diff --git a/packages/ragbits-chat/src/ragbits/chat/api.py b/packages/ragbits-chat/src/ragbits/chat/api.py
index e018538976..d1d4dee545 100644
--- a/packages/ragbits-chat/src/ragbits/chat/api.py
+++ b/packages/ragbits-chat/src/ragbits/chat/api.py
@@ -61,6 +61,7 @@ def __init__(
         debug_mode: bool = False,
         auth_backend: AuthenticationBackend | type[AuthenticationBackend] | str | None = None,
         theme_path: str | None = None,
+        frontend_base_url: str | None = None,
     ) -> None:
         """
         Initialize the RagbitsAPI.
@@ -73,6 +74,7 @@ def __init__(
             debug_mode: Flag enabling debug tools in the default UI
             auth_backend: Authentication backend for user authentication. If None, no authentication required.
             theme_path: Path to a JSON file containing HeroUI theme configuration from heroui.com/themes
+            frontend_base_url: Base URL used for redirects to the frontend. Defaults to the configured base URL.
         """
         self.chat_interface: ChatInterface = self._load_chat_interface(chat_interface)
         self.dist_dir = Path(ui_build_dir) if ui_build_dir else Path(__file__).parent / "ui-build"
@@ -81,7 +83,7 @@ def __init__(
         self.auth_backend = self._load_auth_backend(auth_backend)
         self.theme_path = Path(theme_path) if theme_path else None
 
-        self.frontend_base_url = BASE_URL
+        self.frontend_base_url = frontend_base_url if frontend_base_url is not None else BASE_URL
 
         @asynccontextmanager
         async def lifespan(app: FastAPI) -> AsyncGenerator[None, None]:
diff --git a/packages/ragbits-chat/tests/unit/test_api.py b/packages/ragbits-chat/tests/unit/test_api.py
index 86718b0930..66ce176f2a 100644
--- a/packages/ragbits-chat/tests/unit/test_api.py
+++ b/packages/ragbits-chat/tests/unit/test_api.py
@@ -463,3 +463,10 @@ def test_feedback_endpoint_unauthenticated(client: TestClient) -> None:
     assert response.status_code == 401
     data = response.json()
     assert data["detail"] == "Authentication required"
+
+
+def test_frontend_base_url_can_be_configured(mock_chat_interface: type[MockChatInterface]) -> None:
+    """RagbitsAPI accepts a frontend base URL for OAuth redirects."""
+    api = RagbitsAPI(mock_chat_interface, frontend_base_url="https://frontend.example")
+
+    assert api.frontend_base_url == "https://frontend.example"