s&box MCP Knowledgebase

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

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terminalCode Example
May 20, 2026

Code Cheat Sheet: Quick Reference for GameObjects, Components, and Transforms

Quick reference for common s&box operations covering debugging, transforms, GameObjects, and Components. Useful when you know what you want to do but not the ex…

menu_bookDocumentation
May 20, 2026

MusicPlayer: Streaming Audio with Visualization and World-Space Positioning

in s&box handles music tracks and streaming audio with programmatic control over playback, positioning, and visualization. For sound effects, use the Sound syst…

menu_bookDocumentation
May 20, 2026

ActionGraph: Visual Scripting with Nodes, Links, and Control Flow

ActionGraph is s&box's visual scripting language. Each node describes an action or expression, and links between nodes carry values or signals. No C# coding req…

menu_bookDocumentation
May 20, 2026

DecalDefinition: PBR Decal Assets with Color, Normal, and Parallax

A DecalDefinition in s&box holds what a single decal should look like. It describes color, normals, roughness, metalness, ambient occlusion, and optional parall…

menu_bookDocumentation
May 20, 2026

PlayerController: Built-in First/Third Person Controller with Physics, Input, and Camera

The PlayerController component is a first and third person player controller built into s&box. It is physics-based (a special RigidBody) with built-in input, ca…

menu_bookDocumentation
May 20, 2026

Leaderboards: Stat-Based Rankings with Filtering, Centering, and Aggregation

Leaderboards in s&box are stats aggregated and ordered. They use the same stat system and provide filtering, sorting, and centering options. Basic Example By de…

menu_bookDocumentation
May 20, 2026

HTTP Requests: Async GET, POST, and JSON with the Static Http Class

s&box provides a static class for creating asynchronous HTTP requests (GET, POST, DELETE, etc.) with JSON content and response parsing. URL Restrictions Only or…

menu_bookDocumentation
May 20, 2026

Testing Multiplayer: Local Multi-Instance Development Workflow

The best way to test multiplayer is having someone join your game, but s&box provides tools for solo testing. Spawning a New Instance Click the network status i…

menu_bookDocumentation
May 20, 2026

NavMesh Agent: AI Pathfinding Component with Crowd Control

The s&box NavMeshAgent component moves GameObjects along the NavMesh automatically with built-in crowd control to avoid collisions between agents. Component Set…

menu_bookDocumentation
May 20, 2026

Console Variables and Commands: ConVar and ConCmd Runtime Configuration

s&box provides console variables () and console commands () for runtime configuration and debugging. Console Commands Static methods with attribute: Server Comm…

menu_bookDocumentation
May 20, 2026

ISceneStartup: Scene Initialization Events for Host and Client Setup

The event interface in s&box allows Components and GameObjectSystems to listen to scene startup events. These run when pressing play in editor, loading a game, …

menu_bookDocumentation
May 20, 2026

Cloud Assets: Using sbox.game Models, Textures, and Sounds in Your Project

s&box provides access to a large selection of cloud assets (textures, models, sounds) from sbox.game without manual downloading or mounting. Cloud Browser Drag …

menu_bookDocumentation
May 20, 2026

Custom Assets: GameResource Definition with Inspector and Hotloading

Define custom asset types as in s&box. They provide inspector windows, are hotloaded in-game, and are stored as JSON files with custom extensions. Creating a Cu…

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

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

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

Dedicated Servers: Installation, Configuration, and Command Line

s&box dedicated servers run headless and can be installed via SteamCMD. They host multiplayer games without requiring the full editor. Installation Install via …

menu_bookDocumentation
May 20, 2026

Localization: Multi-Language Token System for UI Text

s&box supports localization via JSON token files. Any displayed string beginning with is treated as a localization token and automatically replaced with the use…

menu_bookDocumentation
May 20, 2026

Achievements: Score-Based and Stat-Based Player Unlocks

s&box achievements allow players to unlock rewards with configurable scores. The API lives in . Score Each achievement has a score (5-100). Low values for easy …

menu_bookDocumentation
May 20, 2026

Cloud Assets: Referencing and Runtime Mounting from sbox.game

s&box provides access to a large library of cloud assets (models, textures, sounds) hosted on sbox.game. Assets are downloaded and cached automatically — no man…