Roundcube MCP Server by RoundcubePlus

    Included in the Ultimate Pack

    RoundcubePlus MCP Server

    Connect your Roundcube mailbox to Claude and ChatGPT and other AI assistants with the RoundcubePlus (Model Context Protocol) MCP Server.

    Standard Roundcube does not include MCP support. This plugin adds it.

    MCP Plugin Upgrade to Ultimate

    AI assistant · connected to Roundcube
    Find this week's invoices and summarize them.
    Searching mailbox · 4 messages found
    Summarize emails from John Smith last week
    I found 4 invoices from last week. Here's a summary of each, with download links. Want me to draft a forward to accounting?

    Illustrative example

    How it works

    Set up once. After that, users work with their mailbox from their AI app.

    Step 1

    Install the plugin

    Download and install the plugin on your Roundcube server.

    Step 2

    Connect an AI app

    Add your Roundcube link to your favorite AI, sign in and approve permissions.

    Step 3

    Manage email from Claude or ChatGPT

    "Summarize unread mail from this client and draft a reply."

    26 tools for mail, folders and contacts

    Each group needs its own permission, which the user approves when connecting. Other RoundcubePlus plugins can add tools to the same server.

    Messages

    Search, read and follow email threads.

    mail.read

    Attachments

    Read text files or get a download link.

    mail.read

    Drafts and sending

    Drafts replies and forwards, send with permission.

    mail.write · mail.send

    Message management

    Move messages, flags and mark read or unread, send to Trash.

    mail.write

    Folders

    List, create, rename and move folders.

    folders.write

    Contacts

    Find, add, edit and delete contacts.

    contacts.read · contacts.write

    Requirements

    Runs inside your existing Roundcube. No separate MCP server to host.

    Roundcube
    1.6 or 1.7
    PHP
    8.0 or higher, with the cURL extension
    Database
    MySQL, PostgreSQL or SQLite
    Transport and auth
    Streamable HTTP · OAuth 2.1 with PKCE
    AI clients
    Ai clients: MCP protocol 2026-07-28, (e.g Claude and ChatGPT)

    How do I get the Roundcube MCP Server?

    The MCP plugin is included in the RoundcubePlus Ultimate Pack.

    Already on Ultimate

    Included at no extra cost. Download the plugin from your account and install it on your Roundcube server.

    Download the plugin

    Upgrade to Ultimate

    Get the MCP Server plus every RoundcubePlus skin and plugin in the pack.

    Upgrade to Ultimate

    Frequently Asked Questions

    Have questions? We have answers.

    Does Roundcube support MCP natively?
    No. Standard Roundcube has no MCP server. The RoundcubePlus MCP plugin adds it.
    Does it work with cPanel, Plesk or DirectAdmin Roundcube installs?
    The default cPanel Roundcube is not supported, because its URL isn't static. Plesk and DirectAdmin haven't been confirmed yet.
    Who pays for AI usage?
    Each end user uses their own Claude, ChatGPT or other AI subscription. The provider pays no AI costs.
    Can the AI access other users' mailboxes?
    No. Each connection is limited to the mailbox of the user who authorized it.
    Can users disconnect an AI app?
    Yes. Under Settings › AI Integrations › Connected apps, users can remove one app or all of them, or turn AI access off entirely.
    Is it included in the Ultimate Pack?
    Yes, at no extra cost for existing Ultimate customers.

    Setup guides and troubleshooting are in the Knowledge Base.