s&box MCP Knowledgebase

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

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codeAPI Reference
May 12, 2026

s&box PostProcessManager: Post-processing resource management

PostProcessManager API Reference PostProcessManager is a GameObjectSystem that manages post-processing resources with preview, toggle, and camera attachment. Ty…

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 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

Physgun Grab State with Permission Checks

Physgun Grab State Pattern Implementation pattern for physgun object grabbing with ownership checks and IPhysgunEvent permissions. Key Features Sync'd GrabState…

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

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 5, 2026

Hotloading - s&box Documentation

Hotloading Whenever you save a code file in your project (.cs or .razor files), we recompile and attempt to live-reload the changed assembly. This lets you quic…

menu_bookDocumentation
May 3, 2026

Network Helper

Network Helper Pre-built component for common multiplayer scenarios. What It Does NetworkHelper handles typical multiplayer setup: Auto-creates server if enable…

terminalCode Example
May 12, 2026

RPC-based chat system with avatars and Steam filtering

RPC-Based Chat System with Avatar Support This example shows a complete chat system using Razor, RPC broadcasting, Steam filtering, and avatar display. Key Feat…

terminalCode Example
May 12, 2026

Slot-based inventory UI with BuildHash optimization

Slot-Based Inventory UI with BuildHash Optimization This example shows a slot-based inventory UI with BuildHash() optimization to prevent unnecessary rebuilds a…

terminalCode Example
May 3, 2026

GameManager INetworkListener Pattern

GameManager INetworkListener Pattern Game manager implementing connection lifecycle with player spawning and cleanup. Implemented Interfaces INetworkListener - …

terminalCode Example
May 12, 2026

Drag-and-drop system with static instance pattern

Drag-and-Drop System with Static Instance Pattern This example shows a drag-and-drop system using a static instance pattern for global state management and visu…

terminalCode Example
May 12, 2026

Automatic water volume setup with buoyancy physics

Automatic Water Volume Setup with Buoyancy This example shows automatic attachment of WaterVolume components to colliders tagged "water" and buoyancy physics im…

terminalCode Example
May 12, 2026

IPlayerControllable example: ThrusterEntity

IPlayerControllable Example: ThrusterEntity ThrusterEntity demonstrates how to implement IPlayerControllable for a thruster that responds to player input while …

menu_bookDocumentation
May 20, 2026

Raw Input: Direct Keyboard Access Bypassing Input Actions

s&box provides raw keyboard input access that bypasses input actions. Only use this when input actions won't work — raw inputs cannot be rebound by players. Ava…

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

Creating Post-Process Effects: BasePostProcess with Volume Blending and Shaders

Create custom post-processing effects in s&box by deriving from . This enables volume-based blending and custom shader rendering. The Component Key Methods GetW…

terminalCode Example
May 3, 2026

CleanupSystem Pattern for Map Reset and Scene Management

CleanupSystem - Scene State Management and Map Cleanup A that captures the baseline scene state and allows resetting the map to its original state. Removes spaw…

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 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…