It's already available, but given the lack of documentation I understand it's hard to find. We refer to the sgminer 5.5 API docs, but those are somewhat confusing as well... Anyway, the "devdetails" command is what you want. For a single gpu, this is what you get, the "Kernel" field contains the algo:


$ echo '{"command": "devdetails"}' | nc localhost 4028 | python -m json.tool
{
    "DEVDETAILS": [
        {
            "DEVDETAILS": 0,
            "Device Path": "05:00:0",
            "Driver": "opencl",
            "ID": 0,
            "Kernel": "cn_conceal",
            "Model": "Radeon RX 570 Series",
            "Name": "GPU"
        }
    ],
    "STATUS": [
        {
            "Code": 69,
            "Description": "TeamRedMiner 0.5.7.1",
            "Msg": "Device Details",
            "STATUS": "S",
            "When": 1566223785
        }
    ],
    "id": 1
}