MCP serverOfficial registry

3LT Letter Mail

Give AI assistants hands: send real USPS letters via MCP.

by com.3lgrouptechnologyv1.0.0GitHub

Power your agent

Add this server

The publisher's own URL. Not a PlugMCP endpoint.

Server URL

https://3lgrouptechnology.com/mcp

Provider

Claude Code

claude mcp add --transport http com.3lgrouptechnology-3lt-letter-mail https://3lgrouptechnology.com/mcp

Run in a terminal.

Claude Desktop

{
  "mcpServers": {
    "com.3lgrouptechnology-3lt-letter-mail": {
      "command": "npx",
      "args": [
        "-y",
        "mcp-remote",
        "https://3lgrouptechnology.com/mcp"
      ]
    }
  }
}

claude_desktop_config.json

Step-by-step: add this in Claude

Remote URL or a command on your machine? How the two installs differ

Run on PlugMCP

Host a copy with our keys and logs.

A new server you create. It is not this listing's official endpoint. Use the publisher install when you want their URL and their credentials.

Launch

Related MCP

3LT Letter Mail

Add this server

Host a copy with our keys and logs.

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