**Requirements:** Admin role. Go into **Settings → MCP servers**. The tab has two blocks, in this order: 1. **"MCP servers"**, at the very top — where you register your own server (Custom) and see the ones you already have registered, with their tools, their connection status and the button to edit or delete them. Full procedure: Manual 26, section 8. 2. **"MCP server catalog"**, below — the rest of this manual. The screen's real subtitle: "Preconfigured third-party servers: pick one, connect your key, and enable only the tools you need." The catalog's two filters combine with each other (you search "Category: CRM and sales" + "Level: Official · Key" and you only see what satisfies both at once). The 13 categories are the same ones the Integrations screen already uses: CRM and sales, Email and marketing, Calendar and appointments, Payments and signing, Support, Stores and catalogs, Telephony, Portals and bookings, Productivity, Data, Development, Messaging and Other.