diff --git a/changelog/83_UNRELEASED_xxxx-xx-xx.md b/changelog/83_UNRELEASED_xxxx-xx-xx.md
index 3edda32b..2fa92cc0 100644
--- a/changelog/83_UNRELEASED_xxxx-xx-xx.md
+++ b/changelog/83_UNRELEASED_xxxx-xx-xx.md
@@ -54,4 +54,4 @@
 
 ### API
 
-- xxx
+- Fixed that API Key Authentication did not work when running Grocy in a subdirectory
diff --git a/middleware/Auth/BaseAuthMiddleware.php b/middleware/Auth/BaseAuthMiddleware.php
index 7e14b034..0d0c48b8 100644
--- a/middleware/Auth/BaseAuthMiddleware.php
+++ b/middleware/Auth/BaseAuthMiddleware.php
@@ -122,7 +122,7 @@ abstract class BaseAuthMiddleware extends BaseMiddleware
 
 	protected function IsApiRoute(Request $request): bool
 	{
-		return string_starts_with($request->getUri()->getPath(), '/api/');
+		return string_starts_with(RouteContext::fromRequest($request)->getRoute()->getPattern(), '/api/');
 	}
 
 	/**