Ubios-udapi-server -

The behavior of ubios-udapi-server is governed by configuration files typically located in /etc/ubios-udapi-server/ or managed by the UniFi OS read-only file system partitions.

Advanced users modifying the underlying OS (e.g., via udm-utilities or custom scripts) often find that ubios-udapi-server overwrites their manual changes. Because the server enforces the "Controller Truth," if you manually edit a file (like /etc/dnsmasq.conf) and then trigger a provision in the UI, ubios-udapi-server will overwrite your manual edits to match the controller's database.

ubios-udapi-server is a perfect example of how Ubiquiti has matured from a simple AP controller to a full-stack networking platform. It’s not flashy, but without it, your UniFi devices would feel slow, disconnected, and clumsy. ubios-udapi-server

So next time you’re digging through logs or wondering why adoption feels snappier on new firmware — you’ll know exactly which little daemon to thank.

Have you run into any odd behavior with ubios-udapi-server? Drop your experience in the comments below. Have you run into any odd behavior with ubios-udapi-server

Here’s a useful write-up about ubios-udapi-server, aimed at users and integrators working with Ubiquiti’s UniFi OS consoles (like the UDM Pro, UDM SE, Cloud Key Gen2+, etc.).

Unlike Basic Auth, ubios-udapi-server uses stateless JWTs. You cannot simply curl an endpoint with a password; you must first request a token. Unlike Basic Auth, ubios-udapi-server uses stateless JWTs

Request Token:

curl -k -X POST https://192.168.1.1/api/auth/login \
-H "Content-Type: application/json" \
-d '"username":"admin", "password":"your_password"'

Response:

  "access_token": "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9...",
  "token_type": "Bearer",
  "expires_in": 3600

Use Token for subsequent calls:

curl -k -X GET https://192.168.1.1/proxy/network/api/s/default/stat/device \
-H "Authorization: Bearer eyJhbGc..."