diff --git a/eng/tox/mypy_hard_failure_packages.py b/eng/tox/mypy_hard_failure_packages.py
index 7c5f0a33de2b..c3966c3bf110 100644
--- a/eng/tox/mypy_hard_failure_packages.py
+++ b/eng/tox/mypy_hard_failure_packages.py
@@ -11,5 +11,6 @@
   "azure-servicebus",
   "azure-ai-textanalytics",
   "azure-ai-formrecognizer",
-  "azure-ai-metricsadvisor"
+  "azure-ai-metricsadvisor",
+  "azure-eventgrid",
 ]
diff --git a/sdk/eventgrid/azure-eventgrid/azure/__init__.py b/sdk/eventgrid/azure-eventgrid/azure/__init__.py
index 69e3be50dac4..0c36c2076ba0 100644
--- a/sdk/eventgrid/azure-eventgrid/azure/__init__.py
+++ b/sdk/eventgrid/azure-eventgrid/azure/__init__.py
@@ -1 +1 @@
-__path__ = __import__('pkgutil').extend_path(__path__, __name__)
+__path__ = __import__('pkgutil').extend_path(__path__, __name__) # type: ignore
diff --git a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_consumer.py b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_consumer.py
index acc80d774810..532ee81570ed 100644
--- a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_consumer.py
+++ b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_consumer.py
@@ -6,13 +6,13 @@
 # Changes may cause incorrect behavior and will be lost if the code is regenerated.
 # --------------------------------------------------------------------------
 
-from typing import TYPE_CHECKING
+from typing import cast, TYPE_CHECKING
 import logging
 from ._models import CloudEvent, EventGridEvent
 
 if TYPE_CHECKING:
     # pylint: disable=unused-import,ungrouped-imports
-    from typing import Any
+    from typing import Any, Union
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -58,7 +58,7 @@ def decode_eventgrid_event(self, eventgrid_event, **kwargs): # pylint: disable=n
             eventgrid_event = EventGridEvent._from_json(eventgrid_event, encode) # pylint: disable=protected-access
             deserialized_event = EventGridEvent.deserialize(eventgrid_event)
             EventGridEvent._deserialize_data(deserialized_event, deserialized_event.event_type) # pylint: disable=protected-access
-            return deserialized_event
+            return cast(EventGridEvent, deserialized_event)
         except Exception as err:
             _LOGGER.error('Error: cannot deserialize event. Event does not have a valid format. \
                 Event must be a string, dict, or bytes following the CloudEvent schema.')
diff --git a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_helpers.py b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_helpers.py
index 2bd67abd56e3..c9773a40336e 100644
--- a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_helpers.py
+++ b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_helpers.py
@@ -5,6 +5,7 @@
 import hashlib
 import hmac
 import base64
+from typing import TYPE_CHECKING, Any
 try:
     from urllib.parse import quote
 except ImportError:
@@ -16,8 +17,11 @@
 from ._signature_credential_policy import EventGridSharedAccessSignatureCredentialPolicy
 from . import _constants as constants
 
+if TYPE_CHECKING:
+    from datetime import datetime
+
 def generate_shared_access_signature(topic_hostname, shared_access_key, expiration_date_utc, **kwargs):
-    # type: (str, str, datetime.Datetime, Any) -> str
+    # type: (str, str, datetime, Any) -> str
     """ Helper method to generate shared access signature given hostname, key, and expiration date.
         :param str topic_hostname: The topic endpoint to send the events to.
             Similar to <YOUR-TOPIC-NAME>.<YOUR-REGION-NAME>-1.eventgrid.azure.net
@@ -82,7 +86,7 @@ def _get_authentication_policy(credential):
     return authentication_policy
 
 def _is_cloud_event(event):
-    # type: dict -> bool
+    # type: (Any) -> bool
     required = ('id', 'source', 'specversion', 'type')
     try:
         return all([_ in event for _ in required]) and event['specversion'] == "1.0"
diff --git a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_models.py b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_models.py
index a304f488fa51..304b4aa19677 100644
--- a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_models.py
+++ b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_models.py
@@ -3,6 +3,7 @@
 # Licensed under the MIT License. See License.txt in the project root for license information.
 # --------------------------------------------------------------------------------------------
 # pylint:disable=protected-access
+from typing import Union, Any, Dict
 import datetime as dt
 import uuid
 import json
@@ -87,6 +88,7 @@ def __init__(self, source, type, **kwargs): # pylint: disable=redefined-builtin
 
     @classmethod
     def _from_generated(cls, cloud_event, **kwargs):
+        # type: (Union[str, Dict, bytes], Any) -> CloudEvent
         generated = InternalCloudEvent.deserialize(cloud_event)
         if generated.additional_properties:
             extensions = dict(generated.additional_properties)
diff --git a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_policies.py b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_policies.py
index b786f280cdb0..5de3c5025249 100644
--- a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_policies.py
+++ b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_policies.py
@@ -4,11 +4,14 @@
 # license information.
 # --------------------------------------------------------------------------
 import json
+from typing import TYPE_CHECKING
 import logging
 from azure.core.pipeline.policies import SansIOHTTPPolicy
 
