diff --git a/homeassistant/components/websocket_api/__init__.py b/homeassistant/components/websocket_api/__init__.py
index e7b10e18889..52158d3f1ad 100644
--- a/homeassistant/components/websocket_api/__init__.py
+++ b/homeassistant/components/websocket_api/__init__.py
@@ -1,11 +1,12 @@
 """WebSocket based API for Home Assistant."""
 from __future__ import annotations
 
-from typing import cast
+from typing import Final, cast
 
 import voluptuous as vol
 
 from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers.typing import ConfigType
 from homeassistant.loader import bind_hass
 
 from . import commands, connection, const, decorators, http, messages  # noqa: F401
@@ -34,11 +35,9 @@ from .messages import (  # noqa: F401
     result_message,
 )
 
-# mypy: allow-untyped-calls, allow-untyped-defs
+DOMAIN: Final = const.DOMAIN
 
-DOMAIN = const.DOMAIN
-
-DEPENDENCIES = ("http",)
+DEPENDENCIES: Final[tuple[str]] = ("http",)
 
 
 @bind_hass
@@ -53,8 +52,8 @@ def async_register_command(
     # pylint: disable=protected-access
     if handler is None:
         handler = cast(const.WebSocketCommandHandler, command_or_handler)
-        command = handler._ws_command  # type: ignore
-        schema = handler._ws_schema  # type: ignore
+        command = handler._ws_command  # type: ignore[attr-defined]
+        schema = handler._ws_schema  # type: ignore[attr-defined]
     else:
         command = command_or_handler
     handlers = hass.data.get(DOMAIN)
@@ -63,8 +62,8 @@ def async_register_command(
     handlers[command] = (handler, schema)
 
 
-async def async_setup(hass, config):
+async def async_setup(hass: HomeAssistant, config: ConfigType) -> bool:
     """Initialize the websocket API."""
-    hass.http.register_view(http.WebsocketAPIView)
+    hass.http.register_view(http.WebsocketAPIView())
     commands.async_register_commands(hass, async_register_command)
     return True
diff --git a/homeassistant/components/websocket_api/auth.py b/homeassistant/components/websocket_api/auth.py
index 3c795902900..130ffe82840 100644
--- a/homeassistant/components/websocket_api/auth.py
+++ b/homeassistant/components/websocket_api/auth.py
@@ -1,22 +1,31 @@
 """Handle the auth of a connection."""
+from __future__ import annotations
+
+from collections.abc import Callable
+from typing import TYPE_CHECKING, Any, Final
+
+from aiohttp.web import Request
 import voluptuous as vol
 from voluptuous.humanize import humanize_error
 
 from homeassistant.auth.models import RefreshToken, User
 from homeassistant.components.http.ban import process_success_login, process_wrong_login
 from homeassistant.const import __version__
+from homeassistant.core import HomeAssistant
 
 from .connection import ActiveConnection
 from .error import Disconnect
 
-# mypy: allow-untyped-calls, allow-untyped-defs
+if TYPE_CHECKING:
+    from .http import WebSocketAdapter
 
-TYPE_AUTH = "auth"
-TYPE_AUTH_INVALID = "auth_invalid"
-TYPE_AUTH_OK = "auth_ok"
-TYPE_AUTH_REQUIRED = "auth_required"
 
-AUTH_MESSAGE_SCHEMA = vol.Schema(
+TYPE_AUTH: Final = "auth"
+TYPE_AUTH_INVALID: Final = "auth_invalid"
+TYPE_AUTH_OK: Final = "auth_ok"
+TYPE_AUTH_REQUIRED: Final = "auth_required"
+
+AUTH_MESSAGE_SCHEMA: Final = vol.Schema(
     {
         vol.Required("type"): TYPE_AUTH,
         vol.Exclusive("api_password", "auth"): str,
@@ -25,17 +34,17 @@ AUTH_MESSAGE_SCHEMA = vol.Schema(
 )
 
 
-def auth_ok_message():
+def auth_ok_message() -> dict[str, str]:
     """Return an auth_ok message."""
     return {"type": TYPE_AUTH_OK, "ha_version": __version__}
 
 
-def auth_required_message():
+def auth_required_message() -> dict[str, str]:
     """Return an auth_required message."""
     return {"type": TYPE_AUTH_REQUIRED, "ha_version": __version__}
 
 
-def auth_invalid_message(message):
+def auth_invalid_message(message: str) -> dict[str, str]:
     """Return an auth_invalid message."""
     return {"type": TYPE_AUTH_INVALID, "message": message}
 
@@ -43,16 +52,20 @@ def auth_invalid_message(message):
 class AuthPhase:
     """Connection that requires client to authenticate first."""
 
