MqttLink
MQTT client for Unreal - connect, publish and subscribe with QoS levels, retained messages and Blueprint + C++ APIs.
Highlights
MqttLink brings the industry-standard MQTT protocol to Unreal Engine. Publish telemetry, subscribe to topics and drive gameplay from broker messages - perfect for IoT, dashboards and companion apps.
Connect to any MQTT broker, subscribe to topic filters with + and # wildcards, publish with the QoS level each message deserves, and receive everything as game-thread Blueprint events. Retained messages, clean-session control and the topic-matching helper cover the protocol's practical corners, and demo content shows the full flow end to end.
MQTT is the lingua franca of IoT and messaging infrastructure. MqttLink turns Unreal into a live participant: digital twins reacting to factory sensors, smart-building visualizations, companion-app control channels, robotics dashboards, and cross-service game messaging through brokers like Mosquitto, EMQX or HiveMQ.
MqttLink 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:
- MQTT connect/publish/subscribe/unsubscribe
- QoS 0/1/2 and retained messages
- Game-thread Blueprint events
- Topic wildcard matching helper (+/#)
- Demo content included
- Utility node pack: CRC32/MD5/SHA-1 hashing, GUIDs, timestamps, random tokens and hostname validation
Full documentation: https://demo.alphaxp.net/FabStore/Network/MqttLink/
Support: https://alphaxp.net/
Everything included
- MQTT connect/publish/subscribe/unsubscribe
- QoS 0/1/2 and retained messages
- Game-thread Blueprint events
- Topic wildcard matching helper (+/#)
- Demo content included
- Utility node pack: CRC32/MD5/SHA-1 hashing, GUIDs, timestamps, random tokens and…
Platforms
Requirements
- Unreal Engine 4.27 and 5.2 – 5.8
- Develop on Windows, macOS, Linux
- Blueprints and C++
In the download
Personal
One non-commercial project
- 1 activation seat
- 1 year of updates
- One end product
- Non-commercial use
- Community support
- 14-day refund window
Commercial
Ship paid products
- 5 activation seats
- 1 year of updates
- One paid end product
- Unlimited end users
- Priority support
- Source files
- 14-day refund window
Extended
Resell & white-label
- Unlimited activation seats
- Lifetime updates
- Unlimited end products
- White-label & resell
- 1-hour SLA
- Seat-free team use
- 14-day refund window
One purchase per product, no subscription. Each licence comes with a signed key — 1 seat on Personal, 5 seats on Commercial, unlimited seats on Extended. Paid licences can be refunded within 14 days from your order page.
- v1.0.0LatestAug 11, 2026
- Unreal Engine 4.27 and 5.2 – 5.8
- Blueprint and C++ API, HTML documentation
Be the first to review MqttLink — reviews come from customers who bought it, so every one is a verified purchase.
Frequently asked
How do I get the files after paying?
Straight after checkout you land on your order page with the download button and your licence key. A receipt is emailed to you, and every order stays in My library.
Which licence do I need?
Personal — One non-commercial project. Commercial — Ship paid products. Extended — Resell & white-label. The Licences tab compares them side by side.
On how many devices can I activate it?
1 seat on Personal, 5 seats on Commercial, unlimited seats on Extended.
How long do I get updates?
Personal: 1 year of updates, Commercial: 1 year of updates, Extended: lifetime updates, counted from your purchase.
Can I get a refund?
Yes — paid licences can be refunded within 14 days, straight from your order page.
Is the download safe?
The file was scanned with ClamAV when it was published. Its SHA-256 checksum is listed under Features → In the download, so you can verify the file you receive.
Do I need an account?
No. Checkout only needs your email. Signing in keeps all your purchases, keys and downloads together in My library.
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