Meet Plumby.

The tool that turns your everyday AI agent into a UEFN beast.

Get access Watch the demo
Features

What Plumby adds to your agent.

The editor connection gives an AI agent the tools. Plumby gives it the know-how: build pipelines, quality checks and guard rails, so it ships finished work instead of first drafts.

01

Build

From a reference to a finished asset.

UI from a screenshot

Paste a mock-up and get a working UMG widget, laid out 1:1, with its Verse bindings already wired.

UMG · MVVM · Verse fields

Materials from a reference

Show the look you want and get a tidy, labelled node graph plus instances you can tweak.

Node graph · Instances

3D models from a view sheet

Front and side views in, game-ready mesh out: modelled in Blender, scaled and imported with LODs.

Blender · FBX · LODs
02

Animate

Characters, crowds and effects.

Rig and animation

A skeleton, skin weights and a starter set of animations, imported and ready to drop into your island.

Skeleton · Skin · Clips

VAT crowds

Bake animations into vertex-animation textures and fill a scene with hundreds of moving characters.

VAT · WPO material

VFX templates

Niagara effects built from tested templates, tuned to stay inside Fortnite's performance budget.

Niagara
03

Get it right

It measures, then it fixes.

Measured against your reference

Renders what it built and scores shape and colour against your reference, so you see how close it is.

Silhouette IoU · Colour ΔE

Fixed until it matches

When a score falls short, it adjusts the asset and measures again, without you having to ask.

Measure → fix → repeat

Verse that compiles

Code is checked against your UEFN version's API before it builds, so you see fewer red errors.

API check · Build
04

Safe and fast

Built for long sessions.

Crash guard

Rules stop the editor calls known to crash UEFN before they run, updated for every release.

Rules per UEFN version

Batched edits

Hundreds of changes go in as one editor script instead of hundreds of slow tool calls.

Faster · fewer tokens

Picks up after a crash

Long jobs save their progress, so if the editor goes down they resume instead of starting over.

Resumable batches
  • UEFN knowledge base, refreshed each release
  • Private Discord with the video course
  • Works with Claude Code, Codex and Cursor
Watch the demo

Watch it build.

Pricing

Pick a plan. Build without limits.

3-Day Pass

For creators trying it out.

$19.99/ 3 days

Renews every 3 days · cancel anytime

Get 3-Day Pass
  • Full access to the MCP
  • Private Discord community
  • Individual license · 1 machine
  • Basic support

Monthly Most popular

For creators ready to grow.

$59.99/ month

Renews monthly · cancel anytime

Get Monthly
  • Full access to the MCP
  • Private Discord community
  • Individual license · 1 machine
  • Priority support
  • 1 call per week

Yearly Best value

For established creators.

$499.99/ year

Renews yearly · cancel anytime

Get Yearly
  • Full access to the MCP
  • Private Discord community
  • Individual license · 1 machine
  • Premium support
  • 3 calls per week
Studios & teams

Tailored to your needs.

Multi-seat licenses, dedicated support and onboarding for your studio.

Contact sales
Lifetime updates Secure checkout
FAQ

Questions, answered.

What is an MCP?
MCP (Model Context Protocol) is the standard way AI agents connect to external tools. Plumby is an MCP server that lets Claude Code, Codex or Cursor build inside UEFN.
What do I need?
Windows 10/11, UEFN with Python enabled, and Claude Code, Codex or Cursor on your own paid plan. Blender is only needed for modelling.
Does it work with Epic's official UEFN MCP?
Yes, they run side by side. Epic's MCP connects your agent to the editor, and Plumby adds the build pipelines on top.
Is it safe to use on my project?
Large changes run in crash-safe batches and imports are checked before they land. As with any editor tool, keep a backup or use version control.
What happens after I subscribe?
You get the installer and an invite to the private Discord, where a bot gives you the role that unlocks the course. After installing, run "plumby status" to confirm it is connected.
Do plans renew automatically?
Yes. Cancel anytime and keep access until the end of the period you paid for.
What happens when my plan ends?
Your access to the tools, the Discord and the course stops until you renew. Everything you built stays in your project.
How many computers can I use? Can my team share it?
Each license covers one person on one machine. For teams, contact sales for multi-seat licenses.
Not sure it fits your project?Book a free 20-minute call.
Book a call