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

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

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

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

Which MCP server has more tools and community activity?

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

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

Mailbox is listed under a Free / Open Source model with No auth required . SMSPM MCP Server 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 Mailbox and SMSPM MCP Server at the same time in my AI client?

Yes! MCP clients support multi-server orchestration. You can include both mailbox and smspm-mcp-server 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, Mailbox has a Quality Score of 42 /100 ( Fair ) with 0 views, 0 installs, and 0 GitHub stars. SMSPM MCP Server holds a Quality Score of 25 /100 ( Emerging ) with 0 views, 0 installs, and 0 GitHub stars.

Side-by-Side Model Context Protocol Comparison

Mailbox vs SMSPM MCP Server

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

Mailbox

Developer Tools · Remote HTTP/SSE

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

SMSPM MCP Server

Developer Tools · Local stdio

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

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

Which MCP Server Should You Choose?

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

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

Feature & Specification Comparison

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

Tools & Capabilities Breakdown

Mailbox Tools (0)

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

SMSPM MCP Server 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).

Mailbox Configuration

mcpServers (Claude Desktop / Cursor)

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

SMSPM MCP Server Configuration

mcpServers (Claude Desktop / Cursor)

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

Frequently Asked Questions

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

More alternatives to Mailbox More alternatives to SMSPM MCP Server Developer Tools category hub

Related MCP Server Comparisons

Popular comparisons with Mailbox

Popular comparisons with SMSPM MCP Server

G
SMSPM MCP Server vs Graphql