How to add any customised end points to a GET api request

Hello,

The filter parameter or  API filtering part isn't provided on the API page of Spira for all GET requests.  

Here I want to ask if a date filter can be added before any  Get APIS requests that we use.

I have a GET request like 

"https://company-pro-ext.it.comp.com/SpiraPlan/Services/v5_0/RestService.svc/projects?" date filtering"