diff --git a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/createOrUpdateWebTestMetricAlert.json b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/createOrUpdateWebTestMetricAlert.json
new file mode 100644
index 000000000000..1929399d105b
--- /dev/null
+++ b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/createOrUpdateWebTestMetricAlert.json
@@ -0,0 +1,66 @@
+{
+  "parameters": {
+    "subscriptionId": "12345678-1234-1234-1234-123456789101",
+    "resourceGroupName": "rg-example",
+    "ruleName": "webtest-name-example",
+    "api-version": "2018-03-01",
+    "parameters": {
+      "location": "global",
+      "tags": {
+        "hidden-link:/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/components/webtest-name-example": "Resource",
+        "hidden-link:/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/webtests/component-example": "Resource"
+      },
+      "properties": {
+        "description": "Automatically created alert rule for availability test \"component-example\" a",
+        "enabled": true,
+        "severity": 4,
+        "windowSize": "PT15M",
+        "evaluationFrequency": "PT1M",
+        "criteria": {
+          "failedLocationCount": 2,
+          "webTestId": "/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/webtests/component-example",
+          "componentId": "/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/components/webtest-name-example",
+          "odata.type": "Microsoft.Azure.Monitor.WebtestLocationAvailabilityCriteria"
+        },
+        "actions": [],
+        "scopes": [
+          "/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/webtests/component-example",
+          "/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/components/webtest-name-example"
+        ]
+      }
+    }
+  },
+  "responses": {
+    "200": {
+      "headers": {},
+      "body": {
+        "location": "global",
+        "type": "Microsoft.Insights/metricAlerts",
+        "name": "webtest-name-example",
+        "id": "/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/metricalerts/webtest-name-example",
+        "tags": {
+          "hidden-link:/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/components/component-example": "Resource",
+          "hidden-link:/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/webtests/webtest-name-example": "Resource"
+        },
+        "properties": {
+          "description": "Automatically created alert rule for availability test \"webtest-name-example\" a",
+          "severity": 4,
+          "enabled": true,
+          "scopes": [
+            "/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/webtests/webtest-name-example",
+            "/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/components/component-example"
+          ],
+          "evaluationFrequency": "PT1M",
+          "windowSize": "PT15M",
+          "criteria": {
+            "webTestId": "/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/webtests/webtest-name-example",
+            "componentId": "/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/components/component-example",
+            "failedLocationCount": 2,
+            "odata.type": "Microsoft.Azure.Monitor.WebtestLocationAvailabilityCriteria"
+          },
+          "actions": []
+        }
+      }
+    }
+  }
+}
diff --git a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/getWebTestMetricAlert.json b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/getWebTestMetricAlert.json
new file mode 100644
index 000000000000..498cfa7f1400
--- /dev/null
+++ b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/examples/getWebTestMetricAlert.json
@@ -0,0 +1,41 @@
+{
+  "parameters": {
+    "subscriptionId": "12345678-1234-1234-1234-123456789101",
+    "resourceGroupName": "rg-example",
+    "ruleName": "webtest-name-example",
+    "api-version": "2018-03-01"
+  },
+  "responses": {
+    "200": {
+      "headers": {},
+      "body": {
+        "location": "global",
+        "type": "Microsoft.Insights/metricAlerts",
+        "name": "webtest-name-example",
+        "id": "/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/metricalerts/webtest-name-example",
+        "tags": {
+          "hidden-link:/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/components/component-example": "Resource",
+          "hidden-link:/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/webtests/webtest-name-example": "Resource"
+        },
+        "properties": {
+          "description": "Automatically created alert rule for availability test \"webtest-name-example\"",
+          "severity": 4,
+          "enabled": true,
+          "scopes": [
+            "/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/webtests/webtest-name-example",
+            "/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/components/component-example"
+          ],
+          "evaluationFrequency": "PT1M",
+          "windowSize": "PT15M",
