I need to Find Contracts based on a package (a service package offered to customers). I just know the Package ID. Which table/ API to use for getting products of this Package or Contracts where this package is used?
From service package do you mean service product or its something else
No, there is a concept of package in CRM for IS. E.g., you sell your services in a package deal.
customer buys PackageA (which includes X,Y,Z)...I am not much aware of this topic too.