If you're trying to check that the first character is " then you need to double the quotes. In other words, test as follows:

if $e(chunk,1,1)=""""

I expect it gets hit whenever an HTTP client accesses that URL.

I expect it will consume a license in the normal way.

Can you use web server logs to find out where the HTTP requests are coming from?

Also, is this a duplicate of a previous question from you?

Maybe adding the /recursive=1 qualifier will give you what you want. If so, please click the checkmark to accept this answer.

SAMPLES>d $system.OBJ.Export("Cinema.Film.cls","c:\s\exp1.xml")                  
Exporting to XML started on 04/13/2017 09:49:36
Exporting class: Cinema.Film
Export finished successfully.
 
SAMPLES>d $system.OBJ.Export("Cinema.Film.cls","c:\s\exp2.xml","/recursive=1")   
Exporting to XML started on 04/13/2017 09:49:39
Exporting class: Cinema.Duration
Exporting class: Cinema.Film
Exporting class: Cinema.FilmCategory
Export finished successfully.
 
SAMPLES>

Maybe add the "f" flag to your compilation options?

Launch an admin-level command window, then run csession.exe in the bin directory of your Caché install, giving your instance name as the argument, e.g.

If this works for you please click the checkmark alongside the answer.