s&box MCP Knowledgebase

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

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menu_bookDocumentation
May 20, 2026

Decal Component: Projected Surface Effects with Random Variety

The s&box Decal component draws decals in the game world. It supports multiple DecalDefinitions for random variety without extra code. Setup Add a Decal compone…

menu_bookDocumentation
May 20, 2026

VR Development: Tracked Objects, Controllers, and Hand Input

s&box supports VR development with built-in components for headset tracking, controller input, and hand animation. Enabling VR Editor: Launch with headset conne…

menu_bookDocumentation
May 20, 2026

Custom Particle Controller: Code-Based Particle Simulation with Threading

The s&box particle system allows custom code-based particle controllers by inheriting from . Add the component to a GameObject with a ParticleEffect to control …

menu_bookDocumentation
May 20, 2026

Storage UGC: User-Generated Content with Steam Workshop Integration

The s&box Storage system provides a unified way to manage user-generated content in your game. Each storage entry is a self-contained folder with its own filesy…

menu_bookDocumentation
May 20, 2026

Serverside Code: #if SERVER Blocks and .Server.cs Files for Hidden Logic

s&box supports serverside-only code that is stripped from client builds. This only works when running local projects on dedicated servers. #if SERVER Blocks Cod…

menu_bookDocumentation
May 20, 2026

Dedicated Server User Permissions: Claims-Based Access Control via Steam ID

On s&box Dedicated Servers, you can specify admin permissions per user via the file using Steam IDs and claims. Configuration Claims Claims are strings describi…

menu_bookDocumentation
May 20, 2026

Network Visibility: Per-Connection Object Culling with INetworkVisible

Network Visibility controls whether a networked object should be visible (receive ongoing network updates) for a specific player. By default, all networked obje…

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

Animation System: Animgraph, Skeletal Animation, IK, and Ragdolls

s&box uses Valve's Animgraph system for character animation, providing a powerful node-based animation state machine. Key Features Animgraph — node-based animat…

menu_bookDocumentation
May 20, 2026

Navigation: Recast NavMesh Generation and Pathfinding in s&box

s&box implements Recast Navigation (the industry standard used in Unreal, Unity, and Godot) for navmesh generation and navigation agents. What is a NavMesh? A s…

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

Scenes: Loading, Directory Lookups, and Component Queries in s&box

A s&box Scene is a collection of GameObjects. Access the current scene via on any GameObject/Component/Panel, or via . Loading Scenes GameObject Directory Every…

menu_bookDocumentation
May 20, 2026

Prefab Templates: Adding Custom Prefabs to the s&box Create Menu

s&box Prefab Templates let you add custom prefabs to the GameObject Create menu in the scene editor. Setup Enable "Show In Menu" on a Prefab File in the inspect…

terminalCode Example
May 3, 2026

Ownable Component Pattern for Prop Ownership

Ownable Component - Prop Ownership and Permission System A component that tracks which player spawned an object and enforces ownership-based permissions. Useful…

menu_bookDocumentation
May 5, 2026

Editor - s&box Documentation

Editor The s&box Editor provides a modern interface for building games. Features Asset Previews - Thumbnails for models, materials, textures Custom Editors - Sp…

terminalCode Example
May 3, 2026

HTTP Requests

s&box provides the static class for asynchronous HTTP requests. Allowed URLs Domains only (no IP addresses) permitted on ports: 80, 443, 8080, 8443 Use command …

terminalCode Example
May 3, 2026

BaseWeapon and BaseCarryable Weapon Framework

BaseWeapon and BaseCarryable - Weapon Framework Base classes for creating weapons in s&box. Provides ammo management, view/world models, and input handling. Bas…

menu_bookDocumentation
May 5, 2026

Prefabs - s&box Documentation

Prefabs Prefabs are reusable GameObject templates that allow you to create consistent, repeatable objects across your game. You create a prefab asset from a Gam…

terminalCode Example
May 3, 2026

Stats API

Track player statistics with the Stats service. Recording Stats Reading Stats Stat Types Batching Stats are automatically batched and sent periodically. Call as…

menu_bookDocumentation
May 5, 2026

Input - s&box Gameplay Documentation

Input s&box provides a comprehensive input system that handles keyboard, mouse, and gamepad input. The input system uses named actions defined in your project s…