-    def __init__(self, logger, hass, send_message, request):
+    def __init__(
+        self,
+        logger: WebSocketAdapter,
+        hass: HomeAssistant,
+        send_message: Callable[[str | dict[str, Any]], None],
+        request: Request,
+    ) -> None:
         """Initialize the authentiated connection."""
         self._hass = hass
         self._send_message = send_message
         self._logger = logger
         self._request = request
-        self._authenticated = False
-        self._connection = None
 
-    async def async_handle(self, msg):
+    async def async_handle(self, msg: dict[str, str]) -> ActiveConnection:
         """Handle authentication."""
         try:
             msg = AUTH_MESSAGE_SCHEMA(msg)
diff --git a/homeassistant/components/websocket_api/commands.py b/homeassistant/components/websocket_api/commands.py
index 53ff6d1da26..179fbcd1a30 100644
--- a/homeassistant/components/websocket_api/commands.py
+++ b/homeassistant/components/websocket_api/commands.py
@@ -1,6 +1,10 @@
 """Commands part of Websocket API."""
+from __future__ import annotations
+
 import asyncio
+from collections.abc import Callable
 import json
+from typing import Any
 
 import voluptuous as vol
 
@@ -8,7 +12,7 @@ from homeassistant.auth.permissions.const import CAT_ENTITIES, POLICY_READ
 from homeassistant.bootstrap import SIGNAL_BOOTSTRAP_INTEGRATONS
 from homeassistant.components.websocket_api.const import ERR_NOT_FOUND
 from homeassistant.const import EVENT_STATE_CHANGED, EVENT_TIME_CHANGED, MATCH_ALL
-from homeassistant.core import callback
+from homeassistant.core import Context, Event, HomeAssistant, callback
 from homeassistant.exceptions import (
     HomeAssistantError,
     ServiceNotFound,
@@ -17,19 +21,25 @@ from homeassistant.exceptions import (
 )
 from homeassistant.helpers import config_validation as cv, entity, template
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
-from homeassistant.helpers.event import TrackTemplate, async_track_template_result
+from homeassistant.helpers.event import (
+    TrackTemplate,
+    TrackTemplateResult,
+    async_track_template_result,
+)
 from homeassistant.helpers.json import ExtendedJSONEncoder
 from homeassistant.helpers.service import async_get_all_descriptions
 from homeassistant.loader import IntegrationNotFound, async_get_integration
 from homeassistant.setup import DATA_SETUP_TIME, async_get_loaded_integrations
 
 from . import const, decorators, messages
-
-# mypy: allow-untyped-calls, allow-untyped-defs
+from .connection import ActiveConnection
 
 
 @callback
-def async_register_commands(hass, async_reg):
+def async_register_commands(
+    hass: HomeAssistant,
+    async_reg: Callable[[HomeAssistant, const.WebSocketCommandHandler], None],
+) -> None:
     """Register commands."""
     async_reg(hass, handle_call_service)
     async_reg(hass, handle_entity_source)
@@ -49,7 +59,7 @@ def async_register_commands(hass, async_reg):
     async_reg(hass, handle_unsubscribe_events)
 
 
-def pong_message(iden):
+def pong_message(iden: int) -> dict[str, Any]:
     """Return a pong message."""
     return {"id": iden, "type": "pong"}
 
@@ -61,7 +71,9 @@ def pong_message(iden):
         vol.Optional("event_type", default=MATCH_ALL): str,
     }
 )
-def handle_subscribe_events(hass, connection, msg):
+def handle_subscribe_events(
+    hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+) -> None:
     """Handle subscribe events command."""
     # Circular dep
     # pylint: disable=import-outside-toplevel
@@ -75,7 +87,7 @@ def handle_subscribe_events(hass, connection, msg):
     if event_type == EVENT_STATE_CHANGED:
 
         @callback
-        def forward_events(event):
+        def forward_events(event: Event) -> None:
             """Forward state changed events to websocket."""
             if not connection.user.permissions.check_entity(
                 event.data["entity_id"], POLICY_READ
@@ -87,7 +99,7 @@ def handle_subscribe_events(hass, connection, msg):
     else:
 
         @callback
-        def forward_events(event):
+        def forward_events(event: Event) -> None:
             """Forward events to websocket."""
             if event.event_type == EVENT_TIME_CHANGED:
                 return
@@ -107,11 +119,13 @@ def handle_subscribe_events(hass, connection, msg):
         vol.Required("type"): "subscribe_bootstrap_integrations",
     }
 )
-def handle_subscribe_bootstrap_integrations(hass, connection, msg):
+def handle_subscribe_bootstrap_integrations(
+    hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+) -> None:
     """Handle subscribe bootstrap integrations command."""
 
     @callback
-    def forward_bootstrap_integrations(message):
+    def forward_bootstrap_integrations(message: dict[str, Any]) -> None:
         """Forward bootstrap integrations to websocket."""
         connection.send_message(messages.event_message(msg["id"], message))
 
@@ -129,7 +143,9 @@ def handle_subscribe_bootstrap_integrations(hass, connection, msg):
         vol.Required("subscription"): cv.positive_int,
     }
 )
-def handle_unsubscribe_events(hass, connection, msg):
+def handle_unsubscribe_events(
+    hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+) -> None:
     """Handle unsubscribe events command."""
     subscription = msg["subscription"]
 
@@ -154,7 +170,9 @@ def handle_unsubscribe_events(hass, connection, msg):
     }
 )
 @decorators.async_response
-async def handle_call_service(hass, connection, msg):
+async def handle_call_service(
+    hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+) -> None:
     """Handle call service command."""
     blocking = True
     # We do not support templates.
@@ -206,7 +224,9 @@ async def handle_call_service(hass, connection, msg):
 
