UEFN-TOOLBELT

Start the HTTP listener so Claude Code can control UEFN directly

Stop the MCP HTTP listener

Restart the MCP HTTP listener (useful after hot-reload)

Print MCP listener status — port, running state, command count

Execute arbitrary Python inside the UEFN editor on the main thread.

Get the last N lines from the MCP listener's internal log ring.

Run any registered UEFN Toolbelt tool by name.

List all registered UEFN Toolbelt tools.

Get the full parameter schema for a single UEFN Toolbelt tool.

List all actors in the current UEFN level.

Get the actors currently selected in the UEFN viewport.

Spawn an actor in the current level.

Delete actors by path name or label.

Set an actor's transform (any combination of location, rotation, scale).

Set a single editor property on an actor.

Read specific editor properties from an actor.

List assets in a Content Browser directory.

Get detailed info (class, package, path) about an asset.

Get assets currently selected in the Content Browser.

Rename or move an asset.

Delete an asset permanently.

Duplicate an asset to a new path.

Check if an asset exists at the given path.

Save a modified asset to disk.

Import an external file (FBX, PNG, WAV, etc.) into the Content Browser.

Search for assets using the Asset Registry.

Create a new MaterialInstanceConstant from a parent material.

Execute multiple bridge commands in a single UEFN editor tick.

Undo the last action in the UEFN editor.

Redo the last undone action in the UEFN editor.

Get recent command history with per-command timing (elapsed_ms).

Save the current level to disk.

Get info about the current level: world name and actor count.

Get the current editor viewport camera location and rotation.

Move the editor viewport camera.

Search the authoritative Verse language spec for a keyword or concept.

Fetch a complete chapter from the Verse language spec by topic.

Pull the latest Verse spec from upstream (git pull on verse-book/).

Dump all internal properties of a selected Verse actor for discovery.

Return the most recent tool execution entries.

Return aggregate stats across all recorded tool calls this session.

Wipe the activity log buffer and the persisted JSON file.

Attach selected actors to the last selected actor as children.

Detach all selected actors from their current parent. Preserves world transforms.

Move all selected actors into a named World Outliner folder (created automatically).

Move all selected actors out of any World Outliner folder to the root level.

Rename a World Outliner folder by re-pathing every actor inside it.

Select all actors whose World Outliner folder exactly matches folder_name.

Select all actors in the same folder as the first currently selected actor.

Select all level actors whose class name contains the given filter string (case-insensitive).

List all World Outliner folders with actor counts. Root actors are listed under '(root)'.

Match transform components from the first selected actor to all others.

Hide all currently selected actors in the editor viewport.

Make the currently selected hidden actors visible again.

Hide all level actors except those currently selected. Workflow: select what you want to see → actor_isolate → work → actor_show_all.

Un-hide every actor in the level — the global 'get everything back' command.

Hide all actors whose World Outliner folder path starts with folder_name.

Restore visibility for all actors in a named World Outliner folder.

Lock selected actors so they cannot be dragged or transformed in the viewport.

Unlock selected actors — restores full move/rotate/scale in the viewport.

Snap every selected actor's position on one axis to a reference actor's position.

Lay out selected actors along an axis with a precise gap between their bounds.

Rotate and orbit selected actors around a pivot point.

Drop selected actors to the nearest surface below them.

Redistribute actor pivots evenly between the outermost two actors along an axis.

Snap actors to a user-defined grid derived from two anchor points.

Deep introspect selected actors, components, and properties to JSON.

Headless map of all unique classes (and exposed properties) in the current level.

The Ultimate One-Click Sync: Combines Level Crawling + Verse Schema IQ and updates docs/DEVICE_API_MAP.md.

Export the full live state of every actor in the level — transforms + readable device properties — to a single JSON Claude can reason about.

Query the UEFN Asset Registry for every Blueprint that looks like a Creative device — covering all Fortnite packages, not just the current level.

Fuzzy-search class/function names across the live unreal module

Print full signature + docstring for any unreal.* class or function

Write .pyi stub file for one class (or all classes if name omitted)

Print every *Subsystem class available in this UEFN build

Export monolithic unreal.pyi stub file for full IDE autocomplete

Generate a symmetrical Red vs Blue arena instantly.

Downloads an image directly from a URL into the Editor Content Browser as a Texture2D.

Captures the current image sitting on the Windows Clipboard and imports it as a Texture2D.

Preview naming convention violations without changing anything.

Rename all assets in a folder to follow Epic's naming convention.

Strip a specific prefix from all assets in a folder.

Generate a full naming convention audit report for a folder.

Add a searchable metadata tag to all selected Content Browser assets

Remove a metadata tag from all selected Content Browser assets

Print every Toolbelt metadata tag on all selected Content Browser assets

Find assets by metadata tag — returns matching paths to the Output Log

List every unique Toolbelt tag key used under a folder with asset counts

Export full tag → asset index to JSON (Saved/UEFN_Toolbelt/tag_export.json)