> For the complete documentation index, see [llms.txt](https://help.citrusad.com/retail-media-interface/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.citrusad.com/retail-media-interface/partner/ja/partner-api-authentication/authenticating-requests.md).

# 認証リクエスト

Epsilon Retail Media APIリクエストの認証にユーザーキー方式を使用します。ユーザーキーは [ユーザーキーを取得する](/retail-media-interface/partner/ja/partner-api-authentication/getuserkey.md) APIを通じて取得することもでき、これはユーザー設定からユーザーキーを取得する代替方法として機能します。ユーザーキーの取得APIを使用すると、パートナーは有効なユーザー名とパスワードを提供することで認証キーを生成できます。

## ユーザーキー

において Epsilon Retail Media プラットフォームでは、広告主は**ユーザー設定**セクションで自分のユーザーキーを確認できます。このキーは**ユーザー**レベルで一意であり、 Epsilon Retail Media システムとの認証を管理するためにアプリケーションに統合できます。

<figure><img src="/files/BLjwgGM1lWMUKq3Eaj5V" alt="" width="100%"><figcaption></figcaption></figure>

{% hint style="warning" %}
このユーザーキーはチームを代表するものではなく、そのように取り扱うべきではありません。
{% endhint %}

### 認証フロー図

<figure><img src="/files/oRTCXNvMP17Ip4n1m058" alt="User key flow.png" width="100%"><figcaption></figcaption></figure>


---

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