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
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terminalCode Example
May 3, 2026

Chat UI Pattern with RPC Broadcasting

Chat UI with RPC Broadcasting A Razor UI component for game chat that handles local input, RPC broadcasting, Steam filtering, and automatic message expiration. …

codeAPI Reference
May 12, 2026

s&box BaseToggle: Toggle state base class

Abstract base class for toggle state with [Sync] support and event callbacks. Properties Methods Usage Inherit from this class for any component that needs a sy…

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

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 5, 2026

VirtualGrid — efficiently rendering large scrollable lists in s&box UI

VirtualGrid — Efficiently Rendering Large Lists in UI is a s&box UI panel that virtualizes a large collection — only the visible cells are created in the DOM. S…

terminalCode Example
May 10, 2026

Reusable World-Space Interaction Prompt Framework

A small, compartmentalized interaction framework can be built from three pieces: : the base component placed on objects the player can use. : the player-side ra…

menu_bookDocumentation
May 4, 2026

GameResource: Custom Asset Types, PostLoad, PostReload, ResourceLibrary.Get, and Resource Networking

GameResource: Custom Asset Types, PostLoad, and Resource Networking is the base class for all JSON-based assets in s&box (prefabs, scene files, custom assets). …

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…

menu_bookDocumentation
May 20, 2026

Razor Panels: HTML/CSS UI with C# in s&box

s&box UI can be created using Razor syntax — web-like HTML/CSS combined with C#. Panels are not rendered via a HTML renderer; the syntax is a convenience layer …

menu_bookDocumentation
May 12, 2026

BuildHash pattern for Razor panel optimization

BuildHash Pattern for Razor Panel Optimization BuildHash is a method you can override in Razor panels to prevent unnecessary rebuilds when the underlying state …

menu_bookDocumentation
May 20, 2026

Razor Panels: HTML/CSS UI with C# in s&box PanelComponent System

s&box Razor Panels use web-like HTML/CSS syntax with C# for UI creation. Panels are rendered natively (not via HTML renderer) — the syntax is a convenience laye…

terminalCode Example
May 3, 2026

Inventory Hotbar UI Component

Inventory HUD with Hotbar A Razor PanelComponent that displays player inventory slots as a hotbar with mouse wheel and number key support. Implementation Key Fe…

menu_bookDocumentation
May 12, 2026

Steam filtering API for user content sanitization

Steam Filtering API in s&box s&box provides Steam filtering APIs to sanitize user-generated content like names and chat messages. This helps prevent profanity, …

menu_bookDocumentation
May 5, 2026

Custom Editors - s&box Editor Documentation

Custom Editors Custom editors let you create specialized inspector interfaces for your components and assets. Build custom widgets, property drawers, and full i…

terminalCode Example
May 5, 2026

WorldPanel and ScreenPanel — HUD overlays and 3D world-space UI with Razor PanelComponent

WorldPanel and ScreenPanel — UI in the World s&box UI uses (Razor) attached to either a (HUD overlay) or (3D world-space UI). The same component works with both…