/api/ when entire forum is behind http authorization

[TSP]

I have a test installation which is put behind http authorization. 

However, this means I cannot access the API-area of the admin CP, because I get the following error: 

The API endpoint is not giving the expected response. Check you followed the instructions correctly. The URL being tested is: removed.com/api/core/hello

I have configured nginx to handle /api/ like it should, so that's not the problem. The problem is that IPS tries the requests and gets a 401 http header in response, which it's unable to handle. 

When a 401 is encountered on such requests, at least in the admin control panel, could you please let us be able to provide the http auth information? Or give us a way to bypass this warning without having to edit some core file.

[bfarber]

The API feature itself uses HTTP authorization for authentication, so you can't really have two different authentications like this.