 _LOGGER = logging.getLogger(__name__)
 
+if TYPE_CHECKING:
+    from azure.core.pipeline import PipelineRequest
 
 class CloudEventDistributedTracingPolicy(SansIOHTTPPolicy):
     """CloudEventDistributedTracingPolicy is a policy which adds distributed tracing informatiom
diff --git a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_publisher_client.py b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_publisher_client.py
index 806924e603d2..b7648b587e61 100644
--- a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_publisher_client.py
+++ b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_publisher_client.py
@@ -5,7 +5,7 @@
 # license information.
 # --------------------------------------------------------------------------
 
-from typing import TYPE_CHECKING
+from typing import TYPE_CHECKING, cast, Dict, List, Any, Union
 
 from azure.core.tracing.decorator import distributed_trace
 from azure.core.pipeline.policies import (
@@ -27,10 +27,12 @@
 from ._generated._event_grid_publisher_client import EventGridPublisherClient as EventGridPublisherClientImpl
 from ._policies import CloudEventDistributedTracingPolicy
 from ._version import VERSION
+from ._generated.models import CloudEvent as InternalCloudEvent, EventGridEvent as InternalEventGridEvent
 
 if TYPE_CHECKING:
     # pylint: disable=unused-import,ungrouped-imports
-    from typing import Any, Union, Dict, List
+    from azure.core.credentials import AzureKeyCredential
+    from ._shared_access_signature_credential import EventGridSharedAccessSignatureCredential
     SendType = Union[
         CloudEvent,
         EventGridEvent,
@@ -42,6 +44,13 @@
         List[Dict]
     ]
 
+ListEventType = Union[
+    List[CloudEvent],
+    List[EventGridEvent],
+    List[CustomEvent],
+    List[Dict]
+]
+
 
 class EventGridPublisherClient(object):
     """EventGrid Python Publisher Client.
@@ -79,7 +88,7 @@ def _policies(credential, **kwargs):
             CustomHookPolicy(**kwargs),
             NetworkTraceLoggingPolicy(**kwargs),
             DistributedTracingPolicy(**kwargs),
-            CloudEventDistributedTracingPolicy(**kwargs),
+            CloudEventDistributedTracingPolicy(),
             HttpLoggingPolicy(**kwargs)
         ]
         return policies
@@ -98,20 +107,24 @@ def send(self, events, **kwargs):
         :raises: :class:`ValueError`, when events do not follow specified SendType.
          """
         if not isinstance(events, list):
-            events = [events]
+            events = cast(ListEventType, [events])
 
         if all(isinstance(e, CloudEvent) for e in events) or all(_is_cloud_event(e) for e in events):
             try:
-                events = [e._to_generated(**kwargs) for e in events] # pylint: disable=protected-access
+                events = [cast(CloudEvent, e)._to_generated(**kwargs) for e in events] # pylint: disable=protected-access
             except AttributeError:
                 pass # means it's a dictionary
             kwargs.setdefault("content_type", "application/cloudevents-batch+json; charset=utf-8")
-            self._client.publish_cloud_event_events(self._topic_hostname, events, **kwargs)
+            self._client.publish_cloud_event_events(
+                self._topic_hostname,
+                cast(List[InternalCloudEvent], events),
+                **kwargs
+                )
         elif all(isinstance(e, EventGridEvent) for e in events) or all(isinstance(e, dict) for e in events):
             kwargs.setdefault("content_type", "application/json; charset=utf-8")
-            self._client.publish_events(self._topic_hostname, events, **kwargs)
+            self._client.publish_events(self._topic_hostname, cast(List[InternalEventGridEvent], events), **kwargs)
         elif all(isinstance(e, CustomEvent) for e in events):
-            serialized_events = [dict(e) for e in events]
-            self._client.publish_custom_event_events(self._topic_hostname, serialized_events, **kwargs)
+            serialized_events = [dict(e) for e in events] # type: ignore
+            self._client.publish_custom_event_events(self._topic_hostname, cast(List, serialized_events), **kwargs)
         else:
             raise ValueError("Event schema is not correct.")
diff --git a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_signature_credential_policy.py b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_signature_credential_policy.py
index 3ae58fbf4a08..d210fe70b626 100644
--- a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_signature_credential_policy.py
+++ b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/_signature_credential_policy.py
@@ -4,10 +4,15 @@
 # license information.
 # -------------------------------------------------------------------------
 
