What is the key difference between SMSPM MCP Server and Mailbox?

SMSPM MCP Server belongs to the Developer Tools category with local stdio execution, while Mailbox belongs to the Developer Tools category with cloud HTTP/SSE execution.

How do I install SMSPM MCP Server or Mailbox 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 SMSPM MCP Server and Mailbox free or paid?

SMSPM MCP Server operates under a Free / Open Source model (No auth required). Mailbox operates under a Free / Open Source model (No auth required).

Which MCP server has more tools and community activity?

SMSPM MCP Server lists 0 tools with 0 views and 0 GitHub stars. Mailbox lists 0 tools with 0 views and 0 GitHub stars.

Can I use both SMSPM MCP Server and Mailbox 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.

How do I install SMSPM MCP Server or Mailbox in Claude Desktop, Cursor, or Windsurf?

Both servers follow the standard Model Context Protocol configuration format. Simply copy the JSON block from the configuration section above and paste it into your AI client's mcpServers configuration object (for instance in claude_desktop_config.json or ~/.cursor/mcp.json ), then completely restart or refresh the application.

Are SMSPM MCP Server and Mailbox free to use, or do they require API keys?

SMSPM MCP Server is listed under a Free / Open Source model with No auth required . Mailbox operates under a Free / Open Source model with No auth required . If environment variables are required (such as API keys), be sure to define them under the env key in your MCP client's configuration file.

Can I run both SMSPM MCP Server and Mailbox at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both smspm-mcp-server and mailbox as distinct keys inside the single mcpServers object in your configuration file. Your AI assistant will automatically select and call the appropriate tool from either server during chat sessions.

Which MCP server has higher directory engagement and quality ratings?

On AllMCPs, SMSPM MCP Server has a Quality Score of 25 /100 ( Emerging ) with 0 views, 0 installs, and 0 GitHub stars. Mailbox holds a Quality Score of 42 /100 ( Fair ) with 0 views, 0 installs, and 0 GitHub stars.

Side-by-Side Model Context Protocol Comparison

SMSPM MCP Server vs Mailbox

In-depth architectural comparison of the SMSPM MCP Server and Mailbox 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

SMSPM MCP Server

Developer Tools · Local stdio

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

Mailbox

Developer Tools · Remote HTTP/SSE

Quality: 42/100 (Fair) | Auth: No auth required

Verdict Summary: Choose SMSPM MCP Server if you need specialized Developer Tools tools running via a local process. Choose Mailbox if your workspace requires Developer Tools integration with remote web transport. Both servers can be configured concurrently in your client's mcpServers manifest.

Which MCP Server Should You Choose?

Choose SMSPM MCP Server when:

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

Explore SMSPM MCP Server Details

Choose Mailbox when:

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

Explore Mailbox Details

Feature & Specification Comparison

Specification	S SMSPM MCP Server Developer Tools	M Mailbox Developer Tools
Summary	Send SMS via the SMSPM API from any MCP client.	Physical mail API for AI agents. Send letters, certified mail, postcards from code via MCP.
Category & Scope	Developer Tools	Developer Tools
Quality signal

Tools & Capabilities Breakdown

SMSPM MCP Server Tools (0)

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

Mailbox 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).

SMSPM MCP Server Configuration

mcpServers (Claude Desktop / Cursor)

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

Mailbox Configuration

mcpServers (Claude Desktop / Cursor)

{
  "mcpServers": {
    "mailbox": {
      "url": "https://mailbox.bot/mcp-install"
    }
  }
}

Frequently Asked Questions

SMSPM MCP Server is categorized under Developer Tools and uses a local stdio subprocess. In contrast, Mailbox belongs to Developer Tools using remote streaming HTTP/SSE transport. Select SMSPM MCP Server when you need capabilities focused on developer tools and Mailbox when you require tools for developer tools.

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