The portal 'nojailnomooch.Com', "prepared by volunteers", was launched at the Delhi Secretariat here. During an Assembly debate last month, Kejriwal had thrown the challenge to Gupta, after the government had recommended either a CBI or anti-corruption branch in the case.
Mishra said he will "expose" the "conspiracy" that was allegedly afoot to save Dikshit in the next three days.
The countdown will continue for the next 32 days, till August 13, when the deadline set by Kejriwal for Gupta will end, Mishra said. Gupta, the leader of the Opposition, termed it as "drama".
The website may have been launched from a government platform but it has been developed by volunteers and did not cost a penny, Mishra claimed.
"Kejriwal now wants to dilute the impact of corruption charges in Rs 400 crore water scam so that the whole matter becomes a joke," Gupta said in a statement.