diff --git a/ui/homepage/app/api/askai/route.ts b/ui/homepage/app/api/askai/route.ts
index 20c4114..71f9987 100644
--- a/ui/homepage/app/api/askai/route.ts
+++ b/ui/homepage/app/api/askai/route.ts
@@ -1,8 +1,8 @@
-import { getServerServiceBaseUrl } from '@lib/serviceConfig'
+import { getInternalServerServiceBaseUrl } from '@lib/serviceConfig'
 
 export async function POST(req: Request) {
   const { question, history } = await req.json()
-  const apiBase = getServerServiceBaseUrl()
+  const apiBase = getInternalServerServiceBaseUrl()
   const res = await fetch(`${apiBase}/api/askai`, {
     method: 'POST',
     headers: { 'Content-Type': 'application/json' },
diff --git a/ui/homepage/app/api/rag/query/route.ts b/ui/homepage/app/api/rag/query/route.ts
index 3274d87..ebeaf6d 100644
--- a/ui/homepage/app/api/rag/query/route.ts
+++ b/ui/homepage/app/api/rag/query/route.ts
@@ -1,9 +1,9 @@
-import { getServerServiceBaseUrl } from '@lib/serviceConfig'
+import { getInternalServerServiceBaseUrl } from '@lib/serviceConfig'
 
 export async function POST(req: Request) {
   try {
     const { question, history } = await req.json()
-    const apiBase = getServerServiceBaseUrl()
+    const apiBase = getInternalServerServiceBaseUrl()
     const response = await fetch(`${apiBase}/api/rag/query`, {
       method: 'POST',
       headers: { 'Content-Type': 'application/json' },
diff --git a/ui/homepage/lib/serviceConfig.ts b/ui/homepage/lib/serviceConfig.ts
index 070d9aa..b63000c 100644
--- a/ui/homepage/lib/serviceConfig.ts
+++ b/ui/homepage/lib/serviceConfig.ts
@@ -69,6 +69,7 @@ type ServiceKey = keyof EnvironmentRuntimeConfig
 
 const FALLBACK_ACCOUNT_SERVICE_URL = 'http://localhost:8080'
 const FALLBACK_SERVER_SERVICE_URL = 'http://localhost:8090'
+const FALLBACK_SERVER_SERVICE_INTERNAL_URL = 'http://127.0.0.1:8090'
 
 const LOCAL_HOSTNAMES = new Set(['localhost', '127.0.0.1', '[::1]'])
 
@@ -199,6 +200,32 @@ export function getServerServiceBaseUrl(): string {
   return normalizeBaseUrl(configured ?? DEFAULT_SERVER_SERVICE_URL)
 }
 
+const SERVER_INTERNAL_URL_ENV_KEYS = [
+  'SERVER_SERVICE_INTERNAL_URL',
+  'SERVER_INTERNAL_URL',
+  'INTERNAL_SERVER_SERVICE_URL',
+] as const
+
+export function getInternalServerServiceBaseUrl(): string {
+  const configured = readEnvValue(...SERVER_INTERNAL_URL_ENV_KEYS)
+  if (configured) {
+    return normalizeBaseUrl(configured)
+  }
+
+  const external = getServerServiceBaseUrl()
+
+  try {
+    const parsed = new URL(external)
+    if (LOCAL_HOSTNAMES.has(parsed.hostname)) {
+      return normalizeBaseUrl(external)
+    }
+  } catch {
+    // Ignore parsing errors and fall back to the internal default below.
+  }
+
+  return normalizeBaseUrl(FALLBACK_SERVER_SERVICE_INTERNAL_URL)
+}
+
 export const serviceConfig = {
   account: {
     baseUrl: getAccountServiceBaseUrl(),