Your Unreal editor, on command.
300+ Unreal tools over a local MCP server, running beside your editor. Use the built-in assistant, or the agent you already have.
Windows will show a SmartScreen notice because this installer is not code-signed yet. Choose More info, then Run anyway.
- Install
One installer. The assistant, the local MCP server and the plugin installer come together.
- Sign in
Your free account, or the one you already use on the web tools.
- Pick a .uproject
The matching prebuilt CosindraMCP plugin lands in your project. No compiler.
- Editor connected
Launch from the app. The Output Log confirms it:
CosindraMCP: Connected to MCP Server!
What is in the download
Three parts, one installer. The MCP server in the middle is what makes the tools available to any agent, not only ours.
Built-in assistant
runs on Cosindra credits
Describe a change in plain language. It inspects your scene, calls the tools and shows you what it did. Screenshots of the editor included.
Local MCP server
300+ Unreal tools, on your machine
Every tool the assistant uses is exposed over MCP. Run your own coding agent inside the app with your own account, or connect from your IDE with the extension.
Agents you can bring
- Claude Code
- Codex
- Gemini CLI
- Cursor agent
- GitHub Copilot
CosindraMCP plugin
prebuilt for UE 5.7–5.8
Placed in your project automatically, matched to its engine version. No compiler, no rebuild. It is the hands inside the editor.
Prefer to stay in your editor?
The Cosindra extension for VS Code and Cursor runs the same local MCP server and installs the same plugin. Copilot, Cursor’s agent, Claude Code or Codex get the Unreal tools from there. Free to install; no desktop app needed.
Before you run it
Windows shows a SmartScreen notice
The installer is not code-signed yet, so Windows warns about a publisher it has not seen. Choose More info, then Run anyway. Installers are only served from cosindra.ai, and signing is on the way.
macOS opens it straight away
Signed with an Apple Developer ID and notarized by Apple. Native for Apple Silicon; there is no Intel build.
Updates take care of themselves
The app downloads updates in the background and applies them on the next start. What each version brought is in the changelog.
- Windows
- 10 or newer
- macOS
- 12 or newer, Apple Silicon
- Unreal Engine
- 5.7–5.8
- Memory
- 8 GB
- Disk
- 500 MB
- Internet
- for the AI models
Questions before you install
Is Cosindra free to download?
Yes. The desktop app is a free download, and every account starts on a free tier with monthly credits. Paid plans add more credits and features; see the pricing page for details.
Why does Windows show a "Windows protected your PC" (SmartScreen) notice?
The Windows installer is not yet code-signed, so SmartScreen shows its standard caution for new publishers. The installer is only ever served from cosindra.ai. To proceed, click More info, then Run anyway. macOS builds are signed with an Apple Developer ID and notarized by Apple, so no equivalent warning appears there.
Which Unreal Engine versions are supported?
Unreal Engine 5.7–5.8. When you select a project, the app detects its engine version and injects the matching CosindraMCP plugin automatically. No manual plugin install.
Does it run on Apple Silicon Macs?
Yes. The macOS build is native for Apple Silicon and requires macOS 12 or newer. There is no Intel build.
Can I use my own AI account instead of Cosindra credits?
Yes, inside the desktop app. Install Claude Code, Codex, Gemini CLI or Cursor’s agent from the app’s settings; they reach the Unreal tools through the local MCP server on your own subscription or API key. This needs the BYOK plan, with a 10-day trial on Starter. Web products always use Cosindra credits.
Do I need the desktop app to use the web tools?
No. BlueprintStudio, WorldWeaver, MaterialForge, RigMaster and LaunchKit all run in the browser. The desktop app is what applies generated results into your open Unreal editor and hosts the full AI assistant.
Is there a VS Code or Cursor extension?
Yes. The Cosindra extension installs from the Visual Studio Marketplace (VS Code) or Open VSX (Cursor) and lets the AI agent you already use drive your open editor with the same 300+ tools. See the extensions page for set-up per editor.
Do I need the desktop app if I use the extension?
No. The extension runs the same local server the desktop app runs and installs the same plugin. If you use both, they share one server and one editor session.
How do updates work?
The app checks for updates automatically, downloads them in the background, and applies them on the next restart. The changelog lists what each version brought.
Full version history in the changelog. Plans on the pricing page.