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Steam
Steam is Valve's PC gaming platform and digital distribution storefront. Valve exposes the Steamworks Web API at https://api.steampowered.com/ — a constellation of HTTP interfaces for games, players, friends, achievements, items, the economy, leaderboards, remote storage, and the Steam Workshop. A subset of read-only interfaces are public (with a Steam Web API key); the full Steamworks set requires a publisher account and partner-restricted methods. There is no per-call fee for the Steamworks Web API itself; Valve monetizes through a $100 Steam Direct submission fee per product and a revenue share on store sales.
Steam publishes 4 APIs on the APIs.io network, including IPlayerService API, ISteamNews API, ISteamUser API, and 1 more. Tagged areas include Gaming, Valve, Distribution, Steamworks, and Marketplace.
Steam’s developer surface includes authentication, documentation, API reference, getting-started guide, signup flow, engineering blog, and 24 more developer resources.
25 APIs
Gaming Valve Distribution Steamworks Marketplace Web API
On this page
Kin Score
APIs 25
Open Collections 1
Pricing Plans 1
Rate Limits 1
FinOps 1
Security Posture 2
Agentic Access 1
Resources 30
apis.yml
53 Operational Transparency
Composite quality — 45.8/100 · developing
Contract Quality
13.0 / 25
Developer Ergonomics
7.8 / 20
Commercial Clarity
12.6 / 20
Operational Transparency
6.8 / 13
Agent readiness — 31/100 · agent aware
Machine-Readable Contract
18 / 18
Agentic Access Contract
10 / 10
MCP Server
0 / 12
Machine-Readable Auth
10 / 10
Idempotency
0 / 9
Stable Error Semantics
0 / 8
Request/Response Examples
0 / 7
Rate-Limit Signaling
7 / 7
Typed Event Surface
0 / 6
Agent Skills
0 / 5
Well-Known Catalog
0 / 4
Consent & Bot Identity
0 / 3
A2A Agent Card
0 / 8
Dry-Run / Simulate Mode
0 / 4
Individual APIs this provider publishes, each with its own machine-readable definition.
ISteamNews exposes per-game news feeds via GetNewsForApp. Path pattern http://api.steampowered.com/ISteamNews//v/.
ISteamUserStats provides global achievement percentages, schema for game stats and achievements, and per-user achievement / stats retrieval (GetGlobalAchievementPercentagesForAp...
ISteamUser exposes player profile, friend list, and ban-status endpoints (GetPlayerSummaries, GetFriendList, GetPlayerBans, ResolveVanityURL).
ISteamUserAuth issues and validates Steam session tickets (AuthenticateUserTicket, AuthenticateUser) used by partner servers to verify a connecting player's Steam identity.
ISteamApps exposes catalog and server queries (GetAppList, GetServersAtAddress, UpToDateCheck) used to enumerate Steam applications and validate version state.
ISteamCommunity provides restricted access to Steam Community features (e.g., ReportAbuse) for trusted partners.
ISteamEconomy is a secondary economy-system interface (GetAssetClassInfo, GetAssetPrices, FinalizeAssetTransaction) used to look up asset metadata and pricing for in-game items.
IGameInventory is the primary inventory-economy interface used by partner servers to manipulate item ownership (AddItem, ConsumeItem, GetUserInventory, GetItemDefArchive).
IInventoryService is the modern Steam Inventory Service interface used to add/remove/exchange items, manage definitions, and query inventories at scale.
ISteamGameServer issues and manages persistent Game Server Login Tokens (GSLTs) used by dedicated game servers to authenticate to Steam.
ISteamRemoteStorage exposes Steam Cloud and UGC (user-generated content) storage endpoints — fetching files, retrieving UGC details, and listing published files.
ISteamLeaderboards manages per-app leaderboards — creation, score upload/reset, and entry retrieval.
IPlayerService exposes player-centric endpoints (GetOwnedGames, GetRecentlyPlayedGames, GetSteamLevel, GetBadges, IsPlayingSharedGame).
IGameNotificationsService delivers turn-based and prompt-style in-game notifications to players (UpdateNotificationSettings, UserCreateSession).
ISteamWebAPIUtil provides helper endpoints — GetServerInfo (Steam server time/version) and GetSupportedAPIList (interfaces and methods callable by the API key).
IPublishedFileService manages Steam Workshop / UGC published files — query, vote, change visibility, manage tags and previews.
IBroadcastService exposes Steam game-broadcast metadata and stream-discovery endpoints used for in-app broadcast lookups.
An unofficial-but-widely-used set of storefront endpoints (https://store.steampowered.com/api/) returns app details, package details, currency conversion, and feature lists. Use...
ISteamCheckout is the partner-only interface used to initiate, authorize, and finalize in-game microtransaction purchases through Steam Checkout.
