What is the SteamCore::Web Plugin?

The SteamCore::Web Plugin is a Steamworks WEB API Plugin that enables you to utilize Steamworks WEB API for your Unreal Engine 4 Games

Official Documentation
https://partner.steamgames.com/doc/api
Overview
https://partner.steamgames .com/doc/webapi_overview

Getting Started

Make sure the **SteamCore::Web** plugin is enabled

To utilize the Steamworks WEB API, you must aquire your own Web API key from Valve. Read more here

When you’ve aquired your own Web API key, you can start using the SteamCore::Web Plugin with your own AppID. See the settings window below for more information.

Settings

AsyncActionsTimeout
How long (in seconds) until we force timeout Async Actions (if they fail to respond)
DisabledSubsystems
Disabled Subsystems wont get created
Debugging
Will print HTTP request strings
DevMode
Disable HTTP requests, will only print HTTP request strings (without processing them/actually sending them)
Key
Steamworks Web API publisher authentication key.
AppID
Your AppID
DevSteamID
Useful when developing, set a temporary steam id to use
SandboxMode
If enabled, we will use the Sandbox interface ISteamMicroTxnSandbox, This interface is identical to the regular ISteamMicroTxn interface, but no actual transactions will occur.