Proton Workflow Connector

Overview

Proton Workflow Connector is an unofficial self-hosted MCP server that integrates Proton Mail Bridge and SimpleLogin with AI assistants. Instead of manual copy-pasting between applications, Claude and other AI tools can call Proton Workflow Connector as a set of native capabilities, automating email and alias management within your workflow.

The server runs locally on your machine via the uvx command uvx proton-workflow-connector, communicating over stdio using the Model Context Protocol. Setup requires three environment variables: PROTON_BRIDGE_USERNAME, PROTON_BRIDGE_PASSWORD, and PROTON_BRIDGE_EMAIL to authenticate with your Proton account. The current release is v1.3.0, distributed under the MIT license with source code available at NtrpyDev/proton-workflow-connector on GitHub.

Proton Workflow Connector appears in the Development category on mcp.site and works with MCP clients including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf, and Zed. If you maintain this server, claim your listing to verify ownership and keep information up to date.

Installation

// claude_desktop_config.json
{
  "mcpServers": {
    "proton_workflow_connector": {
      "command": "uvx",
      "args": [
        "proton-workflow-connector"
      ],
      "env": {
        "PROTON_BRIDGE_USERNAME": "<proton-bridge-username>",
        "PROTON_BRIDGE_PASSWORD": "<proton-bridge-password>",
        "PROTON_BRIDGE_EMAIL": "<proton-bridge-email>"
      }
    }
  }
}

Requires PROTON_BRIDGE_USERNAME, PROTON_BRIDGE_PASSWORD, PROTON_BRIDGE_EMAIL