ISteamMicroTxn / ISteamMicroTxnSandbox handle the full microtransaction lifecycle — InitTxn, FinalizeTxn, GetReport, RefundTxn, QueryTxn — used by F2P and live-service titles.
ISteamDeepLinkService creates and resolves time-limited deep links into the Steam client and store, useful for marketing campaigns and partner referrals.
The IPlayerService API from Steam — 3 operation(s) for iplayerservice.
The ISteamNews API from Steam — 1 operation(s) for isteamnews.
The ISteamUser API from Steam — 4 operation(s) for isteamuser.
The ISteamUserStats API from Steam — 3 operation(s) for isteamuserstats.
Scroll for all 25
Open, tool-agnostic API collections (OpenAPI-derived and Bruno).
Published pricing tiers and plan structures.
Documented rate limits and quota policies.
Cost, billing, and metering signals for API financial operations.
Authentication, domain security, vulnerability disclosure, and trust-center signals.
Recommended x-agentic-access execution contracts for AI agents.
Get Started 3
Portal, sign-up, and the first successful call
Documentation 5
Reference material describing how the API behaves
Agent Surfaces 1
MCP servers, agent skills, and machine-readable catalogs
Build 2
SDKs, sample code, and the tooling you integrate with
Access & Security 3
Authentication, authorization, and security posture
Operate 6
Status, limits, changes, and where to get help
Commercial 5
Pricing, plans, and the legal terms of use
Company 3
The organization behind the API
Other 2
Properties that don't map to a standard resource type
Source (apis.yml)
aid: steam
url: https://raw.githubusercontent.com/api-evangelist/steam/refs/heads/main/apis.yml
name: Steam
kind: company
description: Steam is Valve's PC gaming platform and digital distribution storefront. Valve exposes the Steamworks Web API
at https://api.steampowered.com/ — a constellation of HTTP interfaces for games, players, friends, achievements, items,
the economy, leaderboards, remote storage, and the Steam Workshop. A subset of read-only interfaces are public (with a Steam
Web API key); the full Steamworks set requires a publisher account and partner-restricted methods. There is no per-call
fee for the Steamworks Web API itself; Valve monetizes through a $100 Steam Direct submission fee per product and a revenue
share on store sales.
accessModel:
pricing: paid
onboarding: self-serve
trial: false
try_now: false
public: false
label: Paid · Self-serve signup
confidence: high
source:
- plans
- authentication
generated: '2026-07-22'
method: derived
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/steam.png
tags:
- Gaming
- Valve
- Distribution
- Steamworks
- Marketplace
- Web API
created: '2026-05-08'
modified: '2026-05-08'
specificationVersion: '0.19'
apis:
- aid: steam:steam-news-api
name: ISteamNews
tags:
- News
- Feeds
- Public
properties:
- url: https://steamcommunity.com/dev
type: Documentation
- url: https://partner.steamgames.com/doc/webapi
type: APIReference
description: ISteamNews exposes per-game news feeds via GetNewsForApp. Path pattern http://api.steampowered.com/ISteamNews/<method>/v<version>/.
- aid: steam:steam-user-stats-api
name: ISteamUserStats
tags:
- Stats
- Achievements
- Global Stats
- Schema
properties:
- url: https://partner.steamgames.com/doc/webapi/ISteamUserStats
type: APIReference
description: ISteamUserStats provides global achievement percentages, schema for game stats and achievements, and per-user
achievement / stats retrieval (GetGlobalAchievementPercentagesForApp, GetSchemaForGame, GetUserStatsForGame, GetPlayerAchievements,
etc.).
- aid: steam:steam-user-api
name: ISteamUser
tags:
- Users
- Profiles
- Friends
- Bans
properties:
- url: https://partner.steamgames.com/doc/webapi/ISteamUser
type: APIReference
description: ISteamUser exposes player profile, friend list, and ban-status endpoints (GetPlayerSummaries, GetFriendList,
GetPlayerBans, ResolveVanityURL).
- aid: steam:steam-user-auth-api
name: ISteamUserAuth
tags:
- Authentication
- Sessions
- Tickets
properties:
- url: https://partner.steamgames.com/doc/webapi/ISteamUserAuth
type: APIReference
description: ISteamUserAuth issues and validates Steam session tickets (AuthenticateUserTicket, AuthenticateUser) used by
partner servers to verify a connecting player's Steam identity.
- aid: steam:steam-apps-api
name: ISteamApps
tags:
- Apps
- Catalog
- Servers
properties:
- url: https://partner.steamgames.com/doc/webapi/ISteamApps
type: APIReference
description: ISteamApps exposes catalog and server queries (GetAppList, GetServersAtAddress, UpToDateCheck) used to enumerate
Steam applications and validate version state.
