Cosindra for Unreal Engine

Drive your open Unreal Engine editor from the agent you already use. 328 editor tools over the Model Context Protocol, installed from your editor’s marketplace, running entirely on your machine.

Version 0.1.1 · Windows x64 and Apple Silicon macOS · Unreal Engine 5.7 to 5.8 · Free to install

Pick your editor

The same extension, two stores. Each page walks through install, sign-in, project set-up and how that editor’s agent gets the tools.

Cosindra for VS Code

Copilot agent mode gets the Unreal tools automatically; Claude Code and Codex in one command.

Visual Studio Marketplace · publisher cosindra

Set-up guide →

Cosindra for Cursor

One-click MCP install for Cursor's agent; Claude Code and Codex in one command.

Open VSX Registry · namespace cosindra · also in Cursor's Extensions search

Set-up guide →

Desktop app or extension?

Both drive the same plugin through the same local server. The difference is where you type.

	Desktop app	IDE extension
Where you work	Cosindra's own chat window	Your editor's agent panel or a terminal agent
AI models	Built-in models, or your own keys on BYOK	Whatever your agent already uses
Unreal plugin	Installed for you	Installed for you
Local server	Started by the app	Started by the extension
Both at once	Shares one server and one editor session	Shares one server and one editor session
Price	Free app; plans add credits	Free extension; external agents need a plan or the trial

Want the chat window instead? Download the desktop app

What your agent can do in the editor

The tools are the same 328 the desktop app uses: spawning and configuring actors, building and compiling Blueprint graphs, materials and material instances, Enhanced Input, UMG widgets, animation set-up, Play-In-Editor control and Output Log reading. Every call executes live in your open editor, and the result is visible immediately.

Browse the full tool reference →

Extension FAQ

Which editors are supported?

VS Code (from the Visual Studio Marketplace) and Cursor (from Open VSX), on Windows x64 and Apple Silicon macOS. Other editors that install from Open VSX, such as Windsurf and VSCodium, can install it too.

Which AI agents can use it?

The editor's own agent: GitHub Copilot agent mode in VS Code, Cursor's agent in Cursor. Plus terminal agents: Claude Code and Codex, connected with one command from the panel.

Do I need the desktop app?

No. The extension is a standalone client of the same local server. If you use both, they share one server and one editor session.

What happens on my machine?

The extension downloads a small local server into the Cosindra data folder, installs the prebuilt CosindraMCP plugin into your project's Plugins folder, and registers the server with your editor. Your project's contents never leave the machine. The server reports aggregate tool-call counts to your account for plan limits, and the extension reports a few set-up and failure events (versions, operating system, error code) following your editor's telemetry setting, never file paths, prompts or project contents.

Is it free?

Installing the extension is free. Driving Unreal from an external AI agent needs a paid plan or the ten-day trial that every new account gets without a card.

Which Unreal Engine versions?

Unreal Engine 5.7 and 5.8. The plugin is prebuilt per engine version, so Blueprint-only projects work as-is and C++ projects build without touching the plugin.

Set-up details and troubleshooting

The docs page covers where files go, how each agent connects, and what to send us if something does not work.