diff --git a/src/api/server_proxy.py b/src/api/server_proxy.py
index e46cd92..76ff675 100644
--- a/src/api/server_proxy.py
+++ b/src/api/server_proxy.py
@@ -20,6 +20,7 @@ categories = [RenderStatus.RUNNING, RenderStatus.WAITING_FOR_SUBJOBS, RenderStat
 
 logger = logging.getLogger()
 OFFLINE_MAX = 2
+LOOPBACK = '127.0.0.1'
 
 
 class RenderServerProxy:
@@ -34,6 +35,7 @@ class RenderServerProxy:
         self.__background_thread = None
         self.__offline_flags = 0
         self.update_cadence = 5
+        self.is_localhost = is_localhost(hostname)
 
         # Cache some basic server info
         self.system_cpu = None
@@ -75,7 +77,8 @@ class RenderServerProxy:
         return None
 
     def request(self, payload, timeout=5):
-        return requests.get(f'http://{self.hostname}:{self.port}/api/{payload}', timeout=timeout)
+        hostname = LOOPBACK if self.is_localhost else self.hostname
+        return requests.get(f'http://{hostname}:{self.port}/api/{payload}', timeout=timeout)
 
     def start_background_update(self):
         if self.__update_in_background:
@@ -140,15 +143,16 @@ class RenderServerProxy:
         return self.request_data('all_engines')
 
     def notify_parent_of_status_change(self, parent_id, subjob):
-        return requests.post(f'http://{self.hostname}:{self.port}/api/job/{parent_id}/notify_parent_of_status_change',
+        hostname = LOOPBACK if self.is_localhost else self.hostname
+        return requests.post(f'http://{hostname}:{self.port}/api/job/{parent_id}/notify_parent_of_status_change',
                              json=subjob.json())
 
     def post_job_to_server(self, file_path, job_list, callback=None):
 
         # bypass uploading file if posting to localhost
-        if is_localhost(self.hostname):
+        if self.is_localhost:
             jobs_with_path = [{**item, "local_path": file_path} for item in job_list]
-            return requests.post(f'http://{self.hostname}:{self.port}/api/add_job', data=json.dumps(jobs_with_path),
+            return requests.post(f'http://{LOOPBACK}:{self.port}/api/add_job', data=json.dumps(jobs_with_path),
                                      headers={'Content-Type': 'application/json'})
 
         # Prepare the form data
@@ -168,7 +172,8 @@ class RenderServerProxy:
         return requests.post(f'http://{self.hostname}:{self.port}/api/add_job', data=monitor, headers=headers)
 
     def get_job_files(self, job_id, save_path):
-        url = f"http://{self.hostname}:{self.port}/api/job/{job_id}/download_all"
+        hostname = LOOPBACK if self.is_localhost else self.hostname
+        url = f"http://{hostname}:{self.port}/api/job/{job_id}/download_all"
         return self.download_file(url, filename=save_path)
 
     @staticmethod
@@ -188,4 +193,5 @@ class RenderServerProxy:
 
     def delete_engine(self, engine, version, system_cpu=None):
         form_data = {'engine': engine, 'version': version, 'system_cpu': system_cpu}
-        return requests.post(f'http://{self.hostname}:{self.port}/api/delete_engine', json=form_data)
+        hostname = LOOPBACK if self.is_localhost else self.hostname
+        return requests.post(f'http://{hostname}:{self.port}/api/delete_engine', json=form_data)