May 31, 2017 05:25 AM|EvenMa|LINK
In your case, I think there has no affect to access the Web API with domain name.
According to your description, I’m not sure why the Web API becomes can’t access.
Could the Web API is working well? try to access the Web API help page, such like the following url.
That was auto-generated by visual studio when create the Web API project, it will displayed all APIs.
For more details about help page, you could refer to the following link.
Could you find the API which you wants in help page?
If you have any other questions, please feel free to contact me any time.