Good morning, @jignashu_solank ...
Could you tell us more about your question? Canvas already has built-in functionality to grade several different question types within classic Quizzes and New Quizzes (New Quizzes is actually an LTI, by the way). So, it wouldn't be necessary to have a separate external tool grade your questions. What kind of information are you trying to obtain from quiz questions that wouldn't already be available? If you could help fill in some of those details, that would be helpful.
I'm going to also share your question with the Canvas Developers group here in the Community in hopes that your question will get some additional exposure. If you are not yet following this group, please click on the link that I have provided, and then you'll see two buttons at the top right corner of your screen to click on: "Follow" and "Actions" >> "Join group". I hope this will be of help to you.
Thanks...be well...stay safe!
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