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
May 20, 2026

WebSocket Connections with Auth Token Authentication in s&box

s&box supports WebSocket connections to external servers for custom networking or persistent data outside the local filesystem. Basic Connection and Messaging U…

menu_bookDocumentation
May 20, 2026

WebSockets: External Server Communication with Auth Token Support

s&box allows WebSocket connections to interface with external servers. Common uses include custom networking and persistent data storage outside the local files…

menu_bookDocumentation
May 20, 2026

Property Attributes: Inspector Customization for Components and Assets

Property attributes control how Component properties appear in the s&box editor/inspector. They work on both Components and GameResource properties. Layout and …

terminalCode Example
May 11, 2026

UIDecal Component - Render Razor UI as a Decal

A Render Component for s&box that allows you to project Razor UI onto surfaces as a Decal. Great for sticking UI onto rounded walls, curved surfaces, or any geo…

terminalCode Example
May 3, 2026

WebSockets

Use WebSockets for real-time communication with external servers. Basic Setup With Auth Token Common Use Cases Custom networking — External matchmaking, chat se…

menu_bookDocumentation
May 5, 2026

Inspector property attributes — Range, Group, ShowIf, Title, Feature, and more

Inspector Property Attributes Attributes control how component properties appear in the s&box editor inspector. Apply them alongside on your component fields to…

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 20, 2026

Navigation: Recast NavMesh Generation and Pathfinding in s&box

s&box implements Recast Navigation (the industry standard used in Unreal, Unity, and Godot) for navmesh generation and navigation agents. What is a NavMesh? A s…

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…

menu_bookDocumentation
May 3, 2026

Property Attributes for Editor Inspector

Property Attributes for Editor Inspector Property attributes customize how fields appear and behave in the s&box editor inspector. Organization Attributes Visib…

codeAPI Reference
May 4, 2026

s&box Inspector Attributes: Complete Reference for Component Properties

s&box Inspector Attributes: Complete Reference for Component Properties These attributes control how properties appear in the s&box editor inspector. Display At…

menu_bookDocumentation
May 20, 2026

Razor Components: Reusable UI Fragments with RenderFragment and Generics

Razor Components in s&box allow you to define reusable UI content that can be used inside other razor files. They make panels more agile and composable. Creatin…

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…

menu_bookDocumentation
May 20, 2026

Auth Tokens: Steam Identity Validation for External Services

Auth Tokens validate that HTTP or WebSocket requests originate from a legitimate Steam user in an active s&box game session. Use them to tie data to Steam accou…

menu_bookDocumentation
May 20, 2026

Testing Multiplayer: New Instances, Hotloading, and Local Connect

s&box provides built-in tools for testing multiplayer without needing another player. You can spawn additional game instances that join your running session, wi…

terminalCode Example
May 3, 2026

HTTP Requests

s&box provides the static class for asynchronous HTTP requests. Allowed URLs Domains only (no IP addresses) permitted on ports: 80, 443, 8080, 8443 Use command …

menu_bookDocumentation
May 5, 2026

Custom Editors - s&box Editor Documentation

Custom Editors Custom editors let you create specialized inspector interfaces for your components and assets. Build custom widgets, property drawers, and full i…

menu_bookDocumentation
May 20, 2026

Testing Multiplayer: Local Multi-Instance Development Workflow

The best way to test multiplayer is having someone join your game, but s&box provides tools for solo testing. Spawning a New Instance Click the network status i…

menu_bookDocumentation
May 5, 2026

WebSockets - s&box Networking Documentation

WebSockets s&box supports WebSocket connections for real-time communication with external servers. Use for custom networking, persistent data, or integrating wi…