diff --git a/hassio/__main__.py b/hassio/__main__.py
index 788ab64e2..01d82b714 100644
--- a/hassio/__main__.py
+++ b/hassio/__main__.py
@@ -23,7 +23,7 @@ if __name__ == "__main__":
     loop.run_until_complete(hassio.setup())
 
     _LOGGER.info("Start Hassio task")
-    loop.create_task(hassio.start())
+    loop.call_soon_threadsafe(asyncio.ensure_future, hassio.start(), loop)
 
     try:
         loop.add_signal_handler(
@@ -32,4 +32,5 @@ if __name__ == "__main__":
         _LOGGER.warning("Could not bind to SIGTERM")
 
     loop.run_forever()
+    loop.close()
     _LOGGER.info("Close Hassio")
diff --git a/hassio/api/__init__.py b/hassio/api/__init__.py
index cde4ae8ef..1bd0d577a 100644
--- a/hassio/api/__init__.py
+++ b/hassio/api/__init__.py
@@ -44,6 +44,7 @@ class RestAPI(object):
         """Register supervisor function."""
         api_supervisor = APISupervisor(self.config, self.loop, host_controll)
 
+        self.webapp.router.add_get('/supervisor/ping', api_supervisor.ping)
         self.webapp.router.add_get('/supervisor/info', api_supervisor.info)
         self.webapp.router.add_get('/supervisor/update', api_supervisor.update)
         self.webapp.router.add_get(
diff --git a/hassio/api/homeassistant.py b/hassio/api/homeassistant.py
index f4ad3841f..cd55a2453 100644
--- a/hassio/api/homeassistant.py
+++ b/hassio/api/homeassistant.py
@@ -2,11 +2,17 @@
 import asyncio
 import logging
 
-from .util import api_process, json_loads
+import voluptuous as vol
+
+from .util import api_process, api_validate
 from ..const import ATTR_VERSION, ATTR_CURRENT
 
 _LOGGER = logging.getLogger(__name__)
 
+SCHEMA_VERSION = vol.Schema({
+    vol.Optional(ATTR_VERSION): vol.Coerce(str),
+})
+
 
 class APIHomeAssistant(object):
     """Handle rest api for homeassistant functions."""
@@ -30,7 +36,7 @@ class APIHomeAssistant(object):
     @api_process
     async def update(self, request):
         """Update host OS."""
-        body = await request.json(loads=json_loads)
+        body = await api_validate(SCHEMA_VERSION, request)
         version = body.get(ATTR_VERSION, self.config.current_homeassistant)
 
         if self.dock_hass.in_progress:
diff --git a/hassio/api/host.py b/hassio/api/host.py
index 5fc0c0fa4..23f0fb453 100644
--- a/hassio/api/host.py
+++ b/hassio/api/host.py
@@ -1,11 +1,19 @@
 """Init file for HassIO host rest api."""
 import logging
 
-from .util import api_process_hostcontroll, json_loads
+import voluptuous as vol
+
+from .util import api_process_hostcontroll, api_process, api_validate
 from ..const import ATTR_VERSION
 
 _LOGGER = logging.getLogger(__name__)
 
+UNKNOWN = 'unknown'
+
+SCHEMA_VERSION = vol.Schema({
+    vol.Optional(ATTR_VERSION): vol.Coerce(str),
+})
+
 
 class APIHost(object):
     """Handle rest api for host functions."""
@@ -16,10 +24,20 @@ class APIHost(object):
         self.loop = loop
         self.host_controll = host_controll
 
-    @api_process_hostcontroll
-    def info(self, request):
+    @api_process
+    async def info(self, request):
         """Return host information."""
-        return self.host_controll.info()
+        if not self.host_controll.active:
+            info = {
+                'os': UNKNOWN,
+                'version': UNKNOWN,
+                'current': UNKNOWN,
+                'level': 0,
+                'hostname': UNKNOWN,
+            }
+            return info
+
+        return await self.host_controll.info()
 
     @api_process_hostcontroll
     def reboot(self, request):
@@ -31,20 +49,10 @@ class APIHost(object):
         """Poweroff host."""
         return self.host_controll.shutdown()
 
