can i addimultiple contacts to multiple list in one request like this :
Contact A1,A2,...,A100 ===> List 1
Contact B1,B2,...,B100 ===> List 2
or i have to send two request?
You can definitely accomplish this goal using our bulk import API. You can find the details on this endpoint here:
If you are using one of our SDKs, I should be able to provide some info on how this could be accomplished with that SDK as well.