diff --git a/pages/api/availability/_get.ts b/pages/api/availability/_get.ts
index 21450f005e..5289190c03 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.optional(),
+    userId: stringOrNumber,
     username: z.string().optional(),
     dateFrom: z.string(),
     dateTo: z.string(),
diff --git a/pages/api/availability/index.ts b/pages/api/availability/index.ts
index 0fe7836697..b0c4e223d5 100644
--- a/pages/api/availability/index.ts
+++ b/pages/api/availability/index.ts
@@ -1,5 +1,9 @@
 import { defaultHandler } from "@calcom/lib/server";
 
-export default defaultHandler({
-  GET: import("./_get"),
-});
+import { withMiddleware } from "@lib/helpers/withMiddleware";
+
+export default withMiddleware("HTTP_GET_OR_POST")(
+  defaultHandler({
+    GET: import("./_get"),
+  })
+);