diff --git a/simplylab/main.py b/simplylab/main.py
index 24a437c..914a79b 100644
--- a/simplylab/main.py
+++ b/simplylab/main.py
@@ -24,18 +24,19 @@ async def read_root():
 @app.post("/api/v1/get_ai_chat_response")
 async def get_ai_chat_response(req: GetAiChatResponseInput) -> GetAiChatResponseOutput:
     svc = Services(req)
-    response = await svc.chat.get_ai_chat_response(req)
-    res = GetAiChatResponseOutput(response=response)
+    res = await svc.chat.get_ai_chat_response(req)
     return res
 
 
 @app.post("/api/v1/get_user_chat_history")
 async def get_user_chat_history(req: GetUserChatHistoryInput) -> GetUserChatHistoryOutput:
-    res = [UserChatMessage(type="user", text="echo")]
+    svc = Services(req)
+    res = await svc.chat.get_user_chat_history(req)
     return res
 
 
 @app.post("/api/v1/get_chat_status_today")
 async def get_chat_status_today(req: GetChatStatusTodayInput) -> GetChatStatusTodayOutput:
-    res = GetChatStatusTodayOutput(user_name=req.user_name, chat_cnt=0)
+    svc = Services(req)
+    res = await svc.chat.get_chat_status_today(req)
     return res
diff --git a/simplylab/services/chat.py b/simplylab/services/chat.py
index d4c7886..8d3793c 100644
--- a/simplylab/services/chat.py
+++ b/simplylab/services/chat.py
@@ -1,6 +1,7 @@
 from typing import Any
 
-from simplylab.entity import GetAiChatResponseInput
+from simplylab.entity import GetAiChatResponseInput, GetUserChatHistoryInput, GetChatStatusTodayInput, UserChatMessage, \
+    GetChatStatusTodayOutput, GetAiChatResponseOutput, GetUserChatHistoryOutput
 from simplylab.providers import Providers
 
 
@@ -8,8 +9,17 @@ class ChatService:
     def __init__(self, ctx: Any):
         self.ctx = ctx
 
-    async def get_ai_chat_response(self, req: GetAiChatResponseInput) -> str:
+    async def get_ai_chat_response(self, req: GetAiChatResponseInput) -> GetAiChatResponseOutput:
         pvd = Providers()
         message = req.message
         response_content = await pvd.openrouter.chat(content=message)
-        return response_content
+        res = GetAiChatResponseOutput(response=response_content)
+        return res
+
+    async def get_user_chat_history(self, req: GetUserChatHistoryInput) -> GetUserChatHistoryOutput:
+        res = [UserChatMessage(type="user", text="echo")]
+        return res
+
+    async def get_chat_status_today(self, req: GetChatStatusTodayInput) -> GetChatStatusTodayOutput:
+        res = GetChatStatusTodayOutput(user_name=req.user_name, chat_cnt=0)
+        return res