proton-workflow-connector MCP Server
API key requiredUnofficial self-hosted MCP connector for Proton Mail Bridge and SimpleLogin.
To add proton-workflow-connector to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It needs 4 environment variables, listed below.
Install
uvx proton-workflow-connector@1.3.0Environment variables
PROTON_BRIDGE_USERNAMESet in your MCP configPROTON_BRIDGE_PASSWORDSet in your MCP configPROTON_BRIDGE_EMAILSet in your MCP configSIMPLELOGIN_API_KEYSet in your MCP configInstall with your client
claude mcp add proton-workflow-connector --env PROTON_BRIDGE_USERNAME=<YOUR_PROTON_BRIDGE_USERNAME> --env PROTON_BRIDGE_PASSWORD=<YOUR_PROTON_BRIDGE_PASSWORD> --env PROTON_BRIDGE_EMAIL=<YOUR_PROTON_BRIDGE_EMAIL> --env SIMPLELOGIN_API_KEY=<YOUR_SIMPLELOGIN_API_KEY> -- uvx proton-workflow-connector@1.3.0
Run this in a terminal to add the server to Claude Code.
What this does
proton-workflow-connector exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.
Requirements
This server needs the following environment variables to be set before it can run:
PROTON_BRIDGE_USERNAME PROTON_BRIDGE_PASSWORD PROTON_BRIDGE_EMAIL SIMPLELOGIN_API_KEY
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install proton-workflow-connector?
Run the Claude Code command in the install section to add proton-workflow-connector to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.
Which clients work with proton-workflow-connector?
This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to proton-workflow-connector as well.
Does proton-workflow-connector need an API key?
Yes. Before it can run, set these environment variables: PROTON_BRIDGE_USERNAME, PROTON_BRIDGE_PASSWORD, PROTON_BRIDGE_EMAIL, SIMPLELOGIN_API_KEY. They go in the env block of your MCP config.
Imported from the Official MCP Registry. The details above come from the registry entry; the maker can claim this listing to correct them, add docs, and see its traffic.
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