See the topic: Connecting to the SSRS Server
the URL will be similar to this:
http://ComputerName/ReportServer
http://ComputerName:8082/ReportServer
Notes:
1.The ComputerName is the name of the SSRS Report server or IP address you are connecting to
2.If the port connection is not port 80 you must specify the port number see 2nd example above.
3.Typically the folder part will be called ReportServer
The folder name should NOT end with Reports eg. If you try to do this the connection to the Report Server will fail
http://ComputerName/Reports
http://ComputerName:8082/Reports