diff --git a/datacenter/hooks/useAgentChat.ts b/datacenter/hooks/useAgentChat.ts
index d9c734e20..f14f72b05 100644
--- a/datacenter/hooks/useAgentChat.ts
+++ b/datacenter/hooks/useAgentChat.ts
@@ -49,7 +49,7 @@ import { useDialogueContext } from '@/app/context/dialogue';
         const ctrl = new AbortController();
         let buffer = '';
   
-        await fetchEventSource(`${process.env.API_BASE_URL + "/api" + queryAgentURL}`, {
+        await fetchEventSource(`${process.env.API_BASE_URL ? process.env.API_BASE_URL : ''}${"/api" + queryAgentURL}`, {
           method: 'POST',
           headers: {
             'Content-Type': 'application/json',