Note: To view a list of all available add-ons and enable the ones you want, navigate to MemberDash >Modules

To enable Rest API, navigate to MemberDash > Modules and scroll down until you see the Rest API section and click the switch to enable it.

Now that Rest API is enabled, you can click the settings link to open up some Rest API options.

From here you can determine your API namespace, as well as the API Passkey.