diff --git a/.strict-typing b/.strict-typing
index 9ab2d535f0fac2..a7758750d5e9e4 100644
--- a/.strict-typing
+++ b/.strict-typing
@@ -77,6 +77,7 @@ homeassistant.components.anova.*
 homeassistant.components.anthemav.*
 homeassistant.components.apache_kafka.*
 homeassistant.components.apcupsd.*
+homeassistant.components.api.*
 homeassistant.components.apprise.*
 homeassistant.components.aprs.*
 homeassistant.components.aqualogic.*
diff --git a/homeassistant/components/api/__init__.py b/homeassistant/components/api/__init__.py
index 8a5e1f0b0e0d15..048837dae68042 100644
--- a/homeassistant/components/api/__init__.py
+++ b/homeassistant/components/api/__init__.py
@@ -433,7 +433,7 @@ def get(self, request: web.Request) -> web.Response:
 
 
 @lru_cache
-def _cached_template(template_str: str, hass: ha.HomeAssistant) -> template.Template:
+def _cached_template(template_str: str, hass: HomeAssistant) -> template.Template:
     """Return a cached template."""
     return template.Template(template_str, hass)
 
@@ -450,7 +450,7 @@ async def post(self, request: web.Request) -> web.Response:
         try:
             data = await request.json()
             tpl = _cached_template(data["template"], request.app["hass"])
-            return tpl.async_render(variables=data.get("variables"), parse_result=False)
+            return tpl.async_render(variables=data.get("variables"), parse_result=False)  # type: ignore[no-any-return]
         except (ValueError, TemplateError) as ex:
             return self.json_message(
                 f"Error rendering template: {ex}", HTTPStatus.BAD_REQUEST
diff --git a/mypy.ini b/mypy.ini
index bfeaa28ef04130..163be50e6eb0c3 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -530,6 +530,16 @@ disallow_untyped_defs = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.api.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.apprise.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true