diff --git a/app/connections.py b/app/connections.py
index f9fc041b..12e75472 100644
--- a/app/connections.py
+++ b/app/connections.py
@@ -45,6 +45,10 @@ class TestException(Exception):
     pass
 
 
+class HttpApiException(Exception):
+    pass
+
+
 def download_data(*, settings, download_type=DownloadType.ALL, callback=print):
     with FTP(host=settings.host, user=settings.user, passwd=settings.password) as ftp:
         ftp.encoding = "utf-8"
@@ -329,17 +333,30 @@ def test_ftp(host, port, user, password, timeout=5):
 
 
 def test_http(host, port, user, password, timeout=5, use_ssl=False, skip_message=False):
+    params = urlencode({"text": "Connection test", "type": 2, "timeout": timeout})
+    params = "statusinfo" if skip_message else "message?{}".format(params)
+    base_url = "http{}://{}:{}".format("s" if use_ssl else "", host, port)
+    # authentication
+    init_auth(user, password, base_url, use_ssl)
     try:
-        params = urlencode({"text": "Connection test", "type": 2, "timeout": timeout})
-        params = "statusinfo" if skip_message else "message?{}".format(params)
-        url = "http{}://{}:{}/api/".format("s" if use_ssl else "", host, port)
-        # authentication
-        init_auth(user, password, url, use_ssl)
-
-        with urlopen("{}{}".format(url, params), timeout=5) as f:
+        with urlopen("{}/api/{}".format(base_url, params), timeout=5) as f:
             return json.loads(f.read().decode("utf-8")).get("message", "")
+    except HTTPError as e:
+        if e.code == 404:
+            return test_api("{}/web/{}".format(base_url, params))
+        raise TestException(e)
+    except (RemoteDisconnected, URLError) as e:
+        raise TestException(e)
+
+
+def test_api(url):
+    """ Additional HTTP API compatibility test. """
+    try:
+        with urlopen(url, timeout=5) as f:
+            pass  # NOP
     except (RemoteDisconnected, URLError, HTTPError) as e:
         raise TestException(e)
+    raise HttpApiException("HTTP API is not supported yet for this receiver!")
 
 
 def init_auth(user, password, url, use_ssl=False):
diff --git a/app/ui/main_app_window.py b/app/ui/main_app_window.py
index 3406894a..ba900dd7 100644
--- a/app/ui/main_app_window.py
+++ b/app/ui/main_app_window.py
@@ -8,7 +8,7 @@ from gi.repository import GLib, Gio
 
 from app.commons import run_idle, log, run_task, run_with_delay, init_logger
 from app.connections import HttpAPI, HttpRequestType, download_data, DownloadType, upload_data, test_http, \
-    TestException
+    TestException, HttpApiException
 from app.eparser import get_blacklist, write_blacklist, parse_m3u
 from app.eparser import get_services, get_bouquets, write_bouquets, write_services, Bouquets, Bouquet, Service
 from app.eparser.ecommons import CAS, Flag, BouquetService
@@ -836,7 +836,7 @@ class Application(Gtk.Application):
                 host, port, user, password = opts.host, opts.http_port, opts.http_user, opts.http_password
                 try:
                     test_http(host, port, user, password, use_ssl=opts.http_use_ssl, skip_message=True)
-                except TestException:
+                except (TestException, HttpApiException):
                     use_http = False
 
             upload_data(settings=opts,
diff --git a/app/ui/settings_dialog.py b/app/ui/settings_dialog.py
index 52bb5be1..cf06e22c 100644
--- a/app/ui/settings_dialog.py
+++ b/app/ui/settings_dialog.py
@@ -3,7 +3,7 @@ from enum import Enum
 from pathlib import Path
 
 from app.commons import run_task, run_idle
-from app.connections import test_telnet, test_ftp, TestException, test_http
+from app.connections import test_telnet, test_ftp, TestException, test_http, HttpApiException
 from app.settings import SettingsType, Settings
 from app.ui.dialogs import show_dialog, DialogType
 from .main_helper import update_entry_data, scroll_to
@@ -271,6 +271,8 @@ class SettingsDialog:
             self.show_info_message(test_http(host, port, user, password, use_ssl=use_ssl), Gtk.MessageType.INFO)
         except TestException as e:
             self.show_info_message(str(e), Gtk.MessageType.ERROR)
+        except HttpApiException as e:
+            self.show_info_message(str(e), Gtk.MessageType.WARNING)
         finally:
             self.show_spinner(False)