Registerkey - https://test-steamproxy.haloskins.io/steamstore/account/registerkey

Account information - https://test-steamproxy.haloskins.io/steamhelp/accountdata
MYactivity - https://test-steamproxy.haloskins.io/id/DeadlyMurk/myactivity
MessagesLog - https://test-steamproxy.haloskins.io/steamhelp/accountdata/GetFriendMessagesLog

Web API key - https://test-steamproxy.haloskins.io/dev/apikey
ThirdPartyLogins - https://test-steamproxy.haloskins.io/steamhelp/ru/accountdata/ThirdPartyLogins

Steam Status- https://steamstat.us/
SteamDB - https://steamdb.info/

SteamTrade Matcher - https://www.steamtradematcher.com/
SteamRep - https://steamrep.com/
SteamID - https://steamid.pro/ru/
Steam.tools - https://steam.tools/
Steam card exchange - https://www.steamcardexchange.net/
Steam.Design - https://steam.design/
IsThereAnyDeal - https://isthereanydeal.com/
STEAMCHARTS - https://steamcharts.com/

HowLongToBeat - https://howlongtobeat.com/
RandomGamePicker - https://gamegauntlets.com/

Interactive Game Maps:
https://www.ign.com/maps
https://mapgenie.io/
https://swissgameguides.com/interactive-maps/