What is the key difference between Mailbuttons and Marginal?

Mailbuttons belongs to the Communication category with local stdio execution, while Marginal belongs to the Communication category with cloud HTTP/SSE execution.

How do I install Mailbuttons or Marginal 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 Mailbuttons and Marginal free or paid?

Mailbuttons operates under a Free / Open Source model (No auth required). Marginal operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

Mailbuttons lists 0 tools with 1 views and 1 GitHub stars. Marginal lists 0 tools with 0 views and 0 GitHub stars.

Can I use both Mailbuttons and Marginal 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

Mailbuttons vs Marginal

In-depth architectural comparison of the Mailbuttons and Marginal 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

Mailbuttons

Communication · Local stdio

Quality: 44/100 (Fair) | Auth: No auth required

Marginal

Communication · Remote HTTP/SSE

Quality: 25/100 (Emerging) | Auth: No auth required

Verdict Summary: Choose Mailbuttons if you need specialized Communication tools running via a local process. Choose Marginal if your workspace requires Communication integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose Mailbuttons 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 Mailbuttons Details

Choose Marginal when:

You need dedicated capabilities in the Communication domain.
You prefer remote streaming HTTP/SSE transport architecture.
Your security boundary fits: No auth required (Free / Open Source).

Explore Marginal Details

Feature & Specification Comparison

Specification	Mailbuttons Communication	M Marginal Communication
Summary	Governed email for AI agents: sandbox inboxes, server-side policy gate, tamper-evident audit.	Email A/B tests for AI agents: subject lines, managed sends, open/click tracking, and results.
Category & Scope	Communication	Communication
Quality signal

Tools & Capabilities Breakdown

Mailbuttons Tools (0)

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

Marginal 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).

Mailbuttons Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "mailbuttons-2": {
      "command": "npx",
      "args": [
        "-y",
        "skills"
      ]
    }
  }
}

Marginal Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "marginal": {
      "url": "https://marginal.sh"
    }
  }
}

Frequently Asked Questions

Mailbuttons is categorized under Communication and uses a local stdio subprocess. In contrast, Marginal belongs to Communication using remote streaming HTTP/SSE transport. Select Mailbuttons when you need capabilities focused on communication and Marginal when you require tools for communication.

More alternatives to Mailbuttons More alternatives to Marginal Communication category hub