Tokens : in the documentation there is an api for Creating Tokens http://developers.marketo.com/rest-api/assets/tokens/#create_and_update. as per my understanding we can do it for one token key value pair in one api call. Is there a way to upsert multiple Tokens in a single API call.
Didn't you ask this exact question before? The answer is still: nope!
Tags : In the documentation, there is no API specified to create the Tokens, so how do we create a token via API.
via API, is there a way to associate tags to an existing Program?
I assume you mean "...no API specified to create the Tags..." in this part not Tokens.
This, too, has been answered in the past couple of weeks. Please search the Community.