diff --git a/app.py b/app.py
index 09a0936..cbca70c 100644
--- a/app.py
+++ b/app.py
@@ -1,13 +1,14 @@
 # app.py
 
 import os
+from typing import Any
 
-from sanic import Sanic
+from sanic import HTTPResponse, Sanic
 import sanic.response
 from sanic_ext import Config
 
 from api import api
-from config import openapi_title, openapi_version, openapi_description
+from config import openapi_title, openapi_version, openapi_description, hostnames
 
 from limiter import configure_limiter
 from auth import configure_auth
@@ -54,7 +55,7 @@ app.blueprint(api)
 # https://sanic.dev/en/guide/how-to/static-redirects.html
 
 
-def get_static_function(value):
+def get_static_function(value) -> Any:
     return lambda *_, **__: value
 
 
@@ -62,13 +63,20 @@ for src, dest in REDIRECTS.items():
     app.route(src)(get_static_function(sanic.response.redirect(dest)))
 
 
+@app.on_request
+async def domain_check(request) -> HTTPResponse:
+    print(request.host)
+    if request.host not in hostnames:
+        return sanic.response.redirect(f"https://api.revanced.app/{request.path}")
+
+
 @app.on_response
-async def add_cache_control(request, response):
+async def add_cache_control(_, response):
     response.headers["Cache-Control"] = "public, max-age=300"
 
 
 @app.on_response
-async def add_csp(request, response):
+async def add_csp(_, response):
     response.headers[
         "Content-Security-Policy"
     ] = "default-src  * 'unsafe-inline' 'unsafe-eval' data: blob:;"
diff --git a/config.py b/config.py
index ba48b2e..6ef3231 100644
--- a/config.py
+++ b/config.py
@@ -2,6 +2,12 @@
 
 backend: str = "github"
 redis: dict[str, str | int] = {"host": "localhost", "port": 6379}
+hostnames: list[str] = [
+    "api.revanced.app",
+    "deimos.revanced.app",
+    "localhost:8000",
+    "127.0.0.1:8000",
+]
 
 # GitHub Backend Configuration