Getstakedbyaddress

Returns the sum of all the block rewards including transaction fees, lottery wins, etc.

    $ clamd getstakedbyaddress xUcX9QJf8dqD6MbcqjY8JqcJxM6DNd6JL2
    5.92703641
    
    $ clamd getstakedbyaddress xCq1rw2WMJE9P14Jb5wxmftb8vNjdKiPG6
    101.00130000

For an address I don't own:

    $ clamd getstakedbyaddress xGgzHd7Y74kvLDwUJo75TuExYJdiSEiEKL
    error: {"code":-5,"message":"Can't find key for Clam address"}