- aid: steam:steam-community-api
name: ISteamCommunity
tags:
- Community
- Reports
properties:
- url: https://partner.steamgames.com/doc/webapi/ISteamCommunity
type: APIReference
description: ISteamCommunity provides restricted access to Steam Community features (e.g., ReportAbuse) for trusted partners.
- aid: steam:steam-economy-api
name: ISteamEconomy
tags:
- Economy
- Trades
- Asset Class
properties:
- url: https://partner.steamgames.com/doc/webapi/ISteamEconomy
type: APIReference
description: ISteamEconomy is a secondary economy-system interface (GetAssetClassInfo, GetAssetPrices, FinalizeAssetTransaction)
used to look up asset metadata and pricing for in-game items.
- aid: steam:steam-game-inventory-api
name: IGameInventory
tags:
- Inventory
- Items
- Economy
properties:
- url: https://partner.steamgames.com/doc/webapi/IGameInventory
type: APIReference
description: IGameInventory is the primary inventory-economy interface used by partner servers to manipulate item ownership
(AddItem, ConsumeItem, GetUserInventory, GetItemDefArchive).
- aid: steam:steam-inventory-service-api
name: IInventoryService
tags:
- Inventory
- Items
- Service
properties:
- url: https://partner.steamgames.com/doc/webapi/IInventoryService
type: APIReference
description: IInventoryService is the modern Steam Inventory Service interface used to add/remove/exchange items, manage
definitions, and query inventories at scale.
- aid: steam:steam-game-server-api
name: ISteamGameServer
tags:
- Game Servers
- Sessions
- Login Tokens
properties:
- url: https://partner.steamgames.com/doc/webapi/ISteamGameServer
type: APIReference
description: ISteamGameServer issues and manages persistent Game Server Login Tokens (GSLTs) used by dedicated game servers
to authenticate to Steam.
- aid: steam:steam-remote-storage-api
name: ISteamRemoteStorage
tags:
- Remote Storage
- Cloud Saves
- UGC
properties:
- url: https://partner.steamgames.com/doc/webapi/ISteamRemoteStorage
type: APIReference
description: ISteamRemoteStorage exposes Steam Cloud and UGC (user-generated content) storage endpoints — fetching files,
retrieving UGC details, and listing published files.
- aid: steam:steam-leaderboards-api
name: ISteamLeaderboards
tags:
- Leaderboards
- Scores
properties:
- url: https://partner.steamgames.com/doc/webapi/ISteamLeaderboards
type: APIReference
description: ISteamLeaderboards manages per-app leaderboards — creation, score upload/reset, and entry retrieval.
- aid: steam:steam-player-service-api
name: IPlayerService
tags:
- Players
- Owned Games
- Recently Played
- Badges
properties:
- url: https://partner.steamgames.com/doc/webapi/IPlayerService
type: APIReference
description: IPlayerService exposes player-centric endpoints (GetOwnedGames, GetRecentlyPlayedGames, GetSteamLevel, GetBadges,
IsPlayingSharedGame).
- aid: steam:steam-game-notifications-api
name: IGameNotificationsService
tags:
- Notifications
- In-Game
properties:
- url: https://partner.steamgames.com/doc/webapi/IGameNotificationsService
type: APIReference
description: IGameNotificationsService delivers turn-based and prompt-style in-game notifications to players (UpdateNotificationSettings,
UserCreateSession).
- aid: steam:steam-webapi-util-api
name: ISteamWebAPIUtil
tags:
- Utility
- Server Info
- Schema
properties:
- url: https://partner.steamgames.com/doc/webapi/ISteamWebAPIUtil
type: APIReference
description: ISteamWebAPIUtil provides helper endpoints — GetServerInfo (Steam server time/version) and GetSupportedAPIList
(interfaces and methods callable by the API key).
- aid: steam:steam-publishedfile-api
name: IPublishedFileService
tags:
- Workshop
- UGC
- Published Files
properties:
- url: https://partner.steamgames.com/doc/webapi/IPublishedFileService
type: APIReference
description: IPublishedFileService manages Steam Workshop / UGC published files — query, vote, change visibility, manage
tags and previews.
- aid: steam:steam-broadcast-api
name: IBroadcastService
tags:
- Broadcast
- Streaming
- Game Live
properties:
- url: https://partner.steamgames.com/doc/webapi/IBroadcastService
type: APIReference
description: IBroadcastService exposes Steam game-broadcast metadata and stream-discovery endpoints used for in-app broadcast
lookups.
- aid: steam:steam-storefront-api
name: Steam Store API
tags:
- Store
- Pricing
- App Details
properties:
- url: https://store.steampowered.com/api/appdetails
type: APIReference
description: An unofficial-but-widely-used set of storefront endpoints (https://store.steampowered.com/api/) returns app
details, package details, currency conversion, and feature lists. Used by community sites and third-party catalogs.
