diff --git a/specification/eventgrid/data-plane/Microsoft.Devices/stable/2018-01-01/IotHub.json b/specification/eventgrid/data-plane/Microsoft.Devices/stable/2018-01-01/IotHub.json
new file mode 100644
index 000000000000..2c2b4efc8351
--- /dev/null
+++ b/specification/eventgrid/data-plane/Microsoft.Devices/stable/2018-01-01/IotHub.json
@@ -0,0 +1,153 @@
+{
+  "swagger": "2.0",
+  "info": {
+    "version": "2018-01-01",
+    "title": "Schema of Azure IoT Hub events published to Azure Event Grid",
+    "description":
+      "Describes the schema of the Azure IoT Hub events published to Azure Event Grid. This corresponds to the Data property of an EventGridEvent."
+  },
+  "paths": {},
+  "definitions": {
+    "IotHubDeviceCreatedEventData": {
+      "description": "Event data for Microsoft.Devices.DeviceCreated event.",
+      "allOf": [
+        {
+          "$ref": "#/definitions/DeviceLifeCycleEventProperties"
+        }
+      ],
+      "properties": {}
+    },
+    "IotHubDeviceDeletedEventData": {
+      "description": "Event data for Microsoft.Devices.DeviceDeleted event.",
+      "allOf": [
+        {
+          "$ref": "#/definitions/DeviceLifeCycleEventProperties"
+        }
+      ],
+      "properties": {}
+    },
+    "DeviceLifeCycleEventProperties": {
+      "type": "object",
+      "description": "Schema of the Data property of an EventGridEvent for a device life cycle event (DeviceCreated, DeviceDeleted).",
+      "properties": {
+        "deviceId": {
+          "type": "string",
+          "description": "The unique identifier of the device. This case-sensitive string can be up to 128 characters long, and supports ASCII 7-bit alphanumeric characters plus the following special characters: - : . + % _ # * ? ! ( ) , = @ ; $ '."
+        },
+        "hubName": {
+          "type": "string",
+          "description": "Name of the IoT Hub where the device was created or deleted."
+        },
+        "opType": {
+          "type": "string",
+          "description": "The event type specified for this operation by the IoT Hub."
+        },
+        "operationTimestamp": {
+          "type": "string",
+          "description": "The ISO8601 timestamp of the operation."
+        },
+        "twin": {
+          "description": "Information about the device twin, which is the cloud represenation of application device metadata.",
+          "$ref" : "#/definitions/DeviceTwinInfo"
+        }
+      }
+    },
+    "DeviceTwinInfo": {
+      "type": "object",
+      "description": "Information about the device twin, which is the cloud represenation of application device metadata.",
+      "properties": {
+        "authenticationType": {
+          "type": "string",
+          "description": "Authentication type used for this device: either SAS, SelfSigned, or CertificateAuthority."
+        },
+        "cloudToDeviceMessageCount": {
+          "type": "number",
+          "description": "Count of cloud to device messages sent to this device."
+        },
+        "connectionState": {
+          "type": "string",
+          "description": "Whether the device is connected or disconnected."
+        },
+        "deviceId": {
+          "type": "string",
+          "description": "The unique identifier of the device twin."
+        },
+        "etag": {
+          "type": "string",
+          "description": "A piece of information that describes the content of the device twin. Each etag is guaranteed to be unique per device twin."
+        },
+        "lastActivityTime": {
+          "type": "string",
+          "description": "The ISO8601 timestamp of the last activity."
+        },
+        "properties": {
+          "type": "object",
+          "description": "Properties JSON element.",
+          "properties": {
+            "desired": {
+              "description": "A portion of the properties that can be written only by the application back-end, and read by the device.",
+              "$ref" : "#/definitions/DeviceTwinProperties"
+            },
+            "reported": {
+              "description": "A portion of the properties that can be written only by the device, and read by the application back-end.",
+              "$ref" : "#/definitions/DeviceTwinProperties"
+            }
+          }
+        },
+        "status": {
+          "type": "string",
+          "description": "Whether the device twin is enabled or disabled."
+        },
+        "statusUpdateTime": {
+          "type": "string",
+          "description": "The ISO8601 timestamp of the last device twin status update."
+        },
+        "version": {
+          "type": "number",
+          "description": "An integer that is incremented by one each time the device twin is updated."
+        },
+        "x509Thumbprint": {
+          "type": "object",
+          "description": "The thumbprint is a unique value for the x509 certificate, commonly used to find a particular certificate in a certificate store. The thumbprint is dynamically generated using the SHA1 algorithm, and does not physically exist in the certificate.",
+          "properties": {
+            "primaryThumbprint": {
+              "type": "string",
+              "description": "Primary thumbprint for the x509 certificate."
+            },
+            "secondaryThumbprint": {
+              "type": "string",
+              "description": "Secondary thumbprint for the x509 certificate."
+            }
+          }
+        }
+      }
+    },
+    "DeviceTwinProperties": {
+      "type": "object",
+      "description": "A portion of the properties that can be written only by the application back-end, and read by the device.",
+      "properties": {
+        "metadata": {
+          "description": "Metadata information for the properties JSON document.",
+          "$ref" : "#/definitions/DeviceTwinMetadata",
+          "x-ms-client-name" : "$metadata"
+        },
+        "version": {
+          "type": "number",
+          "description": "Version of device twin properties.",
+          "x-ms-client-name" : "$version"
+        }
+      }
+    },
+    "DeviceTwinMetadata" : {
+      "type": "object",
+      "description": "Metadata information for the properties JSON document.",
+      "properties": {
+        "lastUpdated": {
+          "type": "string",
+          "description": "The ISO8601 timestamp of the last time the properties were updated.",
+          "x-ms-client-name" : "$lastUpdated"
+        }
+      }
+    }
+  }
+}
\ No newline at end of file
diff --git a/specification/eventgrid/data-plane/readme.md b/specification/eventgrid/data-plane/readme.md
index be66240d087e..9d089e77fb0c 100644
--- a/specification/eventgrid/data-plane/readme.md
+++ b/specification/eventgrid/data-plane/readme.md
@@ -48,6 +48,7 @@ input-file:
 - Microsoft.EventHub/stable/2018-01-01/EventHub.json
 - Microsoft.Resources/stable/2018-01-01/Resources.json
 - Microsoft.EventGrid/stable/2018-01-01/EventGrid.json
+- Microsoft.Devices/stable/2018-01-01/IotHub.json
 ```
 
 ---