Need help with api service activity

Hello,
Im trying to pass variables in end point, it’s correctly taking the end points but I see its displaying forward slash post adding variable to end point. In my case variable is the end of the url and no slashes should be present post the variable Any help on this is appreciated.

we can only little review what was done, due to the redactions

At least do the following corrections:

grafik
Url is a string so we use " for it

grafik
inject te variable correctly e.g by

"https//.........../" & myStringVar

or use the String.Format method