diff --git a/decart/client.py b/decart/client.py
index d9ff075..fa7067c 100644
--- a/decart/client.py
+++ b/decart/client.py
@@ -25,7 +25,7 @@ class DecartClient:
     Args:
         api_key: Your Decart API key. Defaults to the DECART_API_KEY environment variable.
         base_url: API base URL for batch/process/queue endpoints (defaults to https://api.decart.ai)
-        realtime_base_url: WebSocket base URL for realtime streaming (defaults to wss://api3.decart.ai)
+        realtime_base_url: WebSocket base URL for realtime streaming (defaults to wss://api.decart.ai)
         integration: Optional integration identifier (e.g., "langchain/0.1.0")
 
     Example:
@@ -56,7 +56,7 @@ def __init__(
         self,
         api_key: Optional[str] = None,
         base_url: str = "https://api.decart.ai",
-        realtime_base_url: str = "wss://api3.decart.ai",
+        realtime_base_url: str = "wss://api.decart.ai",
         integration: Optional[str] = None,
     ) -> None:
         resolved_api_key = api_key or os.environ.get("DECART_API_KEY", "").strip() or None
diff --git a/tests/test_realtime_unit.py b/tests/test_realtime_unit.py
index 0cd8500..10800bd 100644
--- a/tests/test_realtime_unit.py
+++ b/tests/test_realtime_unit.py
@@ -194,7 +194,7 @@ async def test_realtime_connect_omits_speed_when_unset():
     url = await _connect_and_capture_url(model="lucy-2.5")
     assert "speed" not in url
     assert url == (
-        "wss://api3.decart.ai/v1/stream"
+        "wss://api.decart.ai/v1/stream"
         "?api_key=test-key&model=lucy-2.5&livekit_early_room_info=true"
     )
 
@@ -203,7 +203,7 @@ async def test_realtime_connect_omits_speed_when_unset():
 async def test_realtime_connect_appends_speed_fast():
     url = await _connect_and_capture_url(speed="fast", model="lucy-2.5")
     assert url == (
-        "wss://api3.decart.ai/v1/stream"
+        "wss://api.decart.ai/v1/stream"
         "?api_key=test-key&model=lucy-2.5&livekit_early_room_info=true&speed=fast"
     )
     assert url.count("speed=") == 1
@@ -743,13 +743,13 @@ def post(self, url, headers):
 
     with patch("decart.realtime.client.aiohttp.ClientSession", return_value=fake_session):
         room_info = await _fetch_watch_stream_credentials(
-            base_url="wss://api3.decart.ai",
+            base_url="wss://api.decart.ai",
             api_key="test-key",
             room_name="room-123",
         )
 
     assert fake_session.post_calls == [
-        ("https://api3.decart.ai/watch-stream/room-123", {"x-api-key": "test-key"})
+        ("https://api.decart.ai/watch-stream/room-123", {"x-api-key": "test-key"})
     ]
     assert room_info.livekit_url == "wss://livekit.example"
     assert room_info.session_id == "room-123"