Emailens MCP Server (Official): Install & Setup

Install Emailens in Claude Code

Remote URL

Claude Code

claude mcp add --transport http emailens https://emailens.dev/api/mcp

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

{
  "mcpServers": {
    "emailens": {
      "url": "https://emailens.dev/api/mcp"
    }
  }
}

npm

Claude Code

claude mcp add emailens -- npx -y @emailens/mcp

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

{
  "mcpServers": {
    "emailens": {
      "command": "npx",
      "args": [
        "-y",
        "@emailens/mcp"
      ]
    }
  }
}

Frequently asked questions

What does the Emailens MCP server do?

Lint HTML email with Emailens: rendering issues in Gmail, Outlook, Apple Mail and more, per-client CSS compatibility scores, dark mode simulation and fixes.

Is the Emailens 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 Emailens run locally or remotely?

Local + Remote. Can run locally or be used as a hosted remote server.

How do I add Emailens to Claude Code?

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

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