SuperMailbox for Grok
io.github.hardtab/supermailbox
Gmail, iCloud, Outlook, Yahoo, Fastmail and IMAP email: search, read, draft and organize.
client:Grok
transport:streamable-http
Install SuperMailbox in Grok
.mcp.json (in your project root)
{
"mcpServers": {
"supermailbox": {
"type": "http",
"url": "https://api.supermailbox.app/mcp"
}
}
}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