When you add the URL to your database then click it from within KyPass the username/password fields can be populated by long press in the field. This allows you to stay in KyPass and be able to paste both username and password without app switching. Brilliant!
KyPass support various URI schemes in the URL field (http/https internal and all other schemes in their corresponding iPhone app) iSSH have URI scheme support !
By typing <username> or <password> in the http field, <username> or <password> will be replaced by their value.
It means that you could enter ssh://<username>:<password>@example.com in one of your url field and KyPass will open iSSH with a authenticated session on example.com.