diff --git a/pages/api/availability/_get.ts b/pages/api/availability/_get.ts
index 5289190c03..21450f005e 100644
--- a/pages/api/availability/_get.ts
+++ b/pages/api/availability/_get.ts
@@ -7,7 +7,7 @@ import { stringOrNumber } from "@calcom/prisma/zod-utils";
 
 const availabilitySchema = z
   .object({
-    userId: stringOrNumber,
+    userId: stringOrNumber.optional(),
     username: z.string().optional(),
     dateFrom: z.string(),
     dateTo: z.string(),