APIAPI's networked interaction kit: interactor, interactable presets, prediction-friendly interaction protocol, prompt and glyph layer.

• Unreal Engine 5.6, 5.7 and 5.8

• An optional exclusive-queue lock ships as a component: while one player interacts, the others hold a queue position they can read in Blueprint

• A door preset ships as a data asset you point at your own mesh

• A lever preset ships as a data asset you point at your own mesh

• A pickup preset ships as a data asset, with its pickup mode exposed as a setting

• Optional automation suite: Content/UKInteraction/Tests (29 packages) and the UKInteractionTests module are the kit's customer-runnable automated tests. Your game does not need them; the module loads only in the editor. The 7 maps in Content/UKInteraction/Tests/Maps are automation fixtures and are not meant to be played: L_UKTest_Validity is deliberately misconfigured (a deleted preset reference and invalid interactables), so opening or playing it logs load and validator errors by design

• Engine plugins the kit enables in its .uplugin. Both ship with Unreal Engine, so there is nothing extra to install:

• Enhanced Input (EnhancedInput): binds the kit's interact action on the player controller and tells the on-screen prompt which key or gamepad button to show

• Online Subsystem Utils (OnlineSubsystemUtils): used only by the kit's automated test module (UKInteractionTests) to run listen-server and dedicated-server test sessions; the runtime and client modules do not use it

Technical details

• Code modules: UKInteraction (Runtime), UKInteractionClient (ClientOnly), UKInteractionTests (UncookedOnly), UKInteractionDebug (ClientOnly), UKInteractionEditor (Editor)

• Number of C++ Classes: 99

• Number of Blueprints: 10

• Network Replicated: Yes

• Supported development platforms: Win64

• Supported target build platforms: Win64, Linux

• Documentation: the Docs/ folder inside the archive

• Example Project: not included — the demo map L_UKInteractionDemo ships inside the plugin

Important notes

• supported on 5.6–5.8; multiplayer end-to-end suite run on all three

• the newest 3 Unreal versions are supported; a dropped version's archive stays available for 60 days after its notice

• Unreal Engine 5.8 is Epic's last planned UE5 minor; UE6 compatibility is not promised