This page is just a reference of all the known Steam APIs, I do not know how they work. Please do not email me with questions.
PUBLISHERGETGetAppBetas
https://partner.steam-api.com/ISteamApps/GetAppBetas/v1/
NameValueTypeRequiredDescription
uint32 Yes AppID of game
PUBLISHERGETGetAppBuilds
https://partner.steam-api.com/ISteamApps/GetAppBuilds/v1/
NameValueTypeRequiredDescription
uint32 Yes AppID of game
uint32 No# of builds to retrieve (default 10)
bool NoTrue if we want the info on the depots in each build. False if we don't need that info. Defaults to true.
PUBLISHERGETGetAppDepotVersions
https://partner.steam-api.com/ISteamApps/GetAppDepotVersions/v1/
NameValueTypeRequiredDescription
uint32 Yes AppID of depot
PUBLISHERGETGetCheatingReports
https://partner.steam-api.com/ISteamApps/GetCheatingReports/v1/
NameValueTypeRequiredDescription
uint32 Yes AppID of game
uint32 Yes Time range begin
uint32 Yes Time range end
bool Yes include reports that were not bans
bool Yes include reports that were bans
uint64 Nominimum report id
PUBLISHERGETGetPartnerAppListForWebAPIKeyv2
https://partner.steam-api.com/ISteamApps/GetPartnerAppListForWebAPIKey/v2/
NameValueTypeRequiredDescription
click to setstring Yes access key
string NoFilter app results by type. Can be comman separated, eg: games,dlc
PUBLISHERGETGetPlayersBanned
https://partner.steam-api.com/ISteamApps/GetPlayersBanned/v1/
NameValueTypeRequiredDescription
uint32 Yes AppID of game
GETGetSDRConfig
https://api.steampowered.com/ISteamApps/GetSDRConfig/v1/
NameValueTypeRequiredDescription
uint32 Yes AppID of game
PUBLISHERGETGetServerList
https://partner.steam-api.com/ISteamApps/GetServerList/v1/
NameValueTypeRequiredDescription
string NoQuery filter string
uint32 NoLimit number of servers in the response
GETGetServersAtAddress
https://api.steampowered.com/ISteamApps/GetServersAtAddress/v1/
NameValueTypeRequiredDescription
string Yes IP or IP:queryport to list
PUBLISHERPOSTSetAppBuildLivev2
https://partner.steam-api.com/ISteamApps/SetAppBuildLive/v2/
NameValueTypeRequiredDescription
uint32 Yes AppID of game
uint32 Yes BuildID
string Yes beta key, required. Use public for default branch
uint64 NoSteamID of user approving build change, required for public branches of released apps
string Nooptional description for this build
GETUpToDateCheck
https://api.steampowered.com/ISteamApps/UpToDateCheck/v1/
NameValueTypeRequiredDescription
uint32 Yes AppID of game
uint32 Yes The installed version of the game
PUBLISHERPOSTUpdateAppBranchDescription
https://partner.steam-api.com/ISteamApps/UpdateAppBranchDescription/v1/
NameValueTypeRequiredDescription
uint32 Yes AppID of game
string Yes Beta branch name, required. Will not update default branch
string NoDescription for this beta branch, required