Oxicash is probably the only online service that enables you to check the value left in your Smart Tag connected to the Delhi-Gurgaon Expressway.

The service has been giving remote server connectivity problems since the last 12 hours.

I am totally unable to find out the value left in my account.

In addition, mchek too has been rather unstable… I have submitted my request to them to recharge my smart tag. No response from them as well.

Update: Looks like the problem was on the servers of Delhi Gurgaon Expressway operators. mchek people have been rather helpful!