diff --git a/tb_rest_client/rest_client_pe.py b/tb_rest_client/rest_client_pe.py
index 4c4440c2..f0cff6dc 100644
--- a/tb_rest_client/rest_client_pe.py
+++ b/tb_rest_client/rest_client_pe.py
@@ -37,6 +37,10 @@ def token_login(self, token, refresh_token=None):
         super(RestClientPE, self).token_login(token=token, refresh_token=refresh_token)
         self.__load_controllers()
 
+    def api_key_login(self, api_key: str):
+        super(RestClientPE, self).api_key_login(api_key=api_key)
+        self.__load_controllers()
+
     # Self Registration Controller
     def get_privacy_policy(self, ) -> str:
         return self.self_registration_controller.get_privacy_policy_using_get()
diff --git a/test/test_rest_client_pe_api_key_login.py b/test/test_rest_client_pe_api_key_login.py
new file mode 100644
index 00000000..775e46b6
--- /dev/null
+++ b/test/test_rest_client_pe_api_key_login.py
@@ -0,0 +1,38 @@
+#  Copyright 2026. ThingsBoard
+#
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+
+import unittest
+
+from tb_rest_client.api.api_ce.device_controller_api import DeviceControllerApi as CEDeviceControllerApi
+from tb_rest_client.api.api_pe.device_controller_api import DeviceControllerApi
+from tb_rest_client.api.api_pe.self_registration_controller_api import SelfRegistrationControllerApi
+from tb_rest_client.rest_client_pe import RestClientPE
+
+
+class RestClientPEApiKeyLoginTests(unittest.TestCase):
+
+    def test_api_key_login_loads_pe_controllers(self):
+        client = RestClientPE("http://localhost:8080")
+
+        client.api_key_login("test-api-key")
+
+        self.assertEqual("ApiKey", client.configuration.api_key_prefix["X-Authorization"])
+        self.assertEqual("test-api-key", client.configuration.api_key["X-Authorization"])
+        self.assertIsInstance(client.device_controller, DeviceControllerApi)
+        self.assertNotIsInstance(client.device_controller, CEDeviceControllerApi)
+        self.assertIsInstance(client.self_registration_controller, SelfRegistrationControllerApi)
+
+
+if __name__ == '__main__':
+    unittest.main()