 @callback
 @decorators.websocket_command({vol.Required("type"): "get_states"})
-def handle_get_states(hass, connection, msg):
+def handle_get_states(
+    hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+) -> None:
     """Handle get states command."""
     if connection.user.permissions.access_all_entities("read"):
         states = hass.states.async_all()
@@ -223,7 +243,9 @@ def handle_get_states(hass, connection, msg):
 
 @decorators.websocket_command({vol.Required("type"): "get_services"})
 @decorators.async_response
-async def handle_get_services(hass, connection, msg):
+async def handle_get_services(
+    hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+) -> None:
     """Handle get services command."""
     descriptions = await async_get_all_descriptions(hass)
     connection.send_message(messages.result_message(msg["id"], descriptions))
@@ -231,14 +253,18 @@ async def handle_get_services(hass, connection, msg):
 
 @callback
 @decorators.websocket_command({vol.Required("type"): "get_config"})
-def handle_get_config(hass, connection, msg):
+def handle_get_config(
+    hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+) -> None:
     """Handle get config command."""
     connection.send_message(messages.result_message(msg["id"], hass.config.as_dict()))
 
 
 @decorators.websocket_command({vol.Required("type"): "manifest/list"})
 @decorators.async_response
-async def handle_manifest_list(hass, connection, msg):
+async def handle_manifest_list(
+    hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+) -> None:
     """Handle integrations command."""
     loaded_integrations = async_get_loaded_integrations(hass)
     integrations = await asyncio.gather(
@@ -253,7 +279,9 @@ async def handle_manifest_list(hass, connection, msg):
     {vol.Required("type"): "manifest/get", vol.Required("integration"): str}
 )
 @decorators.async_response
-async def handle_manifest_get(hass, connection, msg):
+async def handle_manifest_get(
+    hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+) -> None:
     """Handle integrations command."""
     try:
         integration = await async_get_integration(hass, msg["integration"])
@@ -264,7 +292,9 @@ async def handle_manifest_get(hass, connection, msg):
 
 @decorators.websocket_command({vol.Required("type"): "integration/setup_info"})
 @decorators.async_response
-async def handle_integration_setup_info(hass, connection, msg):
+async def handle_integration_setup_info(
+    hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+) -> None:
     """Handle integrations command."""
     connection.send_result(
         msg["id"],
@@ -277,7 +307,9 @@ async def handle_integration_setup_info(hass, connection, msg):
 
 @callback
 @decorators.websocket_command({vol.Required("type"): "ping"})
-def handle_ping(hass, connection, msg):
+def handle_ping(
+    hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+) -> None:
     """Handle ping command."""
     connection.send_message(pong_message(msg["id"]))
 
@@ -293,10 +325,12 @@ def handle_ping(hass, connection, msg):
     }
 )
 @decorators.async_response
-async def handle_render_template(hass, connection, msg):
+async def handle_render_template(
+    hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+) -> None:
     """Handle render_template command."""
     template_str = msg["template"]
-    template_obj = template.Template(template_str, hass)
+    template_obj = template.Template(template_str, hass)  # type: ignore[no-untyped-call]
     variables = msg.get("variables")
     timeout = msg.get("timeout")
     info = None
@@ -319,7 +353,7 @@ async def handle_render_template(hass, connection, msg):
             return
 
     @callback
-    def _template_listener(event, updates):
+    def _template_listener(event: Event, updates: list[TrackTemplateResult]) -> None:
         nonlocal info
         track_template_result = updates.pop()
         result = track_template_result.result
@@ -329,7 +363,7 @@ async def handle_render_template(hass, connection, msg):
 
         connection.send_message(
             messages.event_message(
-                msg["id"], {"result": result, "listeners": info.listeners}  # type: ignore
+                msg["id"], {"result": result, "listeners": info.listeners}  # type: ignore[attr-defined]
             )
         )
 
@@ -356,7 +390,9 @@ async def handle_render_template(hass, connection, msg):
 @decorators.websocket_command(
     {vol.Required("type"): "entity/source", vol.Optional("entity_id"): [cv.entity_id]}
 )
-def handle_entity_source(hass, connection, msg):
+def handle_entity_source(
+    hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+) -> None:
     """Handle entity source command."""
     raw_sources = entity.entity_sources(hass)
     entity_perm = connection.user.permissions.check_entity
@@ -404,7 +440,9 @@ def handle_entity_source(hass, connection, msg):
 )
 @decorators.require_admin
 @decorators.async_response
-async def handle_subscribe_trigger(hass, connection, msg):
+async def handle_subscribe_trigger(
+    hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+) -> None:
     """Handle subscribe trigger command."""
     # Circular dep
     # pylint: disable=import-outside-toplevel
@@ -413,7 +451,9 @@ async def handle_subscribe_trigger(hass, connection, msg):
     trigger_config = await trigger.async_validate_trigger_config(hass, msg["trigger"])
 
