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 10, 2026

Trigger-Based Background Music Crossfade Framework

This pattern replaces area music with a small local-client music framework. Each zone requests a target , while one controller crossfades the currently playing …

menu_bookDocumentation
May 5, 2026

Achievements - s&box Services Documentation

Achievements s&box provides an achievements system that integrates with Steam. Achievements can be unlocked automatically based on stats or manually via code. S…

menu_bookDocumentation
May 3, 2026

Backend Services - Achievements, Leaderboards, Stats

Backend Services - Achievements, Leaderboards, Stats Integrate Steam backend services for player progression, competition, and analytics. Achievements Track and…

menu_bookDocumentation
May 5, 2026

Styling Panels - s&box UI Documentation

Styling Panels Style your UI panels using SCSS-like stylesheets or direct code styling. Using Stylesheets Create files alongside your files: Or specify a differ…

codeAPI Reference
May 4, 2026

s&box TimeSince and TimeUntil: Convenient Time Measurement Structs

s&box TimeSince and TimeUntil: Convenient Time Measurement Structs Both structs use internally and support implicit conversion from /. TimeSince Measures time e…

menu_bookDocumentation
May 4, 2026

Networking State in s&box: IsHost, IsClient, IsActive, and Lobby Management

Networking State in s&box: IsHost, IsClient, IsActive Understanding the networking state is critical for writing correct multiplayer code in s&box. Key Properti…

terminalCode Example
May 10, 2026

Extensible Player Data Save Hooks for World Components

This pattern lets gameplay components plug into a player's save/load flow without putting every feature directly inside one large class. The framework has three…

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…

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 12, 2026

LocalData static class: Server-side data persistence

LocalData Static Class API Reference LocalData provides server-side data persistence that survives server restarts. It's useful for storing configuration, ban l…

menu_bookDocumentation
May 4, 2026

s&box SceneNetworkSystem: Scene Loading and Snapshot Protocol

s&box SceneNetworkSystem: Scene Loading and Snapshot Protocol is the core networking system that manages scene loading, object spawning, and snapshot synchroniz…

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 4, 2026

ISceneLoadingEvents: Async Scene Load Hooks with BeforeLoad, OnLoad, and AfterLoad

ISceneLoadingEvents: Async Scene Load Hooks Implement on a to hook into the scene loading pipeline. The game waits for async tasks to complete before proceeding…

terminalCode Example
May 3, 2026

Storage (UGC)

Manage user-generated content, save games, and player creations. Creating Entries Entry Properties Reading Files Listing Entries Deleting Entries Steam Workshop…

menu_bookDocumentation
Jun 16, 2026

Building a Networked Radio System with 3D Audio and Sync

Building a functional, interactive, and multiplayer-compatible radio system in s&box requires coordinating networked replication, local 3D audio handles, extern…

menu_bookDocumentation
May 5, 2026

File System - s&box Assets Documentation

File System s&box provides several file systems for different purposes - data persistence, mounted content, and organization. File Systems Data File System For …

menu_bookDocumentation
May 12, 2026

LocalData persistence for server-side data

LocalData Persistence in s&box LocalData provides server-side data persistence that survives server restarts. It's useful for storing configuration, ban lists, …

terminalCode Example
May 3, 2026

Physics Tracing Code Examples

Physics Tracing Code Examples Raycast and shape trace examples using — the builder pattern for physics queries. TraceResult Properties Builder Pattern Methods

terminalCode Example
May 3, 2026

Achievements and Services

s&box provides built-in services for achievements, stats, and leaderboards. Achievements Unlock an Achievement Achievement Types Stat-based - Auto-unlock when s…

codeAPI Reference
May 12, 2026

s&box NavigationLayer: NPC navigation

NPC behavior layer that handles navigation using NavMeshAgent. Provides movement commands and status tracking. Properties Methods Behavior Uses NavMeshAgent for…