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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codeAPI Reference
May 12, 2026

s&box ISpawner: Spawner interface

ISpawner Interface API Reference ISpawner describes something that can be spawned into the world. Implementations handle their own preview rendering and spawn l…

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…

menu_bookDocumentation
May 4, 2026

Sandbox: PlayerInventory — weapon slots, pickup, drop, and loadout persistence

Sandbox PlayerInventory — Weapon Slots, Pickup, Drop, and Loadout Persistence manages up to 6 weapon slots, handles pickup/drop logic, and delegates loadout sav…

codeAPI Reference
May 3, 2026

Sandbox.Http

Sandbox.Http HTTP request utilities. Overview Http provides asynchronous methods for making HTTP requests to external services. GET Request POST Request JSON Re…

terminalCode Example
May 3, 2026

GameManager INetworkListener Pattern

GameManager INetworkListener Pattern Game manager implementing connection lifecycle with player spawning and cleanup. Implemented Interfaces INetworkListener - …

codeAPI Reference
May 3, 2026

Sandbox.Json

Sandbox.Json JSON serialization utilities. Overview Json provides methods for serializing objects to JSON and parsing JSON strings. Serialize Deserialize Parse …

menu_bookDocumentation
May 5, 2026

HTTP Requests - s&box Networking Documentation

HTTP Requests s&box provides an HTTP client for making web requests to external APIs. This is useful for fetching data, submitting scores to custom backends, or…

groupsCommunity
May 5, 2026

Scene setup checklist — minimum viable scene with lighting, post-processing, and physics

Scene Setup Checklist for New Projects A quick reference for the components every new s&box scene typically needs. Minimum Viable Scene Lighting Post-Processing…

terminalCode Example
May 3, 2026

ControlSystem Pattern for Seat/Vehicle Control

ControlSystem - Seat/Vehicle Control Management A that manages control transfer between players and seated entities (vehicles, chairs). Handles input routing an…

menu_bookDocumentation
May 4, 2026

s&box Source Generator: IUpdateSubscriber, WrappedPropertySet, and How [Sync]/[Rpc.*] Work at Compile Time

s&box Source Generator: How [CodeGenerator] Works for [Sync] and [Rpc.*] The Roslyn source generator transforms your C# code at compile time. Understanding this…

codeAPI Reference
May 3, 2026

Door Component with IPressable Interface

Door Component with IPressable Map entity door with animated open/close using curves and the IPressable interface. Key Features AnimationCurve for smooth motion…

codeAPI Reference
May 3, 2026

ToolMode Base Class for Toolgun Modes

ToolMode Base Class Abstract base class for creating toolgun modes in s&box. Handles input registration, action dispatch, and HUD rendering. Class Overview Acti…

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 4, 2026

Code Upgrader Diagnostics: SBOX001-SBOX007 and SB3000 Roslyn Analyzer Warnings

Code Upgrader Diagnostics: s&box Roslyn Analyzer Warnings s&box ships a Roslyn analyzer () that warns about deprecated patterns and auto-fixes them. These appea…

terminalCode Example
May 12, 2026

ControlSystem: Vehicle seat control with IPlayerControllable

ControlSystem: Vehicle Seat Control with IPlayerControllable This example shows the ControlSystem which manages vehicle seat control, sorting seats by occupatio…

codeAPI Reference
May 3, 2026

Sandbox.Vector3

Sandbox.Vector3 3D vector for positions, directions, and offsets. Overview Vector3 is the primary type for 3D coordinates and directions in s&box. Creation Cons…

menu_bookDocumentation
May 3, 2026

s&box Cheat Sheet

s&box Cheat Sheet Quick reference for common s&box operations. Debugging Transforms GameObjects Components Input Networking

terminalCode Example
May 4, 2026

Sandbox: Duplicator tool — copy, paste, and save contraptions with DuplicationData

Duplicator Tool — Copy, Paste, and Save Contraptions The Duplicator tool copies a contraption (a connected graph of GameObjects) to JSON and pastes it back. It …

menu_bookDocumentation
May 5, 2026

PolygonMesh — procedural block meshes with per-face materials and vertex editing

PolygonMesh — Procedural Block Meshes s&box includes a API for creating and editing meshes at runtime or in editor tools. The editor's block mesh tools use this…

terminalCode Example
May 3, 2026

BaseWeapon and BaseCarryable Weapon Framework

BaseWeapon and BaseCarryable - Weapon Framework Base classes for creating weapons in s&box. Provides ammo management, view/world models, and input handling. Bas…