diff --git a/src/config.py b/src/config.py
index e5f580e..b959a4e 100644
--- a/src/config.py
+++ b/src/config.py
@@ -84,6 +84,7 @@ class Settings(BaseSettings):
     # Only used when explicitly enabled and query complexity warrants it.
     grok_enabled: bool = False
     xai_api_key: str = ""
+    xai_base_url: str = "https://api.x.ai/v1"
     grok_default_model: str = "grok-3-fast"
     grok_max_sats_per_query: int = 200
     grok_free: bool = False  # Skip Lightning invoice when user has own API key
diff --git a/src/infrastructure/router/cascade.py b/src/infrastructure/router/cascade.py
index e9ec675..050a7c4 100644
--- a/src/infrastructure/router/cascade.py
+++ b/src/infrastructure/router/cascade.py
@@ -759,7 +759,7 @@ class CascadeRouter:
 
         client = openai.AsyncOpenAI(
             api_key=provider.api_key,
-            base_url=provider.base_url or "https://api.x.ai/v1",
+            base_url=provider.base_url or settings.xai_base_url,
             timeout=httpx.Timeout(300.0),
         )
 
diff --git a/src/timmy/backends.py b/src/timmy/backends.py
index 02a90db..2ec05ed 100644
--- a/src/timmy/backends.py
+++ b/src/timmy/backends.py
@@ -99,23 +99,27 @@ class GrokBackend:
 
     def _get_client(self):
         """Create OpenAI client configured for xAI endpoint."""
+        from config import settings
+
         import httpx
         from openai import OpenAI
 
         return OpenAI(
             api_key=self._api_key,
-            base_url="https://api.x.ai/v1",
+            base_url=settings.xai_base_url,
             timeout=httpx.Timeout(300.0),
         )
 
     async def _get_async_client(self):
         """Create async OpenAI client configured for xAI endpoint."""
+        from config import settings
+
         import httpx
         from openai import AsyncOpenAI
 
         return AsyncOpenAI(
             api_key=self._api_key,
-            base_url="https://api.x.ai/v1",
+            base_url=settings.xai_base_url,
             timeout=httpx.Timeout(300.0),
         )