+from typing import Any, TYPE_CHECKING
 import six
 
 from azure.core.pipeline.policies import SansIOHTTPPolicy
 
+if TYPE_CHECKING:
+    from ._shared_access_signature_credential import EventGridSharedAccessSignatureCredential
+
+
 class EventGridSharedAccessSignatureCredentialPolicy(SansIOHTTPPolicy):
     """Adds a token header for the provided credential.
     :param credential: The credential used to authenticate requests.
diff --git a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/aio/_publisher_client_async.py b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/aio/_publisher_client_async.py
index 218dea4edfb0..b2644f7aaa43 100644
--- a/sdk/eventgrid/azure-eventgrid/azure/eventgrid/aio/_publisher_client_async.py
+++ b/sdk/eventgrid/azure-eventgrid/azure/eventgrid/aio/_publisher_client_async.py
@@ -6,7 +6,7 @@
 # Changes may cause incorrect behavior and will be lost if the code is regenerated.
 # --------------------------------------------------------------------------
 
-from typing import Any, Union, List, Dict
+from typing import Any, Union, List, Dict, cast
 from azure.core.credentials import AzureKeyCredential
 from azure.core.tracing.decorator_async import distributed_trace_async
 from azure.core.pipeline.policies import (
@@ -26,19 +26,27 @@
 from .._models import CloudEvent, EventGridEvent, CustomEvent
 from .._helpers import _get_topic_hostname_only_fqdn, _get_authentication_policy, _is_cloud_event
 from .._generated.aio import EventGridPublisherClient as EventGridPublisherClientAsync
+from .._generated.models import CloudEvent as InternalCloudEvent, EventGridEvent as InternalEventGridEvent
 from .._shared_access_signature_credential import EventGridSharedAccessSignatureCredential
 from .._version import VERSION
 
 SendType = Union[
-        CloudEvent,
-        EventGridEvent,
-        CustomEvent,
-        Dict,
-        List[CloudEvent],
-        List[EventGridEvent],
-        List[CustomEvent],
-        List[Dict]
-    ]
+    CloudEvent,
+    EventGridEvent,
+    CustomEvent,
+    Dict,
+    List[CloudEvent],
+    List[EventGridEvent],
+    List[CustomEvent],
+    List[Dict]
+]
+
+ListEventType = Union[
+    List[CloudEvent],
+    List[EventGridEvent],
+    List[CustomEvent],
+    List[Dict]
+]
 
 class EventGridPublisherClient():
     """Asynchronous EventGrid Python Publisher Client.
@@ -101,20 +109,34 @@ async def send(
         :raises: :class:`ValueError`, when events do not follow specified SendType.
          """
         if not isinstance(events, list):
-            events = [events]
+            events = cast(ListEventType, [events])
 
         if all(isinstance(e, CloudEvent) for e in events) or all(_is_cloud_event(e) for e in events):
             try:
-                events = [e._to_generated(**kwargs) for e in events] # pylint: disable=protected-access
+                events = [
+                    cast(CloudEvent, e)._to_generated(**kwargs) for e in events # pylint: disable=protected-access
+                    ]
             except AttributeError:
                 pass # means it's a dictionary
             kwargs.setdefault("content_type", "application/cloudevents-batch+json; charset=utf-8")
-            await self._client.publish_cloud_event_events(self._topic_hostname, events, **kwargs)
+            await self._client.publish_cloud_event_events(
+                self._topic_hostname,
+                cast(List[InternalCloudEvent], events),
+                **kwargs
+                )
         elif all(isinstance(e, EventGridEvent) for e in events) or all(isinstance(e, dict) for e in events):
             kwargs.setdefault("content_type", "application/json; charset=utf-8")
-            await self._client.publish_events(self._topic_hostname, events, **kwargs)
+            await self._client.publish_events(
+                self._topic_hostname,
+                cast(List[InternalEventGridEvent], events),
+                **kwargs
+                )
         elif all(isinstance(e, CustomEvent) for e in events):
-            serialized_events = [dict(e) for e in events]
-            await self._client.publish_custom_event_events(self._topic_hostname, serialized_events, **kwargs)
+            serialized_events = [dict(e) for e in events] # type: ignore
+            await self._client.publish_custom_event_events(
+                self._topic_hostname,
+                cast(List, serialized_events),
+                **kwargs
+                )
         else:
             raise ValueError("Event schema is not correct.")
diff --git a/sdk/eventgrid/azure-eventgrid/mypy.ini b/sdk/eventgrid/azure-eventgrid/mypy.ini
new file mode 100644
index 000000000000..b8d3b2b62839
--- /dev/null
+++ b/sdk/eventgrid/azure-eventgrid/mypy.ini
@@ -0,0 +1,13 @@
+[mypy]
+python_version = 3.7
+warn_return_any = True
+warn_unused_configs = True
+ignore_missing_imports = True
+
+# Per-module options:
+
+[mypy-azure.eventgrid._generated.*]
+ignore_errors = True
+
+[mypy-azure.core.*]
+ignore_errors = True