Integrations

MCP Integration

LDM provides an MCP server so you can send email directly from Claude, Cursor, Continue, and other MCP-compatible tools.

What is MCP?

MCP (Model Context Protocol) is an open standard by Anthropic that lets AI applications connect to external tools and data sources through a unified interface. Think of it as a USB-C port for AI — one protocol, many tools.

MCP Documentation MCP GitHub

Installation

Install the LDM MCP server globally:

npm install -g @ldm/mcp-server

Claude Desktop setup

Add LDM to your Claude Desktop configuration. Edit claude_desktop_config.json:

{
  "mcpServers": {
    "ldm": {
      "command": "npx",
      "args": ["-y", "@ldm/mcp-server"],
      "env": {
        "LDM_API_KEY": "ldm_live_sk_abc123..."
      }
    }
  }
}

Restart Claude Desktop after saving. The LDM tools will appear automatically.

Cursor / Continue setup

For Cursor, Continue, or other MCP-compatible editors, add to your MCP configuration:

{
  "mcpServers": {
    "ldm": {
      "command": "npx",
      "args": ["-y", "@ldm/mcp-server"],
      "env": {
        "LDM_API_KEY": "ldm_live_sk_abc123..."
      }
    }
  }
}

Available tools

The LDM MCP server exposes the following tools:

Tool	Description
`ldm.send_message`	Send an email message with inbox verification.
`ldm.check_delivery`	Check the delivery status of a sent message.
`ldm.list_creatives`	List your creatives and their moderation status.
`ldm.get_replies`	Retrieve replies received for your messages.

Example usage in Claude

Once configured, you can ask Claude to send messages directly:

“Send an email to cto@acme.com introducing our infrastructure monitoring tool and ask if they'd like a demo.”

Claude will use the ldm.send_message tool to compose and send the email, then report the message ID and delivery status.

Security note

Always pass your API key via the LDM_API_KEY environment variable. Never hardcode your key in configuration files or commit it to version control. Use a .env file or your system's secret manager.