Proton Mail (unofficial) for Grok

io.github.sethbang/proton-mail-mcp

Unofficial Proton Mail MCP — send, read, search & organize email over SMTP and IMAP

client:Grok transport:stdio runtime:npm

Install Proton Mail (unofficial) in Grok

.mcp.json (in your project root)

PROTONMAIL_USERNAME

PROTONMAIL_PASSWORD

PROTONMAIL_HOST

PROTONMAIL_PORT

PROTONMAIL_SECURE

IMAP_HOST

IMAP_PORT

IMAP_SECURE

IMAP_USERNAME

IMAP_PASSWORD

READONLY

RESTRICT_OUTBOUND_TO_SELF

ALLOW_FILE_DOWNLOAD_DIR

ALLOW_EMPTY_FOLDER

DEBUG

Held in this page only — never stored, logged, or sent anywhere but back to your screen.

{
  "mcpServers": {
    "proton-mail-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "proton-mail-mcp"
      ],
      "env": {
        "PROTONMAIL_USERNAME": "<PROTONMAIL_USERNAME>",
        "PROTONMAIL_PASSWORD": "<PROTONMAIL_PASSWORD>",
        "PROTONMAIL_HOST": "<PROTONMAIL_HOST>",
        "PROTONMAIL_PORT": "<PROTONMAIL_PORT>",
        "PROTONMAIL_SECURE": "<PROTONMAIL_SECURE>",
        "IMAP_HOST": "<IMAP_HOST>",
        "IMAP_PORT": "<IMAP_PORT>",
        "IMAP_SECURE": "<IMAP_SECURE>",
        "IMAP_USERNAME": "<IMAP_USERNAME>",
        "IMAP_PASSWORD": "<IMAP_PASSWORD>",
        "READONLY": "<READONLY>",
        "RESTRICT_OUTBOUND_TO_SELF": "<RESTRICT_OUTBOUND_TO_SELF>",
        "ALLOW_FILE_DOWNLOAD_DIR": "<ALLOW_FILE_DOWNLOAD_DIR>",
        "ALLOW_EMPTY_FOLDER": "<ALLOW_EMPTY_FOLDER>",
        "DEBUG": "<DEBUG>"
      }
    }
  }
}

Grok Build reads Claude Code's .mcp.json and Claude Desktop's config unchanged, so a server you have already set up there needs nothing new. The Grok web app and X integration do not take custom servers. Grok docs

Proton Mail (unofficial) in other clients

Proton Mail (unofficial) MCP server