Proton Mail MCP Server

by alexendrosio.github.Alexendros/proton-mail-mcpv0.1.2

Proton Mail MCP via Bridge (IMAP/SMTP) · 13 tools · dual transport stdio + HTTP.

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Active10d ago

Install Proton Mail MCP server

claude mcp add proton-mail-alexendros -e PROTON_USERNAME='<proton-username>' -e PROTON_PASSWORD='<proton-password>' -- npx -y @alexendros/proton-mail-mcp

{
  "mcpServers": {
    "proton-mail-alexendros": {
      "command": "npx",
      "args": [
        "-y",
        "@alexendros/proton-mail-mcp"
      ],
      "env": {
        "PROTON_USERNAME": "<proton-username>",
        "PROTON_PASSWORD": "<proton-password>"
      }
    }
  }
}

Add to ~/.cursor/mcp.json (global) or .cursor/mcp.json (project).

{
  "mcpServers": {
    "proton-mail-alexendros": {
      "command": "npx",
      "args": [
        "-y",
        "@alexendros/proton-mail-mcp"
      ],
      "env": {
        "PROTON_USERNAME": "<proton-username>",
        "PROTON_PASSWORD": "<proton-password>"
      }
    }
  }
}

Settings → Developer → Edit Config (claude_desktop_config.json), then restart.

{
  "servers": {
    "proton-mail-alexendros": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@alexendros/proton-mail-mcp"
      ],
      "env": {
        "PROTON_USERNAME": "<proton-username>",
        "PROTON_PASSWORD": "<proton-password>"
      }
    }
  }
}

Add to .vscode/mcp.json in your workspace.

{
  "mcpServers": {
    "proton-mail-alexendros": {
      "command": "npx",
      "args": [
        "-y",
        "@alexendros/proton-mail-mcp"
      ],
      "env": {
        "PROTON_USERNAME": "<proton-username>",
        "PROTON_PASSWORD": "<proton-password>"
      }
    }
  }
}

Add to ~/.codeium/windsurf/mcp_config.json.

Configuration

Variable	Required	Secret	Description
PROTON_BRIDGE_HOST	—	—	Hostname or IP of the Proton Mail Bridge (default: 127.0.0.1 for local, or container hostname in compose).
PROTON_IMAP_PORT	—	—	IMAP port exposed by Proton Mail Bridge (default: 1143).
PROTON_SMTP_PORT	—	—	SMTP port exposed by Proton Mail Bridge (default: 1025).
PROTON_USERNAME	yes	—	Bridge username (your Proton Mail address).
PROTON_PASSWORD	yes	yes	Bridge-generated app password (NOT your Proton account password).

Freshness

Active — last maintenance signal 10d ago. The newest of the signals below sets the band.

Last commit (default branch)
2026-09-29 · 10d ago · GitHub
Latest release
2026-09-25 · 15d ago · GitHub · v1.6.0
Package published
no data · npm/PyPI
Registry entry updated
2026-05-02 · 5mo ago · official registry · v0.1.2

FAQ

›How do I install the Proton Mail MCP server in Claude Code?

Run: claude mcp add proton-mail-alexendros -e PROTON_USERNAME='<proton-username>' -e PROTON_PASSWORD='<proton-password>' -- npx -y @alexendros/proton-mail-mcp. For Cursor, VS Code, Claude Desktop and Windsurf, use the install tabs above.

›Does Proton Mail require an API key?

Yes. It expects PROTON_USERNAME, PROTON_PASSWORD, of which 1 is a secret.

›Can I use Proton Mail as a remote (hosted) MCP server?

No hosted endpoint is published; it runs locally over stdio.

›Is Proton Mail in the official MCP registry?

Yes, as io.github.Alexendros/proton-mail-mcp.