Is it possible change the post owner?

I can change it via the Admin tool, but I am wondering if this can be done through the API?

「いいね!」 1

Yes. How to reverse engineer the Discourse API

「いいね!」 3

This may also be helpful:

「いいね!」 4

If you only want to change ownership of an individual post, click on the menu below the post, then the wrench. The option to change the ownership of the individual post is in that list.

「いいね!」 3

I feel shame as a developer didn’t work out this way!

「いいね!」 1