Often you end up getting a lx.object.Unknown from Modo's API, this will test the object against all "interfaces" and return list of potentially supported types.

get_ifc.py

import lx

def get_ifc(obj):
  """ From a given object in lx sdk, find supported interfaces"""
  supported_interfaces = []
  for name, ifc in lx.object.__dict__.items():
    try:
      if isinstance(ifc, type):
        o = ifc(obj)
        supported_interfaces.append(ifc)
    except TypeError as e:
      pass
  return supported_interfaces

Better solution is using lxu.unknownInfo(obj)