     @callback
-    def forward_triggers(variables, context=None):
+    def forward_triggers(
+        variables: dict[str, Any], context: Context | None = None
+    ) -> None:
         """Forward events to websocket."""
         message = messages.event_message(
             msg["id"], {"variables": variables, "context": context}
@@ -449,7 +489,9 @@ async def handle_subscribe_trigger(hass, connection, msg):
 )
 @decorators.require_admin
 @decorators.async_response
-async def handle_test_condition(hass, connection, msg):
+async def handle_test_condition(
+    hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+) -> None:
     """Handle test condition command."""
     # Circular dep
     # pylint: disable=import-outside-toplevel
@@ -470,7 +512,9 @@ async def handle_test_condition(hass, connection, msg):
 )
 @decorators.require_admin
 @decorators.async_response
-async def handle_execute_script(hass, connection, msg):
+async def handle_execute_script(
+    hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+) -> None:
     """Handle execute script command."""
     # Circular dep
     # pylint: disable=import-outside-toplevel
diff --git a/homeassistant/components/websocket_api/connection.py b/homeassistant/components/websocket_api/connection.py
index 4e0ba257d59..62c21ef5894 100644
--- a/homeassistant/components/websocket_api/connection.py
+++ b/homeassistant/components/websocket_api/connection.py
@@ -3,48 +3,50 @@ from __future__ import annotations
 
 import asyncio
 from collections.abc import Hashable
-from typing import Any, Callable
+from typing import TYPE_CHECKING, Any, Callable
 
 import voluptuous as vol
 
-from homeassistant.core import Context, callback
+from homeassistant.auth.models import RefreshToken, User
+from homeassistant.core import Context, HomeAssistant, callback
 from homeassistant.exceptions import HomeAssistantError, Unauthorized
 
 from . import const, messages
 
-# mypy: allow-untyped-calls, allow-untyped-defs
+if TYPE_CHECKING:
+    from .http import WebSocketAdapter
 
 
 class ActiveConnection:
     """Handle an active websocket client connection."""
 
-    def __init__(self, logger, hass, send_message, user, refresh_token):
+    def __init__(
+        self,
+        logger: WebSocketAdapter,
+        hass: HomeAssistant,
+        send_message: Callable[[str | dict[str, Any]], None],
+        user: User,
+        refresh_token: RefreshToken,
+    ) -> None:
         """Initialize an active connection."""
         self.logger = logger
         self.hass = hass
         self.send_message = send_message
         self.user = user
-        if refresh_token:
-            self.refresh_token_id = refresh_token.id
-        else:
-            self.refresh_token_id = None
-
+        self.refresh_token_id = refresh_token.id
         self.subscriptions: dict[Hashable, Callable[[], Any]] = {}
         self.last_id = 0
 
-    def context(self, msg):
+    def context(self, msg: dict[str, Any]) -> Context:
         """Return a context."""
-        user = self.user
-        if user is None:
-            return Context()
-        return Context(user_id=user.id)
+        return Context(user_id=self.user.id)
 
     @callback
     def send_result(self, msg_id: int, result: Any | None = None) -> None:
         """Send a result message."""
         self.send_message(messages.result_message(msg_id, result))
 
-    async def send_big_result(self, msg_id, result):
+    async def send_big_result(self, msg_id: int, result: Any) -> None:
         """Send a result message that would be expensive to JSON serialize."""
         content = await self.hass.async_add_executor_job(
             const.JSON_DUMP, messages.result_message(msg_id, result)
@@ -57,7 +59,7 @@ class ActiveConnection:
         self.send_message(messages.error_message(msg_id, code, message))
 
     @callback
-    def async_handle(self, msg):
+    def async_handle(self, msg: dict[str, Any]) -> None:
         """Handle a single incoming message."""
         handlers = self.hass.data[const.DOMAIN]
 
@@ -102,13 +104,13 @@ class ActiveConnection:
         self.last_id = cur_id
 
     @callback
-    def async_close(self):
+    def async_close(self) -> None:
         """Close down connection."""
         for unsub in self.subscriptions.values():
             unsub()
 
     @callback
-    def async_handle_exception(self, msg, err):
+    def async_handle_exception(self, msg: dict[str, Any], err: Exception) -> None:
         """Handle an exception while processing a handler."""
         log_handler = self.logger.error
 
diff --git a/homeassistant/components/websocket_api/const.py b/homeassistant/components/websocket_api/const.py
index 7c3f18f856c..69716b97076 100644
--- a/homeassistant/components/websocket_api/const.py
+++ b/homeassistant/components/websocket_api/const.py
@@ -1,9 +1,11 @@
 """Websocket constants."""
+from __future__ import annotations
+
 import asyncio
 from concurrent import futures
 from functools import partial
 import json
-from typing import TYPE_CHECKING, Callable
+from typing import TYPE_CHECKING, Any, Awaitable, Callable, Dict, Final
 
 from homeassistant.core import HomeAssistant
 from homeassistant.helpers.json import JSONEncoder
@@ -12,37 +14,42 @@ if TYPE_CHECKING:
     from .connection import ActiveConnection
 
