How can I modify request url

Hi

I have endpoint: http://mysite.com/requestName
And parameters par1=value_of_param1
par2=value_of_param2
Now i get request url: http://mysite.com/requestName?par1=valu ... _of_param2
I need to send next request url: http://mysite.com/requestName?par1=valu ... ram2/clear

How can I add '/clear' to the request url after all parameters?

Thank's