Start Channel Commercial (Helix)
Helix is currently missing the Kraken endpoint /kraken/channels/<channel ID>/commercial
Running a commercial through the API is e.g. very useful for broadcasters who want to assign that responsibility to someone else.
This is now possible with the "Start Channel" Helix endpoint. Here are the docs: https://dev.twitch.tv/docs/api/reference#start-commercial
For a list of all the endpoints added in June 2020, see this blog post: https://blog.twitch.tv/en/2020/06/18/announcing-the-latest-helix-endpoints-and-hype-train-api/