Memory hacks?

Kind of obvious else It would probably exist..

I wouldn't think the whole thing was server sided, there has to be some stuff client side. For example health or View distance. A possible way of duping I would think is the free cam, brake chest dupe. So what you would do in memory is find the function that is making it close when broken and null it out.

Well when the server sends you those packets to hurt you, you can intercept and edit them with programs like wireshark.

You don't understand do you, fall damage does not happen only server side, any damage does not happen, is not all server side. Basically the client and server communicate in one way or another, look in cheat engine at a value you have, for example wood. You cant change the value client side but it shows your client and the server are both interacting with that wood.

Well I was just explaining to you part of the solution, because the way your explaining how the server and client communicate is wrong, I was just asking why no one has memory hacks. And I am presenting ideas on how to make some. If you wanted to use packet manipulation (which is complicated) you can unban your self from mc servers depending if the packets are encrypted.