From Soldat Developers' Wiki
There are two available lobby server protocols for public use
- The Client-Lobby Protocol, used by the Soldat client
- The Lobby HTTP API, a re-implementation of the above but over HTTP/JSON for easy access.
- The 3rd party lobby protocol, intended for use by 3rd party application developers. This protocol does not exist, but naturally evolved into the KAG API in use by later THD games.