-    @api_process_hostcontroll
-    def network_info(self, request):
-        """Edit network settings."""
-        pass
-
-    @api_process_hostcontroll
-    def network_update(self, request):
-        """Edit network settings."""
-        pass
-
     @api_process_hostcontroll
     async def update(self, request):
         """Update host OS."""
-        body = await request.json(loads=json_loads)
+        body = await api_validate(SCHEMA_VERSION, request)
         version = body.get(ATTR_VERSION)
 
         if version == self.host_controll.version:
diff --git a/hassio/api/supervisor.py b/hassio/api/supervisor.py
index 62925b1fe..73ef6ae5b 100644
--- a/hassio/api/supervisor.py
+++ b/hassio/api/supervisor.py
@@ -1,11 +1,22 @@
 """Init file for HassIO supervisor rest api."""
 import logging
 
-from .util import api_process, api_process_hostcontroll, json_loads
+import voluptuous as vol
+
+from .util import api_process, api_process_hostcontroll, api_validate
 from ..const import ATTR_VERSION, ATTR_CURRENT, ATTR_BETA, HASSIO_VERSION
 
 _LOGGER = logging.getLogger(__name__)
 
+SCHEMA_OPTIONS = vol.Schema({
+    # pylint: disable=no-value-for-parameter
+    vol.Optional(ATTR_BETA): vol.Boolean(),
+})
+
+SCHEMA_VERSION = vol.Schema({
+    vol.Optional(ATTR_VERSION): vol.Coerce(str),
+})
+
 
 class APISupervisor(object):
     """Handle rest api for supervisor functions."""
@@ -16,6 +27,11 @@ class APISupervisor(object):
         self.loop = loop
         self.host_controll = host_controll
 
+    @api_process
+    async def ping(self, request):
+        """Return ok for signal that the api is ready."""
+        return True
+
     @api_process
     async def info(self, request):
         """Return host information."""
@@ -30,7 +46,7 @@ class APISupervisor(object):
     @api_process
     async def options(self, request):
         """Set supervisor options."""
-        body = await request.json(loads=json_loads)
+        body = await api_validate(SCHEMA_OPTIONS, request)
 
         if ATTR_BETA in body:
             self.config.upstream_beta = body[ATTR_BETA]
@@ -40,7 +56,7 @@ class APISupervisor(object):
     @api_process_hostcontroll
     async def update(self, request):
         """Update host OS."""
-        body = await request.json(loads=json_loads)
+        body = await api_validate(SCHEMA_VERSION, request)
         version = body.get(ATTR_VERSION, self.config.current_hassio)
 
         if version == HASSIO_VERSION:
diff --git a/hassio/api/util.py b/hassio/api/util.py
index c1225400b..fd75d5ec2 100644
--- a/hassio/api/util.py
+++ b/hassio/api/util.py
@@ -4,6 +4,8 @@ import logging
 
 from aiohttp import web
 from aiohttp.web_exceptions import HTTPServiceUnavailable
+import voluptuous as vol
+from voluptuous.humanize import humanize_error
 
 from ..const import (
     JSON_RESULT, JSON_DATA, JSON_MESSAGE, RESULT_OK, RESULT_ERROR)
@@ -52,7 +54,7 @@ def api_process_hostcontroll(method):
         if isinstance(answer, dict):
             return api_return_ok(data=answer)
         elif answer is None:
-            return api_not_supported()
+            return api_return_error("Function is not supported")
         elif answer:
             return api_return_ok()
         return api_return_error()
@@ -72,10 +74,16 @@ def api_return_ok(data=None):
     """Return a API ok answer."""
     return web.json_response({
         JSON_RESULT: RESULT_OK,
-        JSON_DATA: data,
+        JSON_DATA: data or {},
     })
 
 
-def api_not_supported():
-    """Return a api error with not supported."""
-    return api_return_error("Function is not supported")
+async def api_validate(schema, request):
+    """Validate request data with schema."""
+    data = await request.json(loads=json_loads)
+    try:
+        schema(data)
+    except vol.Invalid as ex:
+        raise RuntimeError(humanize_error(data, ex)) from None
+
+    return data
diff --git a/hassio/const.py b/hassio/const.py
index a531b3c68..e641ea88a 100644
--- a/hassio/const.py
+++ b/hassio/const.py
@@ -1,5 +1,5 @@
 """Const file for HassIO."""
-HASSIO_VERSION = '0.4'
+HASSIO_VERSION = '0.5'
 
 URL_HASSIO_VERSION = \
     'https://raw.githubusercontent.com/pvizeli/hassio/master/version.json'
diff --git a/setup.py b/setup.py
index 7927bbf33..31a39092c 100644
--- a/setup.py
+++ b/setup.py
@@ -36,5 +36,6 @@ setup(
         'aiohttp',
         'docker',
         'colorlog',
+        'voluptuous',
     ]
 )