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mcp/harbor
Grok

Duobox for Grok

io.duobox/mail

Business email on your domain for AI agents: read, draft and send with the permissions you choose.

client:Grok transport:streamable-http

Install Duobox in Grok

.mcp.json (in your project root) 

{
  "mcpServers": {
    "mail": {
      "type": "http",
      "url": "https://mcp.duobox.io/v1/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

Duobox in other clients

Duobox MCP server