LocalFree server, account needed

Proton Mail MCP server

Alexendros/proton-mail-mcp

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

Source code

Install Proton Mail in Claude Code

Claude Code
claude mcp add proton-mail -e PROTON_USERNAME=... -e PROTON_PASSWORD=... -- npx -y @alexendros/proton-mail-mcp
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "proton-mail": {
      "command": "npx",
      "args": [
        "-y",
        "@alexendros/proton-mail-mcp"
      ],
      "env": {
        "PROTON_USERNAME": "...",
        "PROTON_PASSWORD": "..."
      }
    }
  }
}

Replace each ... with your own value.

Frequently asked questions

What does the Proton Mail MCP server do?

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

Is the Proton Mail 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 Proton Mail run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add Proton Mail to Claude Code?

Run: claude mcp add proton-mail -e PROTON_USERNAME=... -e PROTON_PASSWORD=... -- npx -y @alexendros/proton-mail-mcp

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