s&box MCP Knowledgebase

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

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Results for "Networking" in menu_bookDocumentation 154 results closeClear
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 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 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 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 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

Network Visibility: Per-Connection Object Culling with INetworkVisible

Network Visibility controls whether a networked object should be visible (receive ongoing network updates) for a specific player. By default, all networked obje…

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…

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

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…

menu_bookDocumentation
May 5, 2026

Networked Objects - s&box Documentation

Official s&box documentation for Networked Objects and ownership. Networked Objects covers GameObject networking setup and configuration. Ownership determines w…

menu_bookDocumentation
May 4, 2026

Rigidbody Component: Networked Velocity, Proxy Physics Simulation, Impact Damage, and SmoothMove

Rigidbody Component: Networking, Velocity Sync, and Proxy Physics Simulation The component is the primary way to add physics simulation to a . It implements and…

menu_bookDocumentation
May 20, 2026

Connection Permissions: CanSpawnObjects and CanRefreshObjects

The host can change permissions for a specific in s&box multiplayer. The ideal place to set these permissions is in the network event callback when a player con…

menu_bookDocumentation
May 4, 2026

[Sync] Attribute: SyncFlags.FromHost, SyncFlags.Interpolate, SyncFlags.Query — How Property Sync Works

[Sync] Attribute: SyncFlags and How Property Synchronization Works The attribute marks a component property for automatic network synchronization from the owner…

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

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 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…

menu_bookDocumentation
May 4, 2026

NetworkMode, NetworkFlags, OwnerTransfer, NetworkOrphaned — Complete Networking Enum Reference

NetworkMode, NetworkFlags, OwnerTransfer, and NetworkOrphaned — Complete Reference NetworkMode Controls how a is networked. Set via . Once a is a , only the hos…

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…

menu_bookDocumentation
May 3, 2026

Network Ownership System

Network Ownership System Control who simulates and updates networked GameObjects with the ownership system. Ownership Basics Every networked object has an Owner…

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…