diff --git a/lambda_agent_api/agent_api.py b/lambda_agent_api/agent_api.py
index d130bcf..e2e5346 100644
--- a/lambda_agent_api/agent_api.py
+++ b/lambda_agent_api/agent_api.py
@@ -2,6 +2,7 @@ import logging
 from typing import Callable, Optional, AsyncIterator
 import aiohttp
 import asyncio
+from urllib.parse import urljoin
 
 from lambda_agent_api.server import *
 from lambda_agent_api.client import *
@@ -27,10 +28,12 @@ class AgentApi:
         agent_id: str,
         url: str,
         callback: Optional[Callable[[ServerMessage], None]] = None,
-        on_disconnect: Optional[Callable[['AgentApi'], None]] = None
+        on_disconnect: Optional[Callable[['AgentApi'], None]] = None,
+        chat_id: int = 0    # значение по умолчанию для обратной совместимости
     ):
         self.id = agent_id  # ID агента для словаря
-        self.url = url
+        self.chat_id = chat_id
+        self.url = urljoin(url, f"{chat_id}/")
         self.callback = callback
         self.on_disconnect = on_disconnect
 
diff --git a/tests/manual.py b/tests/manual.py
index a39802b..b801a2d 100644
--- a/tests/manual.py
+++ b/tests/manual.py
@@ -7,7 +7,8 @@ from lambda_agent_api.server import MsgEventTextChunk, MsgEventToolCallChunk, Ms
 
 
 async def main():
-    api = AgentApi("agent-1", "ws://localhost:8000/agent_ws/")
+    chat_id = input("Chat id: ") or 0
+    api = AgentApi("agent-1", "ws://localhost:8000/agent_ws/", chat_id=chat_id)
 
     await api.connect()
     while True: