Good question - unfortunately the Bamboo REST API documentation leaves a bit to be desired still:
Given this, I'm afraid it is not possible to create a deployment environment via REST yet, insofar /deploy/environment is lacking a POST method (any method in fact) to create a new environment.
This matches with two related REST API features, which aren't yet available either:
I'm happy to announce that Bamboo 7.1 has been released and it’s overflowing with awesome new features. Top-voted issues First and foremost, a bunch of JAC top voted issues has been delivered - y...
Connect with like-minded Atlassian users at free events near you!Find an event
Connect with like-minded Atlassian users at free events near you!
Unfortunately there are no Community Events near you at the moment.Host an event
You're one step closer to meeting fellow Atlassian users at your local event. Learn more about Community Events