diff --git a/src/user-profile/category-routes.ts b/src/user-profile/category-routes.ts
index f74c7b7..92c9436 100644
--- a/src/user-profile/category-routes.ts
+++ b/src/user-profile/category-routes.ts
@@ -71,7 +71,8 @@ categoryRoutes.post('/add/', jwtAuthentication, async (request, response) => {
             }
         });
         
-        response.sendStatus(200);
+        response.send(200);
+        response.send(newCategory.insertedId.toHexString());
     } catch(e) {
         response.sendStatus(500);
         return;
diff --git a/src/user-profile/shelf-routes.ts b/src/user-profile/shelf-routes.ts
index d6d29d6..98d1813 100644
--- a/src/user-profile/shelf-routes.ts
+++ b/src/user-profile/shelf-routes.ts
@@ -87,7 +87,8 @@ shelfRoutes.post('/add/', jwtAuthentication, async (request, response) => {
     });
 
     if (updatedCategory) {
-        response.sendStatus(200);
+        response.status(200);
+        response.send(newShelf.insertedId);
     } else {
         response.sendStatus(500);
     }