@nydas from a technical perspective you could need a program that could interpret the JSON and pick out the bits necessary to reformat it into a post for kbin. The question of whether this would remain as an option after the API changes is left to the reader :-)
If you were doing this solely for your own content then there probably wouldn't a problem doing that but would you have permission to also include contributions from others?
The concept seems similar to the bridges between Twitter and Mastodon and I think that was generally thought of as a bad idea, and a number of places blocked it.