Data

?itemtype[0]=log
&itemtype[1]=Member
&itemid[0]=18235
&itemid[1]=1382
&fields[0]=userid
&fields[1]=name

Response (131 bytes)

[
    {
        "error": "Unrecognized [itemtype] `log`",
        "error_code": "INVALID_PARAMS"
    },
    [
        "tom"
    ]
]

This help response is displayed by adding &help to any API call. Use the Raw Response in your apps.