HTTP API sub-users allow you to provide an HTTP API access to your customers or to set up different limits and access to the parts of your system. For example, you can set up a different HTTP API sub-user for each of your websites, servers or control panels and each sub-user will have access only to its resources and will not be able to access the data of the other sub-users.
You can navigate from the left menu to see how you can create and modify sub-users directly with a main HTTP API user.