If you can implement the API, why not implement SSH and execute the commands necessary?

You could do one of the following which have Wordpress Deployment and quick builds of servers:

https://serverpilot.io/a/9f5b39f72604 (Referral link for me)
https://runcloud.io

Both are pretty easy and straight forward, you could do a full WP deployment via their API on ServerPilot, you just would need to call DO to create the Droplet, then ping Serverpilot for the install - some options if nothing else, may not fit, but something to look at/consider.

@dowsoninc

You may want to look at doctl as it can run locally (I use it on my Macbook Pro) and it can connect via SSH.

https://github.com/digitalocean/doctl

https://www.digitalocean.com/community/tutorials/how-to-use-doctl-the-official-digitalocean-command-line-client#making-ssh-connections

I don’t run automation from my MBP right now, though if I were to do so, that’s probably what I’d use. You could wrap a bash script around it to simplify it further (i.e. reduce down common commands).