AnimationCurve and integers

I'm trying to create animation curves at runtime to assing to an animation clip. Specifically I'm trying to "animate" a set of ints but I noticed that isn't a supported value for keyframes, so I'm trying to find a workaround to make this work and foudn this on the docs:

"Booleans in script components are not supported by the animation system, but booleans in certain built-in components are. For those booleans, a value of 0 equals False while any other value equals True."

Any idea how this is managed for special cases on booleans? As it may be helpfull to find a workaround for integers too. Also noticed that by changing a value of a float trough a curve that has an accessor the value won't be changed, but turning the variable into a simple public float it works, any reason for that?

Thnaks.