Would like to know if List Elements by WHERE is supported using REST API? For E.g. List Elements for a matching CCID.
I don't see a 'List Elements' REST API action available. There is a 'Print Element' API call that does have 'where' statements. That appears to support CCID searches:
Limits the processing to that Element that match one of the supplied CCIDs. You can use a name-mask in this field.
I don't believe it does, we currently programatically 'filter' these results. If you raise an ideation I'd vote for it.