I only have two kettlebell exercises in my miscellaneous assortment of Calisthenic circuits: Swings and Farmer Walks. Sometimes I do walking swings and sometimes stationary.
I keep the weight to a level when I can keep good swing technique with sets of 10-15. It is more demanding than it looks. As in any exercise, technique is key to avoid injury and for best gain. For Farmer Walks, I use the heaviest I can hang on to for a minute or two while maintaining strong posture.
Some Kettlebell exercises
Do y'all use them in your calisthenic routines?