Okay, so I found these posts:
And I got to a pre-release version of the docs, I think: http://smartthings-documentation.readthedocs.org/en/latest/cloud-and-lan-connected-device-types-developers-guide/building-lan-connected-device-types/building-the-device-type.html
But I still can’t figure it out, I think I’m missing the subscribe portion, but the docs only talk about upnp.