Welcome to the Steamworks API Reference!

This section provides a complete listing of everything available in the Steamworks API. You should head over to the Steamworks API Overview before diving in to get setup using the Steamworks API.

For an overview of features provided by the Steamworks API take a look at Features.

If you are using the Web API, you can find documentation for it on the Steamworks Web API Reference.

Interface	Description
ISteamApps	Exposes a wide range of information and actions for applications and Downloadable Content (DLC).
ISteamAppTicket	Interface to get app ownership data. This is used by the Steam DRM wrapper to let it ask about ownership with greater confidence.
ISteamClient	Interface to create a new steam instance or to connect to an existing steam instance, whether it's in a different process or is local.
ISteamController	Steam Controller support API (deprecated and replaced with ISteamInput)
ISteamFriends	Interface to access information about individual users and interact with the Steam Overlay.
ISteamGameCoordinator	Functions for sending and receiving messages from the Game Coordinator.
ISteamGameServer	Provides the core of the Steam Game Servers API.
ISteamGameServerStats	Functions to allow game servers to set stats and achievements on players.
ISteamHTMLSurface	Interface for rendering and interacting with HTML pages.
ISteamHTTP	A small and easy to use HTTP client to send and receive data from the web.
ISteamInput	Interface for supporting Xbox, PlayStation, Switch and Steam Controllers.
ISteamInventory	Steam Inventory query and manipulation API.
ISteamMatchmaking	Functions for clients to access matchmaking services, favorites, and to operate on game lobbies.
ISteamMatchmakingServers	Functions which provide access to the game server browser.
ISteamMusic	Functions to control music playback in the steam client.
ISteamNetworking	Networking functions for making connections and sending data between clients, traversing NATs when possible.
ISteamNetworkingSockets	Newer networking API. Higher performance API that relays data through the Valve network and protects player IP addresses.
ISteamNetworkingUtils	Misc networking utilities useful when using ISteamNetworkingSockets
ISteamRemotePlay	Functions for getting information about Steam Remote Play sessions.
ISteamRemoteStorage	Provides functions for reading, writing, and accessing files which can be stored remotely in the Steam Cloud.
ISteamScreenshots	Functions for adding screenshots to the user's screenshot library.
ISteamTimeline	Functions for adding events to the game recording timeline.
ISteamUGC	Functions to create, consume, and interact with the Steam Workshop.
ISteamUser	Functions for accessing and manipulating Steam user information.
ISteamUserStats	Provides functions for accessing and submitting stats, achievements, and leaderboards.
ISteamUtils	Interface which provides access to a range of miscellaneous utility functions.
ISteamVideo	Provides functions to interface with the Steam video and broadcasting platforms.
SteamEncryptedAppTicket	Utilities to decode/decrypt encrypted application tickets.
steam_api	Provides the core foundation to initialize and access the Steamworks API.
steam_gameserver	Provides the core foundation to initialize and access the Steamworks GameServer API.