CheckMX MCP Server: Install & Setup

Install CheckMX in Claude Code

Claude Code

claude mcp add --transport http checkmx https://checkmx.dev/mcp

mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)

{
  "mcpServers": {
    "checkmx": {
      "url": "https://checkmx.dev/mcp"
    }
  }
}

Frequently asked questions

What does the CheckMX MCP server do?

Verify emails and review cold email campaigns, mailboxes, replies and deliverability in CheckMX.

Is the CheckMX MCP server free?

The server is free, but you will likely need an account. The server itself is free, but it connects to a service that needs an account or API key, which may have paid tiers. Check the provider for current pricing.

Does CheckMX run locally or remotely?

Remote. Hosted by the provider. You connect with a URL, nothing to install.

How do I add CheckMX to Claude Code?

Run: claude mcp add --transport http checkmx https://checkmx.dev/mcp

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