s&box MCP Knowledgebase

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

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menu_bookDocumentation
May 4, 2026

Inspector Attributes: Group, Title, Icon, Range, InfoBox, Feature, and More

Inspector Attributes: Controlling How Properties Appear in the Editor s&box provides a rich set of attributes to control how component properties appear in the …

menu_bookDocumentation
May 12, 2026

s&box ServerSettings: Server-controlled settings

ServerSettings Static Class ServerSettings is a static class that defines server-controlled settings replicated to all clients. These ConVars control game-wide …

menu_bookDocumentation
May 4, 2026

RPC Attributes: Rpc.Broadcast, Rpc.Host, Rpc.Owner — Targeting, NetFlags, and Rpc.FilterInclude/Exclude

RPC Attributes: Rpc.Broadcast, Rpc.Host, Rpc.Owner — Targeting and Flags s&box RPCs are declared with nested attributes on the static class. The old top-level a…

menu_bookDocumentation
May 4, 2026

Game Static Class: ActiveScene, ChangeScene, TypeLibrary, Cookies, and Core State Properties

Game Static Class: ActiveScene, ChangeScene, TypeLibrary, and Core State The static class is the primary entry point for global game state in s&box. Core State …

codeAPI Reference
May 12, 2026

s&box ServerSettings: Replicated server-controlled settings

ServerSettings API Reference ServerSettings is a static class for server-controlled settings that are replicated to all clients. Type Signature Example Property…

menu_bookDocumentation
May 5, 2026

RPC Messages - s&box Documentation

RPC Messages Components can contain RPCs. An RPC is a function that when called, is called remotely too. Supported RPC arguments are the exact same as Sync prop…

menu_bookDocumentation
May 12, 2026

s&box DupeMovement: Duper movement types

s&box DupeMovement Enum DupeMovement is an enum that describes the type of movement a duper contraption is designed for. This metadata helps users understand ho…

menu_bookDocumentation
May 20, 2026

Sync Properties: Networked State with Change Detection and Collections

The attribute on a Component property sends its latest value to other players each time it changes. Only the owner of the object can change synced properties. B…

menu_bookDocumentation
May 20, 2026

RPC Messages: Broadcast, Owner, Host with Filtering and Caller Info

Components can contain RPCs — functions that when called locally, are also called remotely. Supported RPC argument types are the same as Sync properties. Basic …

menu_bookDocumentation
May 20, 2026

Playing Sounds: SoundHandle, GameObject.PlaySound, and Audio Components

s&box provides several ways to play sounds: fire-and-forget at a position, controlled via , attached to a , or via scene components. SoundEvent Assets Sounds ar…

menu_bookDocumentation
May 5, 2026

Sync Properties - Complete Networking Guide

Sync Properties Sync Attribute Adding the attribute to a property on a Component will have its latest value sent to other players each time it changes. These pr…

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

Platform Chat: Built-in Text Chat with IChatEvent Filtering

s&box includes a built-in platform chat system for multiplayer games. Messages are routed through the host, validated, filtered via Steam's text filter, and dis…

menu_bookDocumentation
May 20, 2026

Platform Chat - Built-in Multiplayer Text Chat System

Built-in text chat for multiplayer games. Messages are routed through the host, validated, filtered, and displayed via the standard overlay UI - no game code re…

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

Sync Properties: Automatic Property Replication with [Sync] Attribute

Adding the attribute to a property on a Component will have its latest value sent to other players each time it changes. Only the owner of the object can change…

menu_bookDocumentation
May 20, 2026

Network Events: INetworkListener and INetworkSpawn Interfaces

React to players joining and leaving by implementing or on a component in the scene. INetworkListener Example Spawn a player object when someone joins: INetwork…

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…

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
May 5, 2026

Libraries - s&box Code Documentation

Libraries Libraries are reusable code packages you can share between projects or distribute to others. They provide a way to modularize your code and avoid dupl…