 
-WebSocketCommandHandler = Callable[[HomeAssistant, "ActiveConnection", dict], None]
+WebSocketCommandHandler = Callable[
+    [HomeAssistant, "ActiveConnection", Dict[str, Any]], None
+]
+AsyncWebSocketCommandHandler = Callable[
+    [HomeAssistant, "ActiveConnection", Dict[str, Any]], Awaitable[None]
+]
 
-DOMAIN = "websocket_api"
-URL = "/api/websocket"
-PENDING_MSG_PEAK = 512
-PENDING_MSG_PEAK_TIME = 5
-MAX_PENDING_MSG = 2048
+DOMAIN: Final = "websocket_api"
+URL: Final = "/api/websocket"
+PENDING_MSG_PEAK: Final = 512
+PENDING_MSG_PEAK_TIME: Final = 5
+MAX_PENDING_MSG: Final = 2048
 
-ERR_ID_REUSE = "id_reuse"
-ERR_INVALID_FORMAT = "invalid_format"
-ERR_NOT_FOUND = "not_found"
-ERR_NOT_SUPPORTED = "not_supported"
-ERR_HOME_ASSISTANT_ERROR = "home_assistant_error"
-ERR_UNKNOWN_COMMAND = "unknown_command"
-ERR_UNKNOWN_ERROR = "unknown_error"
-ERR_UNAUTHORIZED = "unauthorized"
-ERR_TIMEOUT = "timeout"
-ERR_TEMPLATE_ERROR = "template_error"
+ERR_ID_REUSE: Final = "id_reuse"
+ERR_INVALID_FORMAT: Final = "invalid_format"
+ERR_NOT_FOUND: Final = "not_found"
+ERR_NOT_SUPPORTED: Final = "not_supported"
+ERR_HOME_ASSISTANT_ERROR: Final = "home_assistant_error"
+ERR_UNKNOWN_COMMAND: Final = "unknown_command"
+ERR_UNKNOWN_ERROR: Final = "unknown_error"
+ERR_UNAUTHORIZED: Final = "unauthorized"
+ERR_TIMEOUT: Final = "timeout"
+ERR_TEMPLATE_ERROR: Final = "template_error"
 
-TYPE_RESULT = "result"
+TYPE_RESULT: Final = "result"
 
 # Define the possible errors that occur when connections are cancelled.
 # Originally, this was just asyncio.CancelledError, but issue #9546 showed
 # that futures.CancelledErrors can also occur in some situations.
-CANCELLATION_ERRORS = (asyncio.CancelledError, futures.CancelledError)
+CANCELLATION_ERRORS: Final = (asyncio.CancelledError, futures.CancelledError)
 
 # Event types
-SIGNAL_WEBSOCKET_CONNECTED = "websocket_connected"
-SIGNAL_WEBSOCKET_DISCONNECTED = "websocket_disconnected"
+SIGNAL_WEBSOCKET_CONNECTED: Final = "websocket_connected"
+SIGNAL_WEBSOCKET_DISCONNECTED: Final = "websocket_disconnected"
 
 # Data used to store the current connection list
-DATA_CONNECTIONS = f"{DOMAIN}.connections"
+DATA_CONNECTIONS: Final = f"{DOMAIN}.connections"
 
-JSON_DUMP = partial(json.dumps, cls=JSONEncoder, allow_nan=False)
+JSON_DUMP: Final = partial(json.dumps, cls=JSONEncoder, allow_nan=False)
diff --git a/homeassistant/components/websocket_api/decorators.py b/homeassistant/components/websocket_api/decorators.py
index cbb0e8563c5..af762cf2d46 100644
--- a/homeassistant/components/websocket_api/decorators.py
+++ b/homeassistant/components/websocket_api/decorators.py
@@ -2,9 +2,10 @@
 from __future__ import annotations
 
 import asyncio
-from collections.abc import Awaitable
 from functools import wraps
-from typing import Callable
+from typing import Any, Callable
+
+import voluptuous as vol
 
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.exceptions import Unauthorized
@@ -12,10 +13,13 @@ from homeassistant.exceptions import Unauthorized
 from . import const, messages
 from .connection import ActiveConnection
 
-# mypy: allow-untyped-calls, allow-untyped-defs
 
-
-async def _handle_async_response(func, hass, connection, msg):
+async def _handle_async_response(
+    func: const.AsyncWebSocketCommandHandler,
+    hass: HomeAssistant,
+    connection: ActiveConnection,
+    msg: dict[str, Any],
+) -> None:
     """Create a response and handle exception."""
     try:
         await func(hass, connection, msg)
@@ -24,13 +28,15 @@ async def _handle_async_response(func, hass, connection, msg):
 
 
 def async_response(
-    func: Callable[[HomeAssistant, ActiveConnection, dict], Awaitable[None]]
+    func: const.AsyncWebSocketCommandHandler,
 ) -> const.WebSocketCommandHandler:
     """Decorate an async function to handle WebSocket API messages."""
 
