diff --git a/auth/auth.py b/auth/auth.py
index 71c7928..2b80720 100644
--- a/auth/auth.py
+++ b/auth/auth.py
@@ -1,10 +1,15 @@
 from __future__ import annotations
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, Dict, Union
 
+import aiohttp_jinja2
+from aiohttp import web
+from aiohttp.web_exceptions import HTTPFound
+from aiohttp_security import remember
 from aiopg.sa.engine import Engine
 from aiopg.sa.result import RowProxy
 from aiohttp.web import Application
 from aiohttp_security.abc import AbstractAuthorizationPolicy
+from dynaconf import settings
 from passlib.hash import sha256_crypt
 from sqlalchemy import and_, func, not_
 
@@ -14,6 +19,31 @@
     from typing import Optional
 
 
+async def get_login_context(error: str | None = None) -> Dict[str, Union[str | bool]]:
+    use_oauth = getattr(getattr(settings, 'OAUTH', None), 'IS_USED', False)
+    only_oauth = getattr(getattr(settings, 'OAUTH', None), 'ONLY_OAUTH', False)
+    oauth_sign_in_title = getattr(getattr(settings, 'OAUTH', None), 'SIGN_IN_TITLE', '')
+    context = {
+        'context': '',
+        'use_oauth': use_oauth,
+        'only_oauth': only_oauth,
+        'oauth_sign_in_title': oauth_sign_in_title,
+    }
+    if error:
+        context['error'] = error
+    return context
+
+
+async def oauth_on_login(request: web.Request, user_data: dict) -> web.Response:
+    await remember(request, HTTPFound('/zbs/switches'), 'admin')
+    return HTTPFound('/zbs/switches')
+
+
+@aiohttp_jinja2.template('users/login.html')
+async def oauth_on_error(request: web.Request) -> Dict[str, Union[str | bool]]:
+    return await get_login_context(error='OAUTH failed')
+
+
 async def check_credentials(db_engine: Engine, username: str, password: str) -> bool:
     """Производит аутентификацию пользователя."""
     async with db_engine.acquire() as conn:
diff --git a/auth/views.py b/auth/views.py
index 0c55027..497c403 100644
--- a/auth/views.py
+++ b/auth/views.py
@@ -1,14 +1,15 @@
 from __future__ import annotations
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, Union
 
 import aiohttp_jinja2
 from aiohttp.abc import StreamResponse
 from aiohttp.web import HTTPFound, View, Response
 from aiohttp_security import forget, remember
+from dynaconf import settings
 from marshmallow.exceptions import ValidationError
 from multidict import MultiDictProxy
 
-from auth.auth import check_credentials
+from auth.auth import check_credentials, get_login_context
 from auth.schemes import LoginPostRequestSchema
 
 if TYPE_CHECKING:
@@ -17,12 +18,16 @@
 
 class LoginView(View):
     @aiohttp_jinja2.template('users/login.html')
-    async def get(self, error: Optional[str] = None) -> Dict[str, str]:
-        return {'context': ''}
+    async def get(self, error: Optional[str] = None) -> Dict[str, Union[str | bool]]:
+        return await get_login_context()
 
     @aiohttp_jinja2.template('users/login.html')
-    async def error(self) -> Dict[str, str]:
-        return {'context': '', 'error': 'Authorization failed'}
+    async def error(self) -> Dict[str, Union[str | bool]]:
+        return await get_login_context('Authorization failed')
+
+    @aiohttp_jinja2.template('users/login.html')
+    async def only_oauth_error(self) -> Dict[str, Union[str | bool]]:
+        return await get_login_context('Classic login is forbidden')
 
     async def authorise(
         self, response_location: Response, login: str, password: str,
@@ -33,6 +38,9 @@ async def authorise(
         return await self.error()
 
