By using an internal FRP (Fast Reverse Proxy) tunnel, ExApp containers do not need to expose ports to the host or be reachable by the Nextcloud server directly Native WebSocket Support:
Understanding Nextcloud HaRP: The Future of External App Integration harp nextcloud
HaRP is designed for . It allows you to run resource-heavy applications—such as AI models requiring high-end GPUs—on separate physical hardware while maintaining a seamless user experience within the main Nextcloud interface. A single HaRP instance can even manage up to 99 different Docker Engines across your network. Why You Should Care By using an internal FRP (Fast Reverse Proxy)
It routes traffic directly to ExApps, bypassing the standard Nextcloud PHP stack. This means no more polling and significantly lower latency for real-time features. Simplifies Networking: FRP (Fast Reverse Proxy) Why You Should Care It routes traffic directly