Sure with
Client.UnlockContainerInstance
and all of the platform-specific validate receipt endpoints.
If you mean arbitrarily grant an item to a user with a ClientAPI call then no that would be a huge security issue. However, you can create a simple CloudScript handler to grant an arbitrary item to a User. This comes with the added benefit of allowing you to add checks to ensure the user did indeed earn the item.
Sorry for the lack of a better specific question.
Yes, I meant manually add an item to a user after certain in-game event directly from the client; without the player actually purchasing it. I guess I'll have to go with the cloud script solution then.
Thanks
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