diff --git a/api/src/chat/schemas/types/subscriberContext.ts b/api/src/chat/schemas/types/subscriberContext.ts
index 9eebff433..100c054de 100644
--- a/api/src/chat/schemas/types/subscriberContext.ts
+++ b/api/src/chat/schemas/types/subscriberContext.ts
@@ -1,11 +1,15 @@
 /*
- * Copyright © 2024 Hexastack. All rights reserved.
+ * Copyright © 2025 Hexastack. All rights reserved.
  *
  * Licensed under the GNU Affero General Public License v3.0 (AGPLv3) with the following additional terms:
  * 1. The name "Hexabot" is a trademark of Hexastack. You may not use this name in derivative works without express written permission.
  * 2. All derivative works must include clear attribution to the original creator and software, Hexastack and Hexabot, in a prominent location (e.g., in the software's "About" section, documentation, and README file).
  */
 
-export interface SubscriberContext {
-  vars?: { [key: string]: any };
-}
+import { z } from 'zod';
+
+export const subscriberContextSchema = z.object({
+  vars: z.record(z.any()).optional(),
+});
+
+export type SubscriberContext = z.infer<typeof subscriberContextSchema>;