MCP

Communication · Local stdio

Quality: 48/100 (Fair) | Auth: API Key required

Verdict Summary: Choose Ox MCP if you need specialized Communication tools running via a local process. Choose Spix MCP if your workspace requires Communication integration with local subprocess execution. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Ox MCP when:

You need dedicated capabilities in the Communication domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: other (Free / Open Source).
You have access to required keys: OX_MCP_MAIL_SERVER, OX_MCP_MAIL_USER, OX_MCP_MAIL_APP_PASSWORD, OX_MCP_CALDAV_SERVER, OX_MCP_CALDAV_USER, OX_MCP_CALDAV_APP_PASSWORD, OX_MCP_CARDDAV_SERVER, OX_MCP_CARDDAV_USER.
Primary tools included: list_servers, server, email_search.

Explore Ox MCP Details

Choose Spix MCP when:

You need dedicated capabilities in the Communication domain.
You prefer local stdio subprocess transport architecture.
Your security boundary fits: API Key required (Freemium).
You have access to required keys: SPIX_API_KEY.
Primary tools included: .

Feature & Specification Comparison

Specification	Ox MCP Rheopyrin Communication	Spix MCP Spix-HQ Communication
Summary	Email (IMAP/SMTP), mail filters (Sieve), calendar (CalDAV), contacts (CardDAV), and free/busy scheduling for Open-Xchange and standards-based mail platforms. Published on the official MCP Registry.	Give AI agents a real phone number and voice. Make outbound calls, handle inbound calls, send email, and manage contacts via 26 MCP tools. 500ms voice latency (Deepgram Nova-3 + Claude + Cartesia Sonic-3). Install: pip install spix-mcp. Free tier available.
Category & Scope

Tools & Capabilities Breakdown

Ox MCP Tools (27)

list_servers

server

email_search

folder

ox-api

body

text

email_mark_spam

email_archive

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).

Ox MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "rheopyrin-ox-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@rheopyrin/ox-mcp"
      ],
      "env": {
        "OX_MCP_MAIL_SERVER": "YOUR_OX_MCP_MAIL_SERVER_HERE",
        "OX_MCP_MAIL_USER": "YOUR_OX_MCP_MAIL_USER_HERE",
        "OX_MCP_MAIL_APP_PASSWORD": "YOUR_OX_MCP_MAIL_APP_PASSWORD_HERE",
        "OX_MCP_CALDAV_SERVER": "YOUR_OX_MCP_CALDAV_SERVER_HERE",
        "OX_MCP_CALDAV_USER": "YOUR_OX_MCP_CALDAV_USER_HERE",
        "OX_MCP_CALDAV_APP_PASSWORD": "YOUR_OX_MCP_CALDAV_APP_PASSWORD_HERE",
        "OX_MCP_CARDDAV_SERVER": "YOUR_OX_MCP_CARDDAV_SERVER_HERE",
        "OX_MCP_CARDDAV_USER": "YOUR_OX_MCP_CARDDAV_USER_HERE"
      }
    }
  }
}

Spix MCP Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "spix-hq-spix-mcp": {
      "command": "uvx",
      "args": [
        "spix-mcp"
      ],
      "env": {
        "SPIX_API_KEY": "YOUR_SPIX_API_KEY_HERE"
      }
    }
  }
}

Frequently Asked Questions

Ox MCP is categorized under Communication and uses a local stdio subprocess. In contrast, Spix MCP belongs to Communication using local stdio subprocess. Select Ox MCP when you need capabilities focused on communication and Spix MCP when you require tools for communication.

More alternatives to Ox MCP More alternatives to Spix MCP Communication category hub