diff --git a/devfront/src/features/clients/ClientDetailsPage.tsx b/devfront/src/features/clients/ClientDetailsPage.tsx
index d9487d72..0f2c50b0 100644
--- a/devfront/src/features/clients/ClientDetailsPage.tsx
+++ b/devfront/src/features/clients/ClientDetailsPage.tsx
@@ -39,6 +39,7 @@ import {
 import { t } from "../../lib/i18n";
 import { cn } from "../../lib/utils";
 import { ClientDetailTabs } from "./ClientDetailTabs";
+import { canDisplayClientSecret } from "./clientSecretPolicy";
 
 function ClientDetailsPage() {
   const params = useParams();
@@ -175,7 +176,6 @@ function ClientDetailsPage() {
   }
 
   const client = data?.client;
-  const isHeadlessLogin = client?.metadata?.headless_login_enabled === true;
   if (!client) {
     return null;
   }
@@ -214,21 +214,16 @@ function ClientDetailsPage() {
     },
   ];
 
-  const hasClientSecret = client.type === "private" && !isHeadlessLogin;
+  const hasClientSecret = canDisplayClientSecret(client);
   const secretPlaceholder = "SECRET_NOT_AVAILABLE";
   const clientSecret = hasClientSecret
     ? client?.clientSecret || secretPlaceholder
     : t("ui.common.na", "N/A");
   const displaySecret = !hasClientSecret
-    ? isHeadlessLogin
-      ? t(
-          "msg.dev.clients.details.secret_not_applicable_headless",
-          "이 앱은 Headless Login용 signed key 인증을 사용하므로 Client Secret을 사용하지 않습니다.",
-        )
-      : t(
-          "msg.dev.clients.details.secret_not_applicable",
-          "PKCE 앱에는 Client Secret이 없습니다.",
-        )
+    ? t(
+        "msg.dev.clients.details.secret_not_applicable",
+        "PKCE 앱에는 Client Secret이 없습니다.",
+      )
     : clientSecret === secretPlaceholder
       ? t("msg.dev.clients.details.secret_unavailable", "SECRET_NOT_AVAILABLE")
       : clientSecret;
@@ -400,15 +395,10 @@ function ClientDetailsPage() {
                   </div>
                   {!hasClientSecret ? (
                     <p className="mt-2 text-sm text-muted-foreground">
-                      {isHeadlessLogin
-                        ? t(
-                            "msg.dev.clients.details.secret_not_applicable_headless",
-                            "이 앱은 Headless Login용 signed key 인증을 사용하므로 Client Secret을 사용하지 않습니다.",
-                          )
-                        : t(
-                            "msg.dev.clients.details.secret_not_applicable",
-                            "PKCE 앱에는 Client Secret이 없습니다.",
-                          )}
+                      {t(
+                        "msg.dev.clients.details.secret_not_applicable",
+                        "PKCE 앱에는 Client Secret이 없습니다.",
+                      )}
                     </p>
                   ) : null}
                 </div>
diff --git a/devfront/src/features/clients/clientSecretPolicy.test.ts b/devfront/src/features/clients/clientSecretPolicy.test.ts
new file mode 100644
index 00000000..c273f530
--- /dev/null
+++ b/devfront/src/features/clients/clientSecretPolicy.test.ts
@@ -0,0 +1,28 @@
+import { describe, expect, it } from "vitest";
+import { canDisplayClientSecret } from "./clientSecretPolicy";
+
+describe("client secret policy", () => {
+  it("allows client secret display for server-side apps", () => {
+    expect(
+      canDisplayClientSecret({
+        type: "private",
+      }),
+    ).toBe(true);
+  });
+
+  it("still allows client secret display for server-side apps even when headless login is enabled in metadata", () => {
+    expect(
+      canDisplayClientSecret({
+        type: "private",
+      }),
+    ).toBe(true);
+  });
+
+  it("does not allow client secret display for PKCE apps", () => {
+    expect(
+      canDisplayClientSecret({
+        type: "pkce",
+      }),
+    ).toBe(false);
+  });
+});
diff --git a/devfront/src/features/clients/clientSecretPolicy.ts b/devfront/src/features/clients/clientSecretPolicy.ts
new file mode 100644
index 00000000..a2ccbf85
--- /dev/null
+++ b/devfront/src/features/clients/clientSecretPolicy.ts
@@ -0,0 +1,7 @@
+type ClientSecretPolicyTarget = {
+  type: string;
+};
+
+export function canDisplayClientSecret(client: ClientSecretPolicyTarget) {
+  return client.type === "private";
+}