How to make an API call to my Webservice from Zoho CRM

How to make an API call to my Webservice from Zoho CRM

Hello,

I want to add a widget to the homepage of my Zoho CRM account which will have an input box and will make an API call to my web service to fetch data for the inputed value.

I don't want to fetch CRMs data into my web service. On the other hand, I want to access data from my web service/backend in Zoho CRM via Rest API.