     async def post(self) -> StreamResponse:
+        only_oauth = getattr(getattr(settings, 'OAUTH', None), 'ONLY_OAUTH', False)
+        if only_oauth:
+            return await self.only_oauth_error()
         response_location = HTTPFound('/zbs/switches')
         form_data = await self.request.post()
         validated_data = self.validate_form_data(form_data)
diff --git a/its_on/main.py b/its_on/main.py
index 037b3e1..de9cdf1 100644
--- a/its_on/main.py
+++ b/its_on/main.py
@@ -4,6 +4,7 @@
 import pathlib
 
 from aiohttp import web
+from aiohttp_oauth2 import oauth2_app
 from aiohttp_security import setup as setup_security
 from aiohttp_security import SessionIdentityPolicy
 import aiohttp_cors
@@ -16,7 +17,7 @@
 from dynaconf import settings
 import uvloop
 
-from auth.auth import DBAuthorizationPolicy
+from auth.auth import DBAuthorizationPolicy, oauth_on_login, oauth_on_error
 from its_on.cache import setup_cache
 from its_on.db_utils import init_pg, close_pg
 from its_on.middlewares import setup_middlewares
@@ -42,6 +43,20 @@ def init_app(
 ) -> web.Application:
     app = web.Application(loop=loop)
 
+    if settings.OAUTH.IS_USED:
+        app.add_subapp(
+            '/oauth/',
+            oauth2_app(
+                client_id=settings.OAUTH.CLIENT_ID,
+                client_secret=settings.OAUTH.CLIENT_SECRET,
+                authorize_url=settings.OAUTH.AUTHORIZE_URL,
+                token_url=settings.OAUTH.TOKEN_URL,
+                on_login=oauth_on_login,
+                on_error=oauth_on_error,
+                json_data=False,
+            ),
+        )
+
     app['config'] = settings
 
     if not redis_pool:
diff --git a/its_on/templates/users/login.html b/its_on/templates/users/login.html
index 22f55cc..8df268d 100644
--- a/its_on/templates/users/login.html
+++ b/its_on/templates/users/login.html
@@ -12,6 +12,7 @@
   <div class="container">
     <h2>ITS ON</h2>
     <br>
+  {%- if not only_oauth -%}
     <form class="form-horizontal" action="/zbs/login" method="post">
       <div class="form-group">
         <label class="control-label col-sm-2" for="email">Login:</label>
@@ -31,6 +32,12 @@ <h2>ITS ON</h2>
         </div>
       </div>
     </form>
+  {%- endif -%}
+  {%- if use_oauth -%}
+      <div class="form-group">
+        <a href="/oauth/auth" class="col-sm-offset-2 btn btn-default"> {{ oauth_sign_in_title }} </a>
+      </div>
+  {%- endif -%}
     {%- if error is defined -%}
     <div class="alert alert-danger" role="alert">{{ error }}</div>
     {%- endif -%}
diff --git a/requirements.txt b/requirements.txt
index 5eafd45..65df9cf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,6 +4,7 @@ aiohttp-cors==0.7.0
 aiohttp-jinja2==1.5.0
 aiohttp-security==0.4.0
 aiohttp-session==2.8.0
+aiohttp-oauth2==0.0.5
 aiodns==2.0.0
 aiopg==1.0.0
 aioredis==1.3.1
diff --git a/settings.yaml b/settings.yaml
index 21b18bb..dc01c3c 100644
--- a/settings.yaml
+++ b/settings.yaml
@@ -4,6 +4,14 @@ default:
   port: 8081
   database:
     dsn: postgresql://bestdoctor:bestdoctor@localhost:5432/its_on
+  oauth:
+    is_used: false
+    only_oauth: false
+    client_id: '@none'
+    client_secret: '@none'
+    authorize_url: '@none'
+    token_url: '@none'
+    sign_in_title: 'Sign in with "Bestdoctor ID"'
   enable_db_logging: false
   cache_url: redis://127.0.0.1:6379/1
   cache_ttl: 300