Hello,
I am currently reprogramming all the lighting in my house with the deCONZ REST API (and a conbee 3) based on my Philips HUE experience. I have the impression that the deCONZ REST API differs slightly from Philips HUE.
Is there a list of all the possibilities offered by the deCONZ REST API ?
For example, a list of all possible conditions and a list of all possible actions ?
Did you check this documentation?
https://dresden-elektronik.github.io/deconz-rest-doc/getting_started/
Sure, but I haven’t found any information on rules I’ve seen passed on the forum or on Github containing :
/config/localtime
“ddx"
/lastupdated
/attr
I have the impression that not all the possibilities of the API are described in the documentation ??? 
the deCONZ API is identical to Hue… on the part that Hue manages. But Hue only recognizes a small part of Zigbee objects. Use postman for example to visualize (GET) the returns of requests in the json. with a PUT or SET, you will know what is read-write and what is read-only.