It depends on the airport and the airlines / terminals involved. Sometime MCT is available on the airport's web site, otherwise it is available from paid services like ExpertFlyer, KVS, .... For many airports there are threads on FT with the info --- search "MCT"+connections+"XYZ" where XYZ is the airport code

Normally you don't need to worry because booked connections will meet the MCT. Only if you go independent and book separate tickets do you need to be concerned and need the specialized tools.
Going independent also exposes you to risk if there are flight delays because no airline owns the issue to get you to you destination if there are delays.