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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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 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…

groupsCommunity
May 5, 2026

s&box networking gotchas — IsProxy, Sync, Authority, NetworkSpawn, and culling

s&box Networking Gotchas Common mistakes when building multiplayer games in s&box. IsProxy vs IsAuthority is true on all clients that don't own the object. Alwa…

menu_bookDocumentation
May 5, 2026

Network visibility — culling networked objects per client with INetworkVisible

Network Visibility — Culling Networked Objects Per Client Network visibility controls whether a networked object sends updates (Sync Vars, transforms) to a spec…

menu_bookDocumentation
May 20, 2026

ISceneStartup: Host and Client Scene Initialization Events

is a scene event interface for listening to scene initialization on host and client. It runs when pressing play in editor, loading a game, or joining a server. …

menu_bookDocumentation
May 5, 2026

Ownership - s&box Networking Documentation

Ownership Network ownership determines which client or the host has authority over a networked GameObject. The owner controls synced properties and can send RPC…

groupsCommunity
May 3, 2026

Multiplayer Authority Patterns

Multiplayer Authority Patterns Community guide for structuring multiplayer code based on official networking documentation and proven patterns. Host-Authoritati…

menu_bookDocumentation
May 4, 2026

Network Visibility Culling: AlwaysTransmit, INetworkVisible, CullDelay, and PVS-Based Object Culling

Network Visibility Culling: How s&box Decides What to Send to Each Client s&box has a built-in network visibility culling system that avoids sending updates for…

codeAPI Reference
May 4, 2026

s&box NetworkMode Enum and INetworkListener: Controlling Network Participation

s&box NetworkMode Enum: Controlling How GameObjects Are Networked controls how a participates in the network. Usage NetworkMode.Object The object has an owner (…

codeAPI Reference
May 12, 2026

s&box AmmoInventory: Shared ammo pools

AmmoInventory Component API Reference AmmoInventory stores shared ammo pools on a player, keyed by AmmoResource. Add this component to the player prefab alongsi…

menu_bookDocumentation
May 20, 2026

INetworkSnapshot: Custom Binary Data in s&box Network Snapshots

s&box Components can implement to write and read custom binary data during the network snapshot process. When a client joins a server, the snapshot is sent once…

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 20, 2026

Networked Objects: NetworkSpawn, Interpolation, and Network Modes

Any GameObject can become a networked object by calling on it. It will then be sent to all clients and can have Sync Properties and RPC Messages. Network Mode I…

menu_bookDocumentation
May 20, 2026

Networked Objects: Spawning, Network Modes, and Interpolation

Any GameObject can become networked by calling . It will then be sent to all clients and can have Sync Properties and RPC Messages. Spawning a Networked Object …

menu_bookDocumentation
May 4, 2026

ISceneStartup: OnHostPreInitialize, OnHostInitialize, OnClientInitialize — Scene Initialization Hooks

ISceneStartup: Scene Initialization Hooks for GameObjectSystems provides callbacks for scene initialization events. It is intended for implementations, not comp…

menu_bookDocumentation
May 4, 2026

NetList and NetDictionary: Delta Sync, OnChanged Callbacks, Write Guard, and CanWriteChanges

NetList and NetDictionary: Networked Collections with Delta Sync and are s&box networked collection types for use with . They only send changes (deltas) over th…

groupsCommunity
May 5, 2026

Common s&box component gotchas — physics, networking, scene, and rendering pitfalls

Common s&box Component Gotchas Practical pitfalls that catch most new s&box developers. Physics Rigidbody + CharacterController on the same GO — don't do it. Th…

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 …

menu_bookDocumentation
May 5, 2026

Network Events - s&box Networking Documentation

Network Events Network events allow you to broadcast and listen for events across the network. Unlike RPCs which target specific objects, network events are glo…

menu_bookDocumentation
May 4, 2026

GameObject.Network Accessor — IsProxy, IsOwner, TakeOwnership, DropOwnership, Refresh, and IGameObjectNetworkEvents

GameObject.Network Accessor — Ownership, Spawning, and Proxy Detection is a that provides all network-related operations for a . It always resolves to the netwo…