diff --git a/requirements.txt b/requirements.txt
index 6f056cb..ab0638f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,4 +21,4 @@ psycopg2==2.9.7
 openai==0.27.8
 tiktoken==0.4.0
 google-search-results==2.4.2
-flake8==6.1.0
\ No newline at end of file
+flake8==6.1.0
diff --git a/src/app/flask_postgresql/configs.py b/src/app/flask_postgresql/configs.py
index 26ec6f5..33dfb52 100644
--- a/src/app/flask_postgresql/configs.py
+++ b/src/app/flask_postgresql/configs.py
@@ -24,7 +24,7 @@ class Config(object):
     SERVICE_PREFIX = os.environ.get("SERVICE_PREFIX", "")
     CHANNEL_SECRET = os.getenv("CHANNEL_SECRET", "")
     CHANNEL_ACCESS_TOKEN = os.getenv("CHANNEL_ACCESS_TOKEN", "")
-    PORT = os.getenv("PORT", 5000)
+    PORT = int(os.getenv("PORT", 5000))
     SERPAPI_API_KEY = os.getenv("SERPAPI_API_KEY", "")
     CHATBOT_DESCRIPTION = os.getenv("CHATBOT_DESCRIPTION", "")
     CHATBOT_LANGUAGE = os.getenv("CHATBOT_LANGUAGE", "")
diff --git a/src/infrastructure/tools/__init__.py b/src/infrastructure/tools/__init__.py
index f58f44b..87f3d5f 100644
--- a/src/infrastructure/tools/__init__.py
+++ b/src/infrastructure/tools/__init__.py
@@ -3,6 +3,7 @@
 
 from src.app.flask_postgresql.configs import Config
 
+from .google_calendar import GoogleCalendarTool
 from .stock import CurrentStockPriceTool, StockPerformanceTool
 
 # initialize LangChain services
@@ -16,4 +17,5 @@
     ),
     CurrentStockPriceTool(),
     StockPerformanceTool(),
+    GoogleCalendarTool(),
 ]
diff --git a/src/infrastructure/tools/google_calendar.py b/src/infrastructure/tools/google_calendar.py
new file mode 100644
index 0000000..d2dac2d
--- /dev/null
+++ b/src/infrastructure/tools/google_calendar.py
@@ -0,0 +1,70 @@
+import datetime
+import urllib
+from typing import Optional, Type
+
+from langchain.tools import BaseTool
+from pydantic import BaseModel, Field
+
+
+def create_gcal_url(
+    title="What?", date="20230524T180000/20230524T220000", location="Where?", description=""
+):
+    """
+    Generate a Google Calendar URL for creating a new event.
+
+    Args:
+        title (str): The title of the event. Defaults to "What?".
+        date (str): The date and time of the event in the format "yyyyMMddTHHmmss/yyyyMMddTHHmmss".
+                    Defaults to "20230524T180000/20230524T220000".
+        location (str): The location of the event. Defaults to "Where?".
+        description (str): The description of the event. Defaults to an empty string.
+
+    Returns:
+        str: The URL for creating a new event in Google Calendar.
+
+    """
+
+    base_url = "https://www.google.com/calendar/render?action=TEMPLATE"
+    event_url = f"{base_url}&text={urllib.parse.quote(title)}&dates={date}\
+            &location={urllib.parse.quote(location)}&details={urllib.parse.quote(description)}"
+
+    return event_url + "&openExternalBrowser=1"
+
+
+class GoogleCalendarGeneratorInput(BaseModel):
+    """Input for Google Calendar Generator."""
+
+    dates: str = Field(
+        ...,
+        description=f"Datetime symbol if text contained. format should be \
+        'YYYYMMDDTHHMMSS/YYYYMMDDTHHMMSS'. Current time is {datetime.date.today()}",
+    )
+    title: str = Field(..., description="Calendar Title symbol for reserve schedule.")
+    description: str = Field(
+        ..., description="Calendar Summary text symbol for schedule description."
+    )
+    location: str = Field(..., description="Calendar location symbol for reservation.")
+
+
+class GoogleCalendarTool(BaseTool):
+    name = "google_calendar_reservation"
+    description = "Generate Google Calendar url from user text first when containing time, date."
+    args_schema: Optional[Type[BaseModel]] = GoogleCalendarGeneratorInput
+
+    def _run(self, dates: str, title: str, description: str, location: str):
+        """
+        Generates a Google Calendar URL based on the given parameters.
+
+        Args:
+            dates (str): The dates of the event.
+            title (str): The title of the event.
+            description (str): The description of the event.
+            location (str): The location of the event.
+
+        Returns:
+            str: The generated Google Calendar URL.
+        """
+
+        result = create_gcal_url(title, dates, location, description)
+
+        return result