does adobe captivate has a feature for a typing input
just like monkeytype.com or typeracer kind of thing ?
AFAIK monkeytype.com is meant for typing text, for measuring typing speed etc...
Captivate is an eLearning authoring tool, not a typing test tool.
The learner can type text as input for Captivate, and there are many possibilities: scrolling text interaction, notes interaction, text entry box, Fill-in-the-Blank slides, short answer slides. But all of them have different goals than what you expect from monkeytype.com.
If you would like to make Monkeytype.com available to your learners as part of a greater course on typing, you can insert a web object on any slide and copy and paste the link for monkeytype.com in the web object URL in the properties inspector. The advantage is that you don't have to divert your learners away from the learning. Once they have tested their typing speed (I'm 72 words per minute, by the way), they can proceed with the rest of the elearning project.