diff --git a/changelog.mdx b/changelog.mdx
index 73a152811..fa81bafbc 100644
--- a/changelog.mdx
+++ b/changelog.mdx
@@ -7,6 +7,14 @@ keywords: ["changelog", "API updates", "release notes", "what's new", "API chang
 
 To subscribe to updates, please [**“Turn on notifications”**](https://help.x.com/en/managing-your-account/notifications-on-mobile-devices#:~:text=In%20the%20top%20menu,%20you,you%20would%20like%20to%20receive) for [**@API**](https://x.com/api). You can also follow this changelog in your feed reader via the [**RSS feed**](https://docs.x.com/changelog/rss.xml).
 
+<Update label="Jul 24, 2026" description="X API v2">
+  ### Event payload reference for the X Activity API
+
+  Today, we published a new [Event payloads](/x-api/activity/event-payloads) reference for the [X Activity API](/x-api/activity/introduction) with sample JSON for every supported event type — posts, likes, follows, profile updates, chat, DMs, mutes, blocks, Spaces, news, and OAuth revokes.
+
+  Use it to model your webhook handlers and JSON deserialization against real, live-captured payloads before wiring up a subscription.
+</Update>
+
 <Update label="Jul 21, 2026" description="X API v2">
   ### Mute and block events for X Activity API
 
diff --git a/es/changelog.mdx b/es/changelog.mdx
index f8078cb12..c6aaa765a 100644
--- a/es/changelog.mdx
+++ b/es/changelog.mdx
@@ -7,6 +7,14 @@ keywords: ["registro de cambios", "actualizaciones de la API", "notas de la vers
 
 Para suscribirte a las actualizaciones, [**"Activa las notificaciones"**](https://help.x.com/en/managing-your-account/notifications-on-mobile-devices#:~:text=In%20the%20top%20menu,%20you,you%20would%20like%20to%20receive) para [**@API**](https://x.com/api). También puedes seguir este registro de cambios en tu lector de feeds mediante el [**feed RSS**](https://docs.x.com/changelog/rss.xml).
 
+<Update label="24 de julio de 2026" description="X API v2">
+  ### Referencia de payloads de eventos para la X Activity API
+
+  Hoy publicamos una nueva referencia de [payloads de eventos](/es/x-api/activity/event-payloads) para la [X Activity API](/es/x-api/activity/introduction) con JSON de ejemplo para todos los tipos de eventos admitidos: Posts, Me gusta, seguimientos, actualizaciones de perfil, chat, DMs, silencios, bloqueos, Spaces, noticias y revocaciones de OAuth.
+
+  Úsala para modelar tus manejadores de webhooks y la deserialización de JSON con payloads reales capturados en vivo antes de configurar una suscripción.
+</Update>
+
 <Update label="11 de junio de 2026" description="X API v2">
   ### Endpoints de borrador y publicación de Articles
 
diff --git a/ja/changelog.mdx b/ja/changelog.mdx
index c46353e1b..7fba76e93 100644
--- a/ja/changelog.mdx
+++ b/ja/changelog.mdx
@@ -7,6 +7,14 @@ keywords: ["変更履歴", "API 更新", "リリースノート", "新着情報"
 
 更新情報の通知を受け取るには、[**@API**](https://x.com/api) の [**「通知をオンにする」**](https://help.x.com/en/managing-your-account/notifications-on-mobile-devices#:~:text=In%20the%20top%20menu,%20you,you%20would%20like%20to%20receive) を有効にしてください。また、この変更履歴は [**RSS フィード**](https://docs.x.com/changelog/rss.xml)を使ってフィードリーダーで購読することもできます。
 
+<Update label="2026 年 7 月 24 日" description="X API v2">
+  ### X Activity API のイベントペイロードリファレンス
+
+  本日、[X Activity API](/ja/x-api/activity/introduction) の新しい[イベントペイロード](/ja/x-api/activity/event-payloads)リファレンスを公開しました。Post、いいね、フォロー、プロフィール更新、チャット、DM、ミュート、ブロック、Spaces、ニュース、OAuth の失効など、サポートされているすべてのイベントタイプのサンプル JSON を掲載しています。
+
+  サブスクリプションを設定する前に、実際にキャプチャしたペイロードを使って Webhook ハンドラーと JSON のデシリアライズをモデル化するのにご利用ください。
+</Update>
+
 <Update label="2026 年 6 月 11 日" description="X API v2">
   ### Articles のドラフトおよび公開エンドポイント
 
diff --git a/ko/changelog.mdx b/ko/changelog.mdx
index 29a6c76fa..226a3567b 100644
--- a/ko/changelog.mdx
+++ b/ko/changelog.mdx
@@ -7,6 +7,14 @@ keywords: ["변경 로그", "API 업데이트", "릴리스 노트", "새로운 
 
 업데이트를 구독하려면 [**@API**](https://x.com/api)의 [**"알림 켜기"**](https://help.x.com/en/managing-your-account/notifications-on-mobile-devices#:~:text=In%20the%20top%20menu,%20you,you%20would%20like%20to%20receive)를 활성화하세요. 또한 [**RSS 피드**](https://docs.x.com/changelog/rss.xml)를 통해 피드 리더에서 이 변경 로그를 구독할 수도 있습니다.
 
+<Update label="2026년 7월 24일" description="X API v2">
+  ### X Activity API 이벤트 페이로드 레퍼런스
+
+  오늘 [X Activity API](/ko/x-api/activity/introduction)의 새로운 [이벤트 페이로드](/ko/x-api/activity/event-payloads) 레퍼런스를 게시했습니다. Post, 좋아요, 팔로우, 프로필 업데이트, 채팅, DM, 뮤트, 차단, Spaces, 뉴스, OAuth 취소 등 지원되는 모든 이벤트 유형에 대한 샘플 JSON을 제공합니다.
+
+  구독을 연결하기 전에 실제로 캡처된 페이로드를 기준으로 웹훅 핸들러와 JSON 역직렬화를 설계하는 데 활용하세요.
+</Update>
+
 <Update label="2026년 6월 11일" description="X API v2">
   ### Articles 초안 작성 및 게시 엔드포인트
 
diff --git a/pt/changelog.mdx b/pt/changelog.mdx
index a636b9560..3c6a4b668 100644
--- a/pt/changelog.mdx
+++ b/pt/changelog.mdx
@@ -7,6 +7,14 @@ keywords: ["registro de alterações", "atualizações da API", "notas de versã
 
 Para se inscrever para receber atualizações, [**"Ative as notificações"**](https://help.x.com/en/managing-your-account/notifications-on-mobile-devices#:~:text=In%20the%20top%20menu,%20you,you%20would%20like%20to%20receive) para [**@API**](https://x.com/api). Você também pode acompanhar este registro de alterações no seu leitor de feeds por meio do [**feed RSS**](https://docs.x.com/changelog/rss.xml).
 
+<Update label="24 de julho de 2026" description="X API v2">
+  ### Referência de payloads de eventos para a X Activity API
+
+  Hoje publicamos uma nova referência de [payloads de eventos](/pt/x-api/activity/event-payloads) para a [X Activity API](/pt/x-api/activity/introduction) com JSON de exemplo para todos os tipos de evento suportados: Posts, curtidas, seguidas, atualizações de perfil, chat, DMs, silenciamentos, bloqueios, Spaces, notícias e revogações de OAuth.
+
+  Use-a para modelar seus handlers de webhook e a desserialização de JSON com payloads reais capturados ao vivo antes de configurar uma assinatura.
+</Update>
+
 <Update label="11 de junho de 2026" description="X API v2">
   ### Endpoints de rascunho e publicação de Articles