+          "criteria": {
+            "webTestId": "/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/webtests/webtest-name-example",
+            "componentId": "/subscriptions/12345678-1234-1234-1234-123456789101/resourcegroups/rg-example/providers/microsoft.insights/components/component-example",
+            "failedLocationCount": 2,
+            "odata.type": "Microsoft.Azure.Monitor.WebtestLocationAvailabilityCriteria"
+          },
+          "actions": []
+        }
+      }
+    }
+  }
+}
diff --git a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/metricAlert_API.json b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/metricAlert_API.json
index dfbf0b9cf660..f20f4baa2b79 100644
--- a/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/metricAlert_API.json
+++ b/specification/monitor/resource-manager/Microsoft.Insights/stable/2018-03-01/metricAlert_API.json
@@ -171,6 +171,9 @@
           },
           "Get a dynamic alert rule for multiple resources": {
             "$ref": "./examples/getDynamicMetricAlertMultipleResource.json"
+          },
+          "Get a web test alert rule": {
+            "$ref": "./examples/getWebTestMetricAlert.json"
           }
         }
       },
@@ -235,6 +238,9 @@
           },
           "Create or update a dynamic alert rule for Multiple Resources": {
             "$ref": "./examples/createOrUpdateDynamicMetricAlertMultipleResource.json"
+          },
+          "Create or update a web test alert rule": {
+            "$ref": "./examples/createOrUpdateWebTestMetricAlert.json"
           }
         }
       },
@@ -308,11 +314,11 @@
           }
         ],
         "responses": {
-          "204": {
-            "description": "No content: the request was successful, but the response is empty"
-          },
           "200": {
             "description": "Successful request to delete an metric alert rule"
+          },
+          "204": {
+            "description": "No content: the request was successful, but the response is empty"
           }
         },
         "x-ms-examples": {
@@ -647,9 +653,11 @@
       "discriminator": "odata.type",
       "properties": {
         "odata.type": {
+          "type": "string",
           "enum": [
             "Microsoft.Azure.Monitor.SingleResourceMultipleMetricCriteria",
-            "Microsoft.Azure.Monitor.MultipleResourceMultipleMetricCriteria"
+            "Microsoft.Azure.Monitor.MultipleResourceMultipleMetricCriteria",
+            "Microsoft.Azure.Monitor.WebtestLocationAvailabilityCriteria"
           ],
           "x-ms-enum": {
             "name": "odatatype",
@@ -682,6 +690,30 @@
       },
       "description": "Specifies the metric alert criteria for a single resource that has multiple metric criteria."
     },
+    "WebtestLocationAvailabilityCriteria": {
+      "x-ms-discriminator-value": "Microsoft.Azure.Monitor.WebtestLocationAvailabilityCriteria",
+      "type": "object",
+      "properties": {
+        "webTestId": {
+          "type": "string",
+          "description": "The Application Insights web test Id."
+        },
+        "componentId": {
+          "type": "string",
+          "description": "The Application Insights resource Id."
+        },
+        "failedLocationCount": {
+          "type": "number",
+          "description": "The number of failed locations."
+        }
+      },
+      "required": [
+        "webTestId",
+        "componentId",
+        "failedLocationCount"
+      ],
+      "description": "Specifies the metric alert rule criteria for a web test resource."
+    },
     "MetricCriteria": {
       "x-ms-discriminator-value": "StaticThresholdCriterion",
       "type": "object",
@@ -696,6 +728,7 @@
       ],
       "properties": {
         "operator": {
+          "type": "string",
           "enum": [
             "Equals",
             "NotEquals",
@@ -770,6 +803,7 @@
       "discriminator": "criterionType",
       "properties": {
         "criterionType": {
+          "type": "string",
           "enum": [
             "StaticThresholdCriterion",
             "DynamicThresholdCriterion"
@@ -795,10 +829,10 @@
         "timeAggregation": {
           "enum": [
             "Average",
+            "Count",
             "Minimum",
             "Maximum",
-            "Total",
-            "Count"
+            "Total"
           ],
           "x-ms-enum": {
             "name": "AggregationType",
@@ -837,6 +871,7 @@
       ],
       "properties": {
         "operator": {
+          "type": "string",
           "enum": [
             "GreaterThan",
             "LessThan",
@@ -849,6 +884,7 @@
           "description": "The operator used to compare the metric value against the threshold."
         },
         "alertSensitivity": {
+          "type": "string",
           "enum": [
             "Low",
             "Medium",
@@ -931,4 +967,4 @@
       "x-ms-parameter-location": "method"
     }
   }
-}
+}
\ No newline at end of file