Ubios-udapi-server [8K]

journalctl -u ubios-udapi-server -f

UDAPI implements a JSON-RPC 2.0 compliant interface for structured command execution. This ensures that commands sent from the controller (e.g., "Change Port 5 to VLAN 20") are executed transactionally.

The device might be on a different VLAN or blocked by firewall rules. Ensure L2 discovery (multicast/ broadcast) is allowed. ubios-udapi-server

Home Assistant has a native UniFi integration, but advanced users call the API directly. Query the ubios-udapi-server every 30 seconds to get the list of connected clients. Use that data to trigger automations (e.g., "If John's iPhone leaves, arm the alarm").

  • Authentication & Access Control
    Handles local user sessions, API keys, and permissions – critical for scripts and third-party tools to interact securely with the UniFi OS. journalctl -u ubios-udapi-server -f

  • Event & Telemetry Relay
    Forwards system events (e.g., device connected, alert triggered) to the appropriate UniFi applications and to Ubiquiti’s cloud (if enabled).

  • Application Lifecycle Management
    Coordinates starting/stopping UniFi applications (Network, Protect) and managing their ports/services. UDAPI implements a JSON-RPC 2

    • The server listens primarily on specific TCP ports (typically internal to the UniFi OS instance to prevent external tampering). It utilizes:

    If you’ve ever dug into the internals of a Ubiquiti UniFi OS console (like the UDM Pro, UDR, or Cloud Key Gen2+), you’ve likely stumbled across a process called ubios-udapi-server while running top or ps aux.

    It’s not as famous as unifi-core or mongod, but this service quietly powers one of the most important parts of modern UniFi networking: the device communication layer.