     @callback
     @wraps(func)
-    def schedule_handler(hass, connection, msg):
+    def schedule_handler(
+        hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+    ) -> None:
         """Schedule the handler."""
         # As the webserver is now started before the start
         # event we do not want to block for websocket responders
@@ -43,7 +49,9 @@ def require_admin(func: const.WebSocketCommandHandler) -> const.WebSocketCommand
     """Websocket decorator to require user to be an admin."""
 
     @wraps(func)
-    def with_admin(hass, connection, msg):
+    def with_admin(
+        hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+    ) -> None:
         """Check admin and call function."""
         user = connection.user
 
@@ -56,34 +64,32 @@ def require_admin(func: const.WebSocketCommandHandler) -> const.WebSocketCommand
 
 
 def ws_require_user(
-    only_owner=False,
-    only_system_user=False,
-    allow_system_user=True,
-    only_active_user=True,
-    only_inactive_user=False,
-):
+    only_owner: bool = False,
+    only_system_user: bool = False,
+    allow_system_user: bool = True,
+    only_active_user: bool = True,
+    only_inactive_user: bool = False,
+) -> Callable[[const.WebSocketCommandHandler], const.WebSocketCommandHandler]:
     """Decorate function validating login user exist in current WS connection.
 
     Will write out error message if not authenticated.
     """
 
-    def validator(func):
+    def validator(func: const.WebSocketCommandHandler) -> const.WebSocketCommandHandler:
         """Decorate func."""
 
         @wraps(func)
-        def check_current_user(hass, connection, msg):
+        def check_current_user(
+            hass: HomeAssistant, connection: ActiveConnection, msg: dict[str, Any]
+        ) -> None:
             """Check current user."""
 
-            def output_error(message_id, message):
+            def output_error(message_id: str, message: str) -> None:
                 """Output error message."""
                 connection.send_message(
                     messages.error_message(msg["id"], message_id, message)
                 )
 
-            if connection.user is None:
-                output_error("no_user", "Not authenticated as a user")
-                return
-
             if only_owner and not connection.user.is_owner:
                 output_error("only_owner", "Only allowed as owner")
                 return
@@ -112,16 +118,16 @@ def ws_require_user(
 
 
 def websocket_command(
-    schema: dict,
+    schema: dict[vol.Marker, Any],
 ) -> Callable[[const.WebSocketCommandHandler], const.WebSocketCommandHandler]:
     """Tag a function as a websocket command."""
     command = schema["type"]
 
-    def decorate(func):
+    def decorate(func: const.WebSocketCommandHandler) -> const.WebSocketCommandHandler:
         """Decorate ws command function."""
         # pylint: disable=protected-access
-        func._ws_schema = messages.BASE_COMMAND_MESSAGE_SCHEMA.extend(schema)
-        func._ws_command = command
+        func._ws_schema = messages.BASE_COMMAND_MESSAGE_SCHEMA.extend(schema)  # type: ignore[attr-defined]
+        func._ws_command = command  # type: ignore[attr-defined]
         return func
 
     return decorate
diff --git a/homeassistant/components/websocket_api/http.py b/homeassistant/components/websocket_api/http.py
index a84db598fdc..a80ff111f0d 100644
--- a/homeassistant/components/websocket_api/http.py
+++ b/homeassistant/components/websocket_api/http.py
@@ -2,15 +2,18 @@
 from __future__ import annotations
 
 import asyncio
+from collections.abc import Callable
 from contextlib import suppress
+import datetime as dt
 import logging
+from typing import Any, Final
 
 from aiohttp import WSMsgType, web
 import async_timeout
 
 from homeassistant.components.http import HomeAssistantView
 from homeassistant.const import EVENT_HOMEASSISTANT_STOP
-from homeassistant.core import callback
+from homeassistant.core import Event, HomeAssistant, callback
 from homeassistant.helpers.event import async_call_later
 
 from .auth import AuthPhase, auth_required_message
@@ -27,16 +30,15 @@ from .const import (
 from .error import Disconnect
 from .messages import message_to_json
 
-# mypy: allow-untyped-calls, allow-untyped-defs, no-check-untyped-defs
-_WS_LOGGER = logging.getLogger(f"{__name__}.connection")
+_WS_LOGGER: Final = logging.getLogger(f"{__name__}.connection")
 
 
 class WebsocketAPIView(HomeAssistantView):
     """View to serve a websockets endpoint."""
 
-    name = "websocketapi"
-    url = URL
-    requires_auth = False
+    name: str = "websocketapi"
+    url: str = URL
+    requires_auth: bool = False
 
     async def get(self, request: web.Request) -> web.WebSocketResponse:
         """Handle an incoming websocket connection."""
@@ -46,7 +48,7 @@ class WebsocketAPIView(HomeAssistantView):
 class WebSocketAdapter(logging.LoggerAdapter):
     """Add connection id to websocket messages."""
 
-    def process(self, msg, kwargs):
+    def process(self, msg: str, kwargs: Any) -> tuple[str, Any]:
         """Add connid to websocket log messages."""
         return f'[{self.extra["connid"]}] {msg}', kwargs
 
@@ -54,20 +56,21 @@ class WebSocketAdapter(logging.LoggerAdapter):
 class WebSocketHandler:
     """Handle an active websocket client connection."""
 
