diff --git a/frontend/src/lib/api.ts b/frontend/src/lib/api.ts
index b6c4304..422c43e 100644
--- a/frontend/src/lib/api.ts
+++ b/frontend/src/lib/api.ts
@@ -26,7 +26,16 @@ api.interceptors.response.use(
   async (error) => {
     const originalRequest = error.config;
 
-    if (error.response?.status === 401 && !originalRequest._retry) {
+    // Auth endpoints handle their own 401s (e.g. wrong credentials on the login
+    // form). Refreshing/redirecting here would reload the page and discard the
+    // error toast the caller is about to show.
+    const requestUrl: string = originalRequest?.url || '';
+    const isAuthEndpoint =
+      requestUrl.includes('/auth/login') ||
+      requestUrl.includes('/auth/register') ||
+      requestUrl.includes('/auth/refresh');
+
+    if (error.response?.status === 401 && !originalRequest._retry && !isAuthEndpoint) {
       originalRequest._retry = true;
 
       try {