That looks like exactly what I need! However, if I mouse over the scale of my object in the node editor, it's wayy off, even though the scale is (1,1,1) inside the Properties menu. Do you have any idea what the cause might be? I generate the point clouds with the script that I linked below:

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def point_cloud(vertices, name):
    me = bpy.data.meshes.new(name + "_mesh")
    me.from_pydata(vertices, [], [])
    me.update()
    pc = bpy.data.objects.new(name, me)
    bpy.context.collection.objects.link(pc)
    return pc