diff --git a/app/(chat)/api/chat/route.ts b/app/(chat)/api/chat/route.ts
index 604588ec1..11770c735 100644
--- a/app/(chat)/api/chat/route.ts
+++ b/app/(chat)/api/chat/route.ts
@@ -311,8 +311,10 @@ export async function POST(request: Request) {
 
   try {
     const json = await request.json();
+    console.log("[Chat API] Received request body:", JSON.stringify(json, null, 2));
     requestBody = postRequestBodySchema.parse(json);
-  } catch (_) {
+  } catch (error) {
+    console.error("[Chat API] Schema validation failed:", error);
     return new ChatSDKError("bad_request:api").toResponse();
   }