The website attendance.gov.in, launched Sep 30, clocks the in and out times of bureaucrats.
It informs which official attended office on any day, how punctually they arrived, if some of them left midway and where did they go.
The portal as of Monday, covered 50,748 employees in 149 organisations.
Some of the organisations registered include Bureau of Civil Aviation Security, the Armed Forces Tribunal, Central Water Commission, the Cabinet Secretariat and the Ministry of External Affairs.
The website informs about the attendance through graphs.
Any user can find out how many officials in the registered organisations reported for work on a particular day.
A senior official said that the idea had come from Prime Minister Narendra Modi himself.
The idea was not just to improve punctuality but to weed out ghost employees as well, he added.