Inside your RUFUS Cloud account go to your profile section. You'll find this section in the upper-right corner of the navigation bar. Click to access personal and organisation settings.
Profile page
Click in the Api keys tab and scroll down until the Create a new api key section.
Create new api key section
Select an alias for the api key and an access type, and click the Create api key button. That's it!. You can create up to 10 different api keys for your account. You can then manage your api keys in the section below.