diff --git a/ytnoti/__init__.py b/ytnoti/__init__.py
index 33d48ff..242ea61 100644
--- a/ytnoti/__init__.py
+++ b/ytnoti/__init__.py
@@ -81,6 +81,7 @@ def run(self,
         :param app: The FastAPI app to use. If not provided, a new app will be created.
         :param log_level: The log level to use for the uvicorn server.
         :param configs: Additional arguments to pass to the Config class of uvicorn.
+        :raises ValueError: If the given app instance has a route that conflicts with the notifier's routes.
         """
 
         server = super()._get_server(host=host, port=port, app=app, log_level=log_level, **configs)
@@ -182,6 +183,7 @@ async def serve(self,
         :param app: The FastAPI app instance to use. If not provided, a new instance will be created.
         :param configs: Additional arguments to pass to the Config class of uvicorn.
 
+        :raises ValueError: If the given app instance has a route that conflicts with the notifier's routes.
         :raises RuntimeError: If the method is not called from a running event loop.
         """
 
diff --git a/ytnoti/base.py b/ytnoti/base.py
index 92e7ecd..dc6809b 100644
--- a/ytnoti/base.py
+++ b/ytnoti/base.py
@@ -17,6 +17,8 @@
 from httpx import AsyncClient
 import xmltodict
 from fastapi import FastAPI, Request, Response, APIRouter
+from fastapi.routing import APIRoute
+from starlette.routing import Route
 from uvicorn import Config, Server
 from pyngrok import ngrok
 from pyexpat import ExpatError
@@ -296,6 +298,7 @@ def _get_server(self,
         :param log_level: The log level to use for the uvicorn server.
         :param configs: Additional arguments to pass to the server configuration.
         :return: The server instance.
+        :raises ValueError: If the given app instance has a route that conflicts with the notifier's routes.
         """
 
         self._config.host = host
@@ -307,6 +310,11 @@ def _get_server(self,
 
         self.__logger.info("Callback URL: %s", self._config.callback_url)
 
+        endpoint = urlparse(self._config.callback_url).path or "/"
+
+        if any(isinstance(route, (APIRoute, Route)) and route.path == endpoint for route in app.routes):
+            raise ValueError(f"Endpoint {endpoint} is reserved for {__package__} so it cannot be used by the app")
+
         self._config.app.include_router(self._get_router())
 
         async def on_ready():