diff --git a/packages/core/src/actor/mod.ts b/packages/core/src/actor/mod.ts
index a3c1d1698..3b5fb213e 100644
--- a/packages/core/src/actor/mod.ts
+++ b/packages/core/src/actor/mod.ts
@@ -6,7 +6,6 @@ import {
 } from "./config";
 import { ActorDefinition } from "./definition";
 
-
 export function actor<
 	S,
 	CP,
@@ -43,3 +42,4 @@ export type {
 	ActorContextOf,
 	ActionContextOf,
 } from "./definition";
+export { ALLOWED_PUBLIC_HEADERS} from "./router-endpoints";
diff --git a/packages/core/src/actor/router-endpoints.ts b/packages/core/src/actor/router-endpoints.ts
index 439a73a41..5548d6ed3 100644
--- a/packages/core/src/actor/router-endpoints.ts
+++ b/packages/core/src/actor/router-endpoints.ts
@@ -470,7 +470,9 @@ export const HEADER_CONN_TOKEN = "X-RivetKit-Conn-Token";
  *
  * Used for CORS.
  **/
-export const ALL_PUBLIC_HEADERS = [
+export const ALLOWED_PUBLIC_HEADERS = [
+	"Content-Type",
+	"User-Agent",
 	HEADER_ACTOR_QUERY,
 	HEADER_ENCODING,
 	HEADER_CONN_PARAMS,
diff --git a/packages/core/src/manager/router.ts b/packages/core/src/manager/router.ts
index 52146e735..eda17b81d 100644
--- a/packages/core/src/manager/router.ts
+++ b/packages/core/src/manager/router.ts
@@ -5,7 +5,7 @@ import type { Transport } from "@/actor/protocol/message/mod";
 import type { ToClient } from "@/actor/protocol/message/to-client";
 import { type Encoding, serialize } from "@/actor/protocol/serde";
 import {
-	ALL_PUBLIC_HEADERS,
+	ALLOWED_PUBLIC_HEADERS,
 	HEADER_ACTOR_ID,
 	HEADER_ACTOR_QUERY,
 	HEADER_AUTH_DATA,
@@ -137,7 +137,7 @@ export function createManagerRouter(
 				...corsConfig,
 				allowHeaders: [
 					...(corsConfig?.allowHeaders ?? []),
-					...ALL_PUBLIC_HEADERS,
+					...ALLOWED_PUBLIC_HEADERS,
 					"Content-Type",
 					"User-Agent",
 				],