Lets assume that I use
https://blockexplorer.com/ is there any way I can simply check the overall wallet balance and transaction history?
The GUI does it for you, it's in the bottom part labeled as "
Balance" and the history is listed in the "
history".
I don't get why you need to query your balance using a third-party client/explorer.
If you're using the daemon, you can import your "
master public key" to the GUI client to create a watch-only wallet for this purpose.
It's best if you can provide some info about your operating system, Electrum version and your goal.