diff --git a/src/main.py b/src/main.py
index 2c64f08..f85701c 100644
--- a/src/main.py
+++ b/src/main.py
@@ -74,7 +74,7 @@ class CalendarEvent(SQLModel):
     attendees: List[CalendarAttendees] | None = None
 
 
-@app.get('/calendar_events', response_model=List[CalendarEvent])
+@app.get('/calendar_events', response_model=List[CalendarEvent], tags=['Calendar'])
 def get_calendar_events(
         lower_bound: datetime = None,
         upper_bound: datetime = None,
@@ -114,7 +114,7 @@ def get_calendar_events(
     return events
 
 
-@app.post('/calendar_events')
+@app.post('/calendar_events', tags=['Calendar'])
 def create_calendar_event(calendar_event: CalendarEvent, service: Resource = Depends(get_calendar_service)):
     # Call the Calendar API
     now = datetime.utcnow().isoformat() + 'Z'  # 'Z' indicates UTC time
@@ -124,7 +124,7 @@ def create_calendar_event(calendar_event: CalendarEvent, service: Resource = Dep
     return calendar_event
 
 
-@app.post('/calendar_events/create_slots', response_model=List[CalendarEvent])
+@app.post('/calendar_events/create_slots', response_model=List[CalendarEvent], tags=['Calendar'])
 def create_calendar_slots(datetime_start: datetime, timezone: str, slot_length_minutes: int, count: int, service: Resource = Depends(get_calendar_service)):
     # Call the Calendar API
     events = []
@@ -151,7 +151,7 @@ def create_calendar_slots(datetime_start: datetime, timezone: str, slot_length_m
     return events
 
 
-@app.get('/calendar_events/free_slots', response_model=List[CalendarEvent])
+@app.get('/calendar_events/free_slots', response_model=List[CalendarEvent], tags=['Calendar'])
 def get_free_calendar_slots(
         lower_bound: datetime = None,
         upper_bound: datetime = None,
@@ -165,7 +165,7 @@ def get_free_calendar_slots(
     return free_slots
 
 
-@app.post('/calendar_events/mark_busy', response_model=CalendarEvent)
+@app.post('/calendar_events/mark_busy', response_model=CalendarEvent, tags=['Calendar'])
 def mark_busy_calendar_slot(
         description: str | None = None,
         lower_bound: datetime = None,
@@ -191,7 +191,7 @@ def mark_busy_calendar_slot(
     return event
 
 
-@app.get('/calendar_events/{slot_id}', response_model=CalendarEvent)
+@app.get('/calendar_events/{slot_id}', response_model=CalendarEvent, tags=['Calendar'])
 def get_slot_by_id(
         slot_id: str,
         service: Resource = Depends(get_calendar_service)
@@ -209,7 +209,7 @@ def get_slot_by_id(
     return event
 
 
-@app.post('/calendar_events/{slot_id}/mark_busy', response_model=CalendarEvent)
+@app.post('/calendar_events/{slot_id}/mark_busy', response_model=CalendarEvent, tags=['Calendar'])
 def mark_busy_calendar_slot_by_id(
         slot_id: str,
         description: str | None = None,
@@ -230,7 +230,7 @@ def mark_busy_calendar_slot_by_id(
     return event
 
 
-@app.post('/calendar_events/{slot_id}/mark_free', response_model=CalendarEvent)
+@app.post('/calendar_events/{slot_id}/mark_free', response_model=CalendarEvent, tags=['Calendar'])
 def mark_free_calendar_slot_by_id(
         slot_id: str,
         service: Resource = Depends(get_calendar_service)
@@ -246,7 +246,7 @@ def mark_free_calendar_slot_by_id(
     return event
 
 
-@app.post('/calendar_events/mark_free', response_model=CalendarEvent)
+@app.post('/calendar_events/mark_free', response_model=CalendarEvent, tags=['Calendar'])
 def mark_free_calendar_slot(
         lower_bound: datetime = None,
         upper_bound: datetime = None,
@@ -269,7 +269,7 @@ def mark_free_calendar_slot(
     return event
 
 
-@app.post('/calendar_events/mark_free/batch', response_model=List[CalendarEvent])
+@app.post('/calendar_events/mark_free/batch', response_model=List[CalendarEvent], tags=['Calendar'])
 def mark_free_calendar_slots(
         lower_bound: datetime = None,
         upper_bound: datetime = None,
@@ -352,7 +352,7 @@ class FormatDateResponse(BaseModel):
     now_delta_word: str | None = Field(schema_extra={'example': 'сегодня'})
 
 
-@app.post('/utils/date_format', response_model=FormatDateResponse)
+@app.post('/utils/date_format', response_model=FormatDateResponse, tags=['Utils'])
 async def format_date(input_date: FormatDateRequest):
     now = datetime.now()
     timestamp = input_date.date.timestamp()