-    def __init__(self, hass, request):
+    def __init__(self, hass: HomeAssistant, request: web.Request) -> None:
         """Initialize an active connection."""
         self.hass = hass
         self.request = request
         self.wsock: web.WebSocketResponse | None = None
         self._to_write: asyncio.Queue = asyncio.Queue(maxsize=MAX_PENDING_MSG)
-        self._handle_task = None
-        self._writer_task = None
+        self._handle_task: asyncio.Task | None = None
+        self._writer_task: asyncio.Task | None = None
         self._logger = WebSocketAdapter(_WS_LOGGER, {"connid": id(self)})
-        self._peak_checker_unsub = None
+        self._peak_checker_unsub: Callable[[], None] | None = None
 
-    async def _writer(self):
+    async def _writer(self) -> None:
         """Write outgoing messages."""
         # Exceptions if Socket disconnected or cancelled by connection handler
+        assert self.wsock is not None
         with suppress(RuntimeError, ConnectionResetError, *CANCELLATION_ERRORS):
             while not self.wsock.closed:
                 message = await self._to_write.get()
@@ -78,12 +81,12 @@ class WebSocketHandler:
                 await self.wsock.send_str(message)
 
         # Clean up the peaker checker when we shut down the writer
-        if self._peak_checker_unsub:
+        if self._peak_checker_unsub is not None:
             self._peak_checker_unsub()
             self._peak_checker_unsub = None
 
     @callback
-    def _send_message(self, message):
+    def _send_message(self, message: str | dict[str, Any]) -> None:
         """Send a message to the client.
 
         Closes connection if the client is not reading the messages.
@@ -114,7 +117,7 @@ class WebSocketHandler:
             )
 
     @callback
-    def _check_write_peak(self, _):
+    def _check_write_peak(self, _utc_time: dt.datetime) -> None:
         """Check that we are no longer above the write peak."""
         self._peak_checker_unsub = None
 
@@ -129,10 +132,12 @@ class WebSocketHandler:
         self._cancel()
 
     @callback
-    def _cancel(self):
+    def _cancel(self) -> None:
         """Cancel the connection."""
-        self._handle_task.cancel()
-        self._writer_task.cancel()
+        if self._handle_task is not None:
+            self._handle_task.cancel()
+        if self._writer_task is not None:
+            self._writer_task.cancel()
 
     async def async_handle(self) -> web.WebSocketResponse:
         """Handle a websocket response."""
@@ -143,7 +148,7 @@ class WebSocketHandler:
         self._handle_task = asyncio.current_task()
 
         @callback
-        def handle_hass_stop(event):
+        def handle_hass_stop(event: Event) -> None:
             """Cancel this connection."""
             self._cancel()
 
diff --git a/homeassistant/components/websocket_api/messages.py b/homeassistant/components/websocket_api/messages.py
index 736a7ad59f0..8cdda3f8fa3 100644
--- a/homeassistant/components/websocket_api/messages.py
+++ b/homeassistant/components/websocket_api/messages.py
@@ -3,7 +3,7 @@ from __future__ import annotations
 
 from functools import lru_cache
 import logging
-from typing import Any
+from typing import Any, Final
 
 import voluptuous as vol
 
@@ -17,28 +17,27 @@ from homeassistant.util.yaml.loader import JSON_TYPE
 
 from . import const
 
-_LOGGER = logging.getLogger(__name__)
-# mypy: allow-untyped-defs
+_LOGGER: Final = logging.getLogger(__name__)
 
 # Minimal requirements of a message
-MINIMAL_MESSAGE_SCHEMA = vol.Schema(
+MINIMAL_MESSAGE_SCHEMA: Final = vol.Schema(
     {vol.Required("id"): cv.positive_int, vol.Required("type"): cv.string},
     extra=vol.ALLOW_EXTRA,
 )
 
 # Base schema to extend by message handlers
-BASE_COMMAND_MESSAGE_SCHEMA = vol.Schema({vol.Required("id"): cv.positive_int})
+BASE_COMMAND_MESSAGE_SCHEMA: Final = vol.Schema({vol.Required("id"): cv.positive_int})
 
-IDEN_TEMPLATE = "__IDEN__"
-IDEN_JSON_TEMPLATE = '"__IDEN__"'
+IDEN_TEMPLATE: Final = "__IDEN__"
+IDEN_JSON_TEMPLATE: Final = '"__IDEN__"'
 
 
-def result_message(iden: int, result: Any = None) -> dict:
+def result_message(iden: int, result: Any = None) -> dict[str, Any]:
     """Return a success result message."""
     return {"id": iden, "type": const.TYPE_RESULT, "success": True, "result": result}
 
 
-def error_message(iden: int, code: str, message: str) -> dict:
+def error_message(iden: int | None, code: str, message: str) -> dict[str, Any]:
     """Return an error result message."""
     return {
         "id": iden,
@@ -48,7 +47,7 @@ def error_message(iden: int, code: str, message: str) -> dict:
     }
 
 
-def event_message(iden: JSON_TYPE, event: Any) -> dict:
+def event_message(iden: JSON_TYPE, event: Any) -> dict[str, Any]:
     """Return an event message."""
     return {"id": iden, "type": "event", "event": event}
 
