s&box MCP Knowledgebase

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

library_books 595 entries menu_book 352 Documentation code 133 API Reference terminal 100 Code Example groups 10 Community
menu_bookDocumentation
May 20, 2026

Styling Panels: SCSS, Inline Styles, and Code-Based Styling

s&box panels can be styled using SCSS stylesheets, inline styles, style blocks, or direct code manipulation. The styling system uses CSS-like syntax but is rend…

menu_bookDocumentation
May 20, 2026

IScenePhysicsEvents: Pre and Post Physics Step Hooks

lets Components or GameObjectSystems wrap logic around the physics step. Implement it when you have systems that work closely with physics and need to run code …

menu_bookDocumentation
May 20, 2026

Auth Tokens: Steam Identity Validation for External Services

Auth Tokens validate that HTTP or WebSocket requests originate from a legitimate Steam user in an active s&box game session. Use them to tie data to Steam accou…

menu_bookDocumentation
May 20, 2026

Console Variables and Commands: ConVar and ConCmd with Flags

Console variables () and commands () let you create tweakable settings and runnable commands accessible from the s&box console. Console Commands Static methods …

menu_bookDocumentation
May 20, 2026

Property Attributes: Inspector Customization for Components and Assets

Property attributes control how Component properties appear in the s&box editor/inspector. They work on both Components and GameResource properties. Layout and …

menu_bookDocumentation
May 20, 2026

WebSocket Connections with Auth Token Authentication in s&box

s&box supports WebSocket connections to external servers for custom networking or persistent data outside the local filesystem. Basic Connection and Messaging U…

menu_bookDocumentation
May 20, 2026

Custom GameResource Assets: Define, Create, and Access Custom Asset Types

Define custom asset types as subclasses. They get a nice inspector window, are hotloaded in-game, and are stored as JSON files with a custom extension. Creating…

menu_bookDocumentation
May 20, 2026

NavMesh Agent: AI Pathfinding with Crowd Avoidance

The component moves a GameObject along the NavMesh automatically with built-in crowd avoidance. Agents try to avoid bumping into each other when multiple agents…

menu_bookDocumentation
May 20, 2026

IsValid Pattern: Safe Null and Destroyed Object Checks

Destroying a or doesn't erase the C# reference — the variable still holds a non-null but dead object. A plain check will pass on destroyed objects, leading to e…

menu_bookDocumentation
May 20, 2026

Scenes: Loading, Component Lookup, and GameObject Directory

A Scene is a collection of GameObjects that represents the game world. Every Component and GameObject has a property for accessing the current scene, and you ca…

menu_bookDocumentation
May 20, 2026

Time Utilities: TimeSince, TimeUntil, and Frame-Rate Independence

s&box provides time utilities for cooldowns, countdowns, and frame-rate independent movement without manual bookkeeping. Time.Delta Seconds since last frame. Mu…

codeAPI Reference
May 20, 2026

SceneTraceResult: All Fields and Properties from Trace Hits

is returned by and contains all information about a trace hit. Key Fields Common Usage Pattern

menu_bookDocumentation
May 20, 2026

Network Events: INetworkListener and INetworkSpawn Interfaces

React to players joining and leaving by implementing or on a component in the scene. INetworkListener Example Spawn a player object when someone joins: INetwork…

menu_bookDocumentation
May 20, 2026

Playing Sounds: SoundHandle, GameObject.PlaySound, and Audio Components

s&box provides several ways to play sounds: fire-and-forget at a position, controlled via , attached to a , or via scene components. SoundEvent Assets Sounds ar…

menu_bookDocumentation
May 20, 2026

HudPainter: Immediate-Mode HUD Drawing in s&box

Each has a property (HudPainter) for immediate-mode drawing onto the screen. More efficient than UI panels since there's no layout, stylesheets, or interactivit…

menu_bookDocumentation
May 20, 2026

PlayerController: Physics-Based Character with Events Interface

The component is a physics-based first/third person player controller. Add it to a scene and be running around with no programming required. Core Features Physi…

menu_bookDocumentation
May 20, 2026

Stats Service: Recording and Reading Player Statistics in s&box

Games can record per-player stats using . Stats can be queried individually, per-player, or globally. Recording Stats Increment a counter: Set a value directly:…

menu_bookDocumentation
May 20, 2026

Network Visibility: Culling and INetworkVisible Interface

Network Visibility controls whether a networked object sends updates (Sync Vars, Transform) to a specific player. By default, all networked objects always trans…

menu_bookDocumentation
May 20, 2026

Component Interfaces: IDamageable, ICollisionListener, ExecuteInEditor

s&box provides several built-in component interfaces for physics, damage, networking, and editor execution. ExecuteInEditor Runs component methods (OnAwake, OnE…

menu_bookDocumentation
May 20, 2026

Physics Triggers: Enter, Exit Events and Polling in s&box

A trigger is a collider that detects when physics objects enter or exit it without blocking movement. Useful for pickup zones, death planes, checkpoints, and ar…