# Epic Online Services (EOS)

**Canonical:** https://apis.io/apis/epic-games/epic-online-services/  
**Provider:** Epic Games — https://apis.io/providers/epic-games/  
**Base URL:** https://api.epicgames.dev  
**Documentation:** https://dev.epicgames.com/en-US/services/epic-online-services

Epic Online Services (EOS) is one of 14 APIs that [Epic Games](https://apis.io/providers/epic-games/) publishes on the [APIs.io](https://apis.io/) network. Tagged areas include Achievements, Anti-Cheat, EOS, Game Backend, and Identity. The published artifact set on APIs.io includes API documentation and a getting-started guide.

Epic Online Services is Epic's free cross-platform backend for games. EOS exposes both a native C/C++ SDK (with Unity, Unreal, and platform wrappers) and a set of REST web services covering identity (Epic Account Services, Connect, Auth), social (Friends, Presence, Blocklist), play (Lobby, Sessions, P2P, Voice), progression (Achievements, Stats, Leaderboards), storage (Player Data Storage, Title Storage), integrity (Anti-Cheat, Sanctions, Reports), and commerce (Ecom). All EOS APIs are gated behind an Epic developer organization, sandbox, and client credentials issued in the EOS Developer Portal.

## Machine-readable artifacts (7)

- **Portal** — https://dev.epicgames.com
- **Documentation** — https://dev.epicgames.com/docs/epic-online-services
- **GettingStarted** — https://dev.epicgames.com/docs/epic-online-services/eos-get-started
- **SDKs** — https://dev.epicgames.com/docs/epic-online-services/platform-sdks
- **WebAPI** — https://dev.epicgames.com/docs/web-api-ref
- **GraphQL** — https://raw.githubusercontent.com/api-evangelist/epic-games/refs/heads/main/graphql/epic-games-graphql.md
- **APIsJSON** — https://raw.githubusercontent.com/api-evangelist/epic-games/refs/heads/main/apis.yml

## Other Epic Games APIs (12)

- [Epic Account Services](https://apis.io/apis/epic-games/epic-account-services/)
- [Epic Games Store Publishing](https://apis.io/apis/epic-games/epic-games-store-publishing/)
- [Kids Web Services (KWS)](https://apis.io/apis/epic-games/kids-web-services/)
- [Unreal Engine (Pointer)](https://apis.io/apis/epic-games/unreal-engine-pointer/)
- [Epic Games Achievements API](https://apis.io/apis/epic-games/epic-games-achievements-api/)
- [Epic Games Auth API](https://apis.io/apis/epic-games/epic-games-auth-api/)
- [Epic Games Connect API](https://apis.io/apis/epic-games/epic-games-connect-api/)
- [Epic Games Ecom API](https://apis.io/apis/epic-games/epic-games-ecom-api/)
- [Epic Games Leaderboards API](https://apis.io/apis/epic-games/epic-games-leaderboards-api/)
- [Epic Games PlayerDataStorage API](https://apis.io/apis/epic-games/epic-games-playerdatastorage-api/)
- [Epic Games Sanctions API](https://apis.io/apis/epic-games/epic-games-sanctions-api/)
- [Epic Games Stats API](https://apis.io/apis/epic-games/epic-games-stats-api/)

## Tags

Achievements, Anti-Cheat, EOS, Game Backend, Identity, Lobby, Sessions, Voice

---

Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/epic-games/epic-online-services/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/epic-games/.