diff --git a/be/src/main.ts b/be/src/main.ts
index b330ec4..aed5bdf 100644
--- a/be/src/main.ts
+++ b/be/src/main.ts
@@ -1,5 +1,5 @@
 import { fetchFromJellyfinApi } from "./jellyfinApiHelper.ts";
-import { readWishlistFromDisk, saveJfItemsToDisk } from "./fsHelper.ts";
+import { readWishlistFromDisk, saveJfItemsToDisk, saveWishlistToDisk } from "./fsHelper.ts";
 import { transformItems } from "./itemHelper.ts";
 import { app } from "./expressHelper.ts";
 
@@ -37,15 +37,17 @@ const run = async () => {
     }
   })
 
-  app.post("/add", (req, res) => {
+  app.post("/add", async (req, res) => {
     const { imdbId: requestedImdbId } = req.body;
+    const wishlistItems = await readWishlistFromDisk();
 
-    if (jellyfinExistingItems.includes(requestedImdbId)) {
-      res.send("DUP\n");
+    if (jellyfinExistingItems.includes(requestedImdbId)
+      || wishlistItems.includes(requestedImdbId)) {
+      res.json({ requestedImdbId, status: "REJECTED" });
     } else {
-      // to do: push to wishlist array
-      // to do: save wishlist array to disk
-      res.send("OK\n");
+      wishlistItems.push(requestedImdbId)
+      saveWishlistToDisk({ wishlistItems });
+      res.json({ requestedImdbId, status: "OK" });
     }
   })