Lumail vs Proton Workflow Connector

In-depth architectural comparison of the Lumail and Proton Workflow Connector 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.

Which MCP Server Should You Choose?

Choose Lumail when:

• You need dedicated capabilities in the Communication domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore Lumail Details

Choose Proton Workflow Connector when:

• You need dedicated capabilities in the Communication domain.
• You prefer local stdio subprocess transport architecture.
• Your security boundary fits: No auth required (Free / Open Source).

Explore Proton Workflow Connector Details

Feature & Specification Comparison

Specification	Lumail Communication	Proton Workflow Connector Communication
Summary	Official Lumail email marketing MCP for campaigns, subscribers, and workflows.	Unofficial self-hosted MCP connector for Proton Mail Bridge and SimpleLogin.
Category & Scope	Communication	Communication
Quality signal

Tools & Capabilities Breakdown

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).

{
  "mcpServers": {
    "lumail": {
      "command": "npx",
      "args": [
        "-y",
        "lumail"
      ]
    }
  }
}

{
  "mcpServers": {
    "proton-workflow-connector": {
      "command": "npx",
      "args": [
        "-y",
        "proton-workflow-connector"
      ]
    }
  }
}

Related MCP Server Comparisons