Exacting
verb
To demand and enforce the payment or performance of, sometimes in a forcible or imperious way.
“to exact tribute, fees, or obedience from someone”
To make desirable or necessary.
To inflict; to forcibly obtain or produce.
“to exact revenge on someone”
adjective
Making excessive demands; difficult to satisfy.
(of an action, task, etc) Requiring precise accuracy, great care, effort, or attention.
(of a person or organization) Characterized by exaction.
Synonyms: acquisitive, extortionate, grasping, money-grubbing, rapacious, demanding, demanding, niggly