Matchmaking API (web) questions

[Kovus]

I was hoping I could get some further knowledge regarding the Matchmaking API as described on the wiki at https://wiki.factorio.com/Matchmaking_API .

1- Is it possible to request a filtered list from /get-games/ so that the server doesn't have to return the entire 1MB result set?

2- Is game_id or server_id consistent between new maps for a server running on the same IP:port combination?

3- Is server_id encoded in some fashion that is meant to be decoded? It looks like a base64-encoded value, but I can't make heads or tails of the result of using a base64-decoder.