ClusterLink

ClusterLink is a full SocketCluster client for Unreal Engine. Subscribe to channels, publish JSON payloads and authenticate against your SocketCluster backend in realtime.

ClusterLink implements the full SocketCluster protocol: connect, authenticate through the pluggable auth engine, subscribe to channels and publish JSON payloads, with events for every lifecycle stage. Its six-module architecture separates socket transport, codec, auth, errors and JSON so advanced teams can extend individual layers, while Blueprint users just see clean pub/sub nodes.

SocketCluster backends excel at fan-out messaging, which makes ClusterLink a strong fit for MMO-style world event feeds, cross-server chat, presence and notification systems, and live-ops broadcasts - any design where thousands of clients subscribe to named channels.

ClusterLink is part of the Alpha XP networking collection for Unreal Engine 4.27-5.0+. Every feature is exposed to both Blueprints and C++, ships with styled HTML documentation, and follows one consistent API style across the whole collection. The plugin is compiled and verified against a clean UE 4.27 project, comes with a utility node pack (hashing, GUIDs, timestamps, tokens, validation), and is maintained under the Alpha XP brand with documentation hosted online.

Key Features:

• SocketCluster protocol client
• Publish/subscribe channels with events
• Pluggable auth and codec engines
• Complete JSON object/value API
• Modular six-module architecture
• Utility node pack: CRC32/MD5/SHA-1 hashing, GUIDs, timestamps, random tokens and hostname validation

Full documentation: https://demo.alphaxp.net/FabStore/Network/ClusterLink/
Support: https://alphaxp.net/

Technical details:

Code Modules:

• ClusterLinkClient (Runtime)
• ClusterLinkSocket (Runtime)
• ClusterLinkErrors (Runtime)
• ClusterLinkCodecEngine (Runtime)
• ClusterLinkAuthEngine (Runtime)
• ClusterLinkJson (Runtime)

Number of Blueprints: 0
Number of C++ Classes: 16
Network Replicated: No

Supported Development Platforms:

• Windows: Yes
• Mac: No

Supported Target Build Platforms: Win64

Third Party Software: Yes

This plugin includes MIT-licensed third-party source code, all of it in Source/ThirdParty/ with its licence at Source/ThirdParty/LICENSE. It ships as source, is compiled statically into the plugin, and sends no data back to its authors; no third-party binaries are redistributed. Full license texts accompany the Third Party Software declaration submitted to Epic.

• Copyright (c) 2018-present ZiiCreater LLC - MIT License
• Copyright (c) 2016-present Jan Kaniewski (Getnamo) & Contributors - MIT License
• Copyright (c) 2014-present Vladimir Alyamkin - MIT License

libWebSockets, OpenSSL and zlib are consumed from Unreal Engine's own bundled copies; nothing additional ships with this plugin.

Important/Additional Notes: Built for Unreal Engine 4.27, 5.7 and 5.8. Developed and maintained by Alpha XP.