That would require the active key. Currently, freakazoid only works with the posting key. In theory, you would modify lib/freakazoid/freakazoid.rb to stream :transfer instead of :comment. For example:
stream.operations(:transfer) do |transfer|
next if transfer.from == account_name # no self-reply
reply(transfer)
end
Then replace reply with something that will send a transfer with a memo containing the response from cleverbot's api.
RE: Freakazoid: Cleverbot integration for STEEM.