What is the key difference between MCP Zmq and Courier?

MCP Zmq belongs to the Communication category with local stdio execution, while Courier belongs to the Communication category with local stdio execution.

How do I install MCP Zmq or Courier 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 MCP Zmq and Courier free or paid?

MCP Zmq operates under a Free / Open Source model (No auth required). Courier operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

MCP Zmq lists 0 tools with 0 views and 0 GitHub stars. Courier lists 0 tools with 2 views and 0 GitHub stars.

Can I use both MCP Zmq and Courier 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

MCP Zmq vs Courier

In-depth architectural comparison of the MCP Zmq and Courier 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

MCP Zmq

Communication · Local stdio

Quality: 32/100 (Emerging) | Auth: No auth required

Courier

Communication · Local stdio

Quality: 40/100 (Fair) | Auth: No auth required

Verdict Summary: Choose MCP Zmq if you need specialized Communication tools running via a local process. Choose Courier 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 MCP Zmq 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 MCP Zmq Details

Choose Courier 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 Courier Details

Feature & Specification Comparison

Specification	MCP Zmq Communication	Courier Communication
Summary	MCP server for ZMQ messaging	Continuity protocol for autonomous AI agents. Agent messaging with SMTP bridge and LN payments.
Category & Scope	Communication	Communication
Quality signal

Tools & Capabilities Breakdown

MCP Zmq Tools (0)

No explicit tool names declared in metadata yet. Check project README on main listing page.

Courier Tools (0)

No explicit tool names declared in metadata yet. Check project README on main listing page.

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).

MCP Zmq Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "mcp-zmq": {
      "command": "uvx",
      "args": [
        "mcp-zmq"
      ]
    }
  }
}

Courier Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "courier": {
      "command": "npx",
      "args": [
        "-y",
        "courier-mcp"
      ]
    }
  }
}

Frequently Asked Questions

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

More alternatives to MCP Zmq More alternatives to Courier Communication category hub Canonical compare URL