After adding a Google Home to my collection of gadgets I thought it would be useful to use it to control my AV setup.
I came across the inspirational OmerTu/GoogleHomeKodi project and thought that it was relatively straightforward and could lend itself to controlling Sonarr for me as well. I may actually consider putting it into a fork of the GoogleHomeKodi project as a plugin, but for now I've developed a standalone version based on OmerTu's code.
For now it only deals with looking up a series and adding the first match it finds for Sonarr to monitor.
http://[your external ip]:8089/series?term={{TextIngrediant}}
$ curl -H "Content-Type: application/json" -X POST -d '{"token":"mysafeword"}' http://[my server ip]:8089/series?term=mr+bean