s&box MCP Knowledgebase

Documentation, API references, code examples and community knowledge for s&box development.

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menu_bookDocumentation
May 12, 2026

s&box HUD: UI scale factor

HUD Static Class HUD is an internal static class that provides a scale factor for UI elements based on screen resolution. It ensures UI elements scale proportio…

menu_bookDocumentation
May 5, 2026

Styling Panels - s&box UI Documentation

Styling Panels Style your UI panels using SCSS-like stylesheets or direct code styling. Using Stylesheets Create files alongside your files: Or specify a differ…

codeAPI Reference
May 12, 2026

s&box ScriptedEntity: Custom entity GameResource

ScriptedEntity GameResource API Reference ScriptedEntity is a GameResource that defines a spawnable entity with a prefab, used by the spawn menu to create custo…

codeAPI Reference
May 12, 2026

s&box PostProcessResource: Post-processing effect GameResource

PostProcessResource GameResource API Reference PostProcessResource is a GameResource that defines a post-processing effect with a prefab, used by the PostProces…

codeAPI Reference
May 12, 2026

s&box AmmoResource: Shared ammo type GameResource

AmmoResource GameResource API Reference AmmoResource is a GameResource that defines a type of ammo that can be shared across weapons. Weapons that reference the…

menu_bookDocumentation
May 5, 2026

Texture Generators - s&box Editor Documentation

Texture Generators Create procedural textures in code. Generate textures from shapes, gradients, text, or any algorithm. Creating a Generator Inherit from : Pro…

menu_bookDocumentation
May 5, 2026

Inspector property attributes — Range, Group, ShowIf, Title, Feature, and more

Inspector Property Attributes Attributes control how component properties appear in the s&box editor inspector. Apply them alongside on your component fields to…

codeAPI Reference
May 12, 2026

s&box BalloonDefinition: Balloon type GameResource

BalloonDefinition GameResource API Reference BalloonDefinition is a GameResource that defines a balloon type with a prefab, used by the Balloon tool to spawn ba…

menu_bookDocumentation
May 4, 2026

Engine Frame Loop Order: FrameStart, Scene Tick, and FrameEnd Sequence

Engine Frame Loop Order The s&box engine frame loop runs in a specific order each frame. Understanding this is important for knowing when your code runs relativ…

codeAPI Reference
May 12, 2026

s&box BasePickup: Pickup item base

BasePickup Abstract Class API Reference BasePickup is an abstract Component for items that can be picked up by players. Implements ITriggerListener and ICollisi…

menu_bookDocumentation
May 5, 2026

NetworkHelper — quick multiplayer setup with auto-server and player spawning

NetworkHelper — Quick Multiplayer Setup is a built-in s&box component that handles the boilerplate of starting a server and spawning players. It's the fastest w…

menu_bookDocumentation
May 5, 2026

GameResource Extensions - s&box Assets Documentation

GameResource Extensions Extend GameResource types with additional data. Create extensions that attach to existing resources like models or sounds. Creating a Re…

codeAPI Reference
May 12, 2026

s&box SaveSystem: Scene save/load

SaveSystem GameObjectSystem API Reference SaveSystem is a saving/loading system that captures the differences between the current scene state and the original s…

menu_bookDocumentation
May 5, 2026

Storage UGC - s&box Assets Documentation

Storage UGC The Storage system manages user-generated content. Save games, player creations, and share to Steam Workshop. Creating a New Entry Create a storage …

menu_bookDocumentation
May 5, 2026

Physics Events - s&box Physics Documentation

Physics Events Receive callbacks for physics events in the scene. IScenePhysicsEvents Implement this interface on a component to receive scene-wide physics even…

menu_bookDocumentation
May 12, 2026

s&box SnapGrid: World-space snap grid overlay

SnapGrid: World-Space Snap Grid Overlay SnapGrid is a sealed class that manages a world-space snap grid overlay projected onto a surface plane. It is used by th…

codeAPI Reference
May 12, 2026

s&box Tracer: Projectile trail renderer

Tracer Renderer Component API Reference Tracer is a Renderer component that creates a tracer effect (like bullet trails) that travels from its world position to…

menu_bookDocumentation
May 4, 2026

SceneCamera: World-to-Screen, Screen-to-World, Render Hooks, and Camera Properties

SceneCamera: World-to-Screen, Screen-to-World, and Render Hooks is the main camera class in s&box. It wraps a native frustum and provides coordinate conversion,…

menu_bookDocumentation
May 4, 2026

MainThread.Queue: Running Code on the Main Thread from Worker Threads

MainThread.Queue: Running Code on the Main Thread from Worker Threads s&box is single-threaded for game logic. If you have code running on a worker thread (e.g.…

menu_bookDocumentation
May 3, 2026

Editor Tools

Editor Tools Create custom tools for the s&box editor. Creating a Tool Scene Access Gizmo Drawing Preventing Selection Overlay UI Editor Project Setup Tools mus…