You can use the bot API to fetch your PBs and WRs directly from Mossranking with nightbot commands (or other bots supporting this type of commands) :

For PBs just use  :

$(urlfetch http://mossranking.com/api/getpb.php?id_user=YOUR_MR_ID&cat=CATEGORY_ID&twitch=1)

  and replace YOUR_MR_ID and CATEGORY_ID to the values you want.

For WRs :

$(urlfetch http://mossranking.com/api/getwr.php?cat=CATEGORY_ID&twitch=1)

  where  CAT_ID is the category id you want to fetch. You can find what are the ids here

So you can make commands such as :

!score $(urlfetch http://mossranking.com/api/getpb.php?cat=1&id_user=51&twitch=1) 

  that outputs :

     Score PB is $3,071,750  https://www.youtube.com/watch?v=O5IMsLCgjqY
  

  and the following commands :

!scorewr $(urlfetch http://mossranking.com/api/getwr.php?cat=1&twitch=1)

  that outputs :

     The Score WR is currently $3,461,975 by Kinnijup https://www.twitch.tv/kinnijup/v/73571135


You can remove the "&twitch=1" parameter to get raw json values.

Also (without support) :

Recent runs : here
Get PBs by users : here
Get runs by category : here
Userlist : here