We’re going to give you the steps to make sure you know where to go and how to find your Mixer stream key in your Mixer account.
We also wrote guides for the other platforms here: YouTube
The easy route is merely using the link here: My Stream Key
, which will bring you directly to the main page where you can find your Mixer stream key in your Mixer account (You will need to create a Microsoft account if you do not have one).
Please note, you will have had to complete the application process that takes 24 hours to get approved before it allows you to view your stream key and start streaming at Mixer.