@@ -75,7 +74,7 @@ def _cached_event_message(event: Event) -> str:
     return message_to_json(event_message(IDEN_TEMPLATE, event))
 
 
-def message_to_json(message: Any) -> str:
+def message_to_json(message: dict[str, Any]) -> str:
     """Serialize a websocket message to json."""
     try:
         return const.JSON_DUMP(message)
diff --git a/homeassistant/components/websocket_api/permissions.py b/homeassistant/components/websocket_api/permissions.py
index 010a18f972c..5dade8eeb2a 100644
--- a/homeassistant/components/websocket_api/permissions.py
+++ b/homeassistant/components/websocket_api/permissions.py
@@ -2,6 +2,10 @@
 
 Separate file to avoid circular imports.
 """
+from __future__ import annotations
+
+from typing import Final
+
 from homeassistant.components.frontend import EVENT_PANELS_UPDATED
 from homeassistant.components.lovelace.const import EVENT_LOVELACE_UPDATED
 from homeassistant.components.persistent_notification import (
@@ -22,7 +26,7 @@ from homeassistant.helpers.entity_registry import EVENT_ENTITY_REGISTRY_UPDATED
 
 # These are events that do not contain any sensitive data
 # Except for state_changed, which is handled accordingly.
-SUBSCRIBE_ALLOWLIST = {
+SUBSCRIBE_ALLOWLIST: Final[set[str]] = {
     EVENT_AREA_REGISTRY_UPDATED,
     EVENT_COMPONENT_LOADED,
     EVENT_CORE_CONFIG_UPDATE,
diff --git a/homeassistant/components/websocket_api/sensor.py b/homeassistant/components/websocket_api/sensor.py
index dfcdc57842e..60d42e97604 100644
--- a/homeassistant/components/websocket_api/sensor.py
+++ b/homeassistant/components/websocket_api/sensor.py
@@ -1,7 +1,12 @@
 """Entity to track connections to websocket API."""
+from __future__ import annotations
+
+from typing import Any
 
 from homeassistant.components.sensor import SensorEntity
-from homeassistant.core import callback
+from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.typing import ConfigType
 
 from .const import (
     DATA_CONNECTIONS,
@@ -9,10 +14,13 @@ from .const import (
     SIGNAL_WEBSOCKET_DISCONNECTED,
 )
 
-# mypy: allow-untyped-calls, allow-untyped-defs, no-check-untyped-defs
 
-
-async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
+async def async_setup_platform(
+    hass: HomeAssistant,
+    config: ConfigType,
+    async_add_entities: AddEntitiesCallback,
+    discovery_info: dict[str, Any] | None = None,
+) -> None:
     """Set up the API streams platform."""
     entity = APICount()
 
@@ -22,11 +30,11 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
 class APICount(SensorEntity):
     """Entity to represent how many people are connected to the stream API."""
 
-    def __init__(self):
+    def __init__(self) -> None:
         """Initialize the API count."""
         self.count = 0
 
-    async def async_added_to_hass(self):
+    async def async_added_to_hass(self) -> None:
         """Added to hass."""
         self.async_on_remove(
             self.hass.helpers.dispatcher.async_dispatcher_connect(
@@ -40,21 +48,21 @@ class APICount(SensorEntity):
         )
 
     @property
-    def name(self):
+    def name(self) -> str:
         """Return name of entity."""
         return "Connected clients"
 
     @property
-    def state(self):
+    def state(self) -> int:
         """Return current API count."""
         return self.count
 
     @property
-    def unit_of_measurement(self):
+    def unit_of_measurement(self) -> str:
         """Return the unit of measurement."""
         return "clients"
 
     @callback
-    def _update_count(self):
+    def _update_count(self) -> None:
         self.count = self.hass.data.get(DATA_CONNECTIONS, 0)
         self.async_write_ha_state()
diff --git a/tests/components/websocket_api/test_connection.py b/tests/components/websocket_api/test_connection.py
index 55126ff1333..1d6bf5f2f6b 100644
--- a/tests/components/websocket_api/test_connection.py
+++ b/tests/components/websocket_api/test_connection.py
@@ -1,6 +1,7 @@
 """Test WebSocket Connection class."""
 import asyncio
 import logging
+from unittest.mock import Mock
 
 import voluptuous as vol
 
@@ -8,6 +9,8 @@ from homeassistant import exceptions
 from homeassistant.components import websocket_api
 from homeassistant.components.websocket_api import const
 
+from tests.common import MockUser
+
 
 async def test_send_big_result(hass, websocket_client):
     """Test sending big results over the WS."""
@@ -31,8 +34,10 @@ async def test_send_big_result(hass, websocket_client):
 async def test_exception_handling():
     """Test handling of exceptions."""
     send_messages = []
+    user = MockUser()
+    refresh_token = Mock()
     conn = websocket_api.ActiveConnection(
-        logging.getLogger(__name__), None, send_messages.append, None, None
+        logging.getLogger(__name__), None, send_messages.append, user, refresh_token
     )
 
     for (exc, code, err) in (