- aid: steam:steam-checkout-api
name: ISteamCheckout
tags:
- Checkout
- In-Game Purchases
- Microtransactions
properties:
- url: https://partner.steamgames.com/doc/webapi/ISteamCheckout
type: APIReference
description: ISteamCheckout is the partner-only interface used to initiate, authorize, and finalize in-game microtransaction
purchases through Steam Checkout.
- aid: steam:steam-microtxn-api
name: ISteamMicroTxn
tags:
- Microtransactions
- Payments
- Refunds
properties:
- url: https://partner.steamgames.com/doc/webapi/ISteamMicroTxn
type: APIReference
description: ISteamMicroTxn / ISteamMicroTxnSandbox handle the full microtransaction lifecycle — InitTxn, FinalizeTxn, GetReport,
RefundTxn, QueryTxn — used by F2P and live-service titles.
- aid: steam:steam-deeplinkservice-api
name: ISteamDeepLinkService
tags:
- Deep Links
- Marketing
properties:
- url: https://partner.steamgames.com/doc/webapi/ISteamDeepLinkService
type: APIReference
description: ISteamDeepLinkService creates and resolves time-limited deep links into the Steam client and store, useful
for marketing campaigns and partner referrals.
- aid: steam:steam-iplayerservice-api
name: Steam IPlayerService API
description: The IPlayerService API from Steam — 3 operation(s) for iplayerservice.
tags:
- IPlayerService
properties:
- type: OpenAPI
url: openapi/steam-iplayerservice-api-openapi.yml
- aid: steam:steam-isteamnews-api
name: Steam ISteamNews API
description: The ISteamNews API from Steam — 1 operation(s) for isteamnews.
tags:
- ISteamNews
properties:
- type: OpenAPI
url: openapi/steam-isteamnews-api-openapi.yml
- aid: steam:steam-isteamuser-api
name: Steam ISteamUser API
description: The ISteamUser API from Steam — 4 operation(s) for isteamuser.
tags:
- ISteamUser
properties:
- type: OpenAPI
url: openapi/steam-isteamuser-api-openapi.yml
- aid: steam:steam-isteamuserstats-api
name: Steam ISteamUserStats API
description: The ISteamUserStats API from Steam — 3 operation(s) for isteamuserstats.
tags:
- ISteamUserStats
properties:
- type: OpenAPI
url: openapi/steam-isteamuserstats-api-openapi.yml
common:
- type: AgenticAccess
url: agentic-access/steam-agentic-access.yml
- type: DomainSecurity
url: security/steam-domain-security.yml
- type: Authentication
url: authentication/steam-authentication.yml
- type: GitHubOrganization
url: https://github.com/valvesoftware
- type: LinkedIn
url: https://www.linkedin.com/company/valvesoftware
- type: Website
url: https://store.steampowered.com/
- type: Documentation
url: https://partner.steamgames.com/doc/home
- type: APIReference
url: https://partner.steamgames.com/doc/webapi
- type: Public Web API Docs
url: https://steamcommunity.com/dev
- type: GettingStarted
url: https://partner.steamgames.com/doc/gettingstarted
- type: API Key Registration
url: https://steamcommunity.com/dev/apikey
- type: Steam Direct
url: https://partner.steamgames.com/steamdirect
- type: Steamworks SDK
url: https://partner.steamgames.com/doc/sdk
- type: Steam Workshop Docs
url: https://partner.steamgames.com/doc/features/workshop
- type: Signup
url: https://partner.steamgames.com/
- type: Login
url: https://store.steampowered.com/login/
- type: StatusPage
url: https://steamstat.us/
- type: Status (Official)
url: https://store.steampowered.com/stats/
- type: Steam Store
url: https://store.steampowered.com/
- type: Steam Community
url: https://steamcommunity.com/
- type: Steamworks Discord
url: https://discord.gg/steamworks
- type: Steamworks Documentation
url: https://partner.steamgames.com/doc
- type: PrivacyPolicy
url: https://store.steampowered.com/privacy_agreement/
- type: Subscriber Agreement
url: https://store.steampowered.com/subscriber_agreement/
- type: Steam Web API Terms of Use
url: https://steamcommunity.com/dev/apiterms
- type: Steamworks Forum
url: https://steamcommunity.com/groups/steamworks
- type: Plans
url: plans/steam-plans-pricing.yml
- type: RateLimits
url: rate-limits/steam-rate-limits.yml
- type: FinOps
url: finops/steam-finops.yml
- url: https://store.steampowered.com/feeds/news.xml
type: Blog
maintainers:
- FN: Kin Lane
email: kin@apievangelist.com