diff --git a/custom_components/opnsense/config_flow.py b/custom_components/opnsense/config_flow.py
index 43fe337..6e8feb3 100644
--- a/custom_components/opnsense/config_flow.py
+++ b/custom_components/opnsense/config_flow.py
@@ -77,7 +77,7 @@ class ConfigFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
     # when user submits has user_input
     async def async_step_user(self, user_input=None):
         """Handle the initial step."""
-        errors = {}
+        errors: Mapping[str, Any] = {}
         if user_input is not None:
             try:
                 name = user_input.get(CONF_NAME, False) or None
@@ -121,8 +121,10 @@ async def async_step_user(self, user_input=None):
                 except awesomeversion.exceptions.AwesomeVersionCompareException:
                     raise UnknownFirmware()
 
-                system_info: Mapping[str, Any] = await client.get_system_info()
+                if not await client.is_plugin_installed():
+                    raise PluginMissing()
 
+                system_info: Mapping[str, Any] = await client.get_system_info()
                 if name is None:
                     name: str = system_info.get("name") or "OPNsense"
 
@@ -146,6 +148,9 @@ async def async_step_user(self, user_input=None):
                 _LOGGER.error(
                     f"Missing Device Unique ID Error. {err.__class__.__qualname__}: {err}"
                 )
+            except PluginMissing:
+                errors["base"] = "plugin_missing"
+                _LOGGER.error("OPNsense Plugin Missing")
             except (aiohttp.InvalidURL, InvalidURL) as err:
                 errors["base"] = "invalid_url_format"
                 _LOGGER.error(f"InvalidURL Error. {err.__class__.__qualname__}: {err}")
@@ -424,3 +429,7 @@ class BelowMinFirmware(Exception):
 
 class UnknownFirmware(Exception):
     pass
+
+
+class PluginMissing(Exception):
+    pass
diff --git a/custom_components/opnsense/pyopnsense/__init__.py b/custom_components/opnsense/pyopnsense/__init__.py
index 413001c..9c875df 100644
--- a/custom_components/opnsense/pyopnsense/__init__.py
+++ b/custom_components/opnsense/pyopnsense/__init__.py
@@ -217,7 +217,7 @@ async def _exec_php(self, script) -> Mapping[str, Any]:
     @_log_errors
     async def get_host_firmware_version(self) -> None | str:
         firmware_info: Mapping[str, Any] | list = await self._get(
-            "/api/core/firmware/status"
+            "/api/core/firmware/info"
         )
         if not isinstance(firmware_info, Mapping):
             return None
@@ -226,6 +226,19 @@ async def get_host_firmware_version(self) -> None | str:
         self._firmware_version = firmware
         return firmware
 
+    async def is_plugin_installed(self) -> bool:
+        firmware_info: Mapping[str, Any] | list = await self._get(
+            "/api/core/firmware/info"
+        )
+        if not isinstance(firmware_info, Mapping) or not isinstance(
+            firmware_info.get("package"), list
+        ):
+            return False
+        for pkg in firmware_info.get("package"):
+            if pkg.get("name", None) == "os-homeassistant-maxit":
+                return True
+        return False
+
     async def _get_from_stream(self, path: str) -> Mapping[str, Any] | list:
         self._rest_api_query_count += 1
         url: str = f"{self._url}{path}"