diff --git a/backend/package.json b/backend/package.json
index d07769d..e3d3af1 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "calendar-run-backend",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "private": true,
   "scripts": {
     "build": "tsc",
diff --git a/backend/src/app.ts b/backend/src/app.ts
index 484c433..56597ed 100644
--- a/backend/src/app.ts
+++ b/backend/src/app.ts
@@ -7,6 +7,25 @@ import racesRouter from "./routes/races";
 export function createApp(): express.Express {
   const app = express();
 
+  // TEMP: compare Host vs Origin for 200 vs 401 debugging — remove when done
+  app.use((req, res, next) => {
+    const host = req.headers.host;
+    const origin = req.headers.origin;
+    res.on("finish", () => {
+      console.log(
+        JSON.stringify({
+          tag: "temp-req-headers",
+          host,
+          origin: origin ?? null,
+          method: req.method,
+          path: req.originalUrl ?? req.url,
+          status: res.statusCode,
+        }),
+      );
+    });
+    next();
+  });
+
   app.use(
     cors({ origin: config.corsOrigin, methods: ["GET", "POST", "PATCH", "DELETE", "OPTIONS"] }),
   );