diff --git a/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2018-10-01/containerInstance.json b/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2018-10-01/containerInstance.json
index c1fcd7ede62c..086e1f848f2f 100644
--- a/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2018-10-01/containerInstance.json
+++ b/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2018-10-01/containerInstance.json
@@ -57,6 +57,12 @@
             "schema": {
               "$ref": "#/definitions/ContainerGroupListResult"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
           }
         },
         "x-ms-pageable": {
@@ -91,6 +97,12 @@
             "schema": {
               "$ref": "#/definitions/ContainerGroupListResult"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
           }
         },
         "x-ms-pageable": {
@@ -131,6 +143,12 @@
             "schema": {
               "$ref": "#/definitions/ContainerGroup"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
           }
         }
       },
@@ -178,8 +196,14 @@
             "schema": {
               "$ref": "#/definitions/ContainerGroup"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
           }
-        }, 
+        },
         "x-ms-long-running-operation": true
       },
       "patch": {
@@ -220,6 +244,12 @@
             "schema": {
               "$ref": "#/definitions/ContainerGroup"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
           }
         }
       },
@@ -255,6 +285,12 @@
           },
           "204": {
             "description": "No Content - the specified container group was not found."
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
           }
         }
       }
@@ -286,6 +322,12 @@
         "responses": {
           "204": {
             "description": "NoContent"
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
           }
         },
         "x-ms-long-running-operation": true
@@ -318,6 +360,12 @@
         "responses": {
           "204": {
             "description": "NoContent"
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
           }
         }
       }
@@ -349,6 +397,12 @@
         "responses": {
           "204": {
             "description": "NoContent"
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
           }
         },
         "x-ms-long-running-operation": true
@@ -377,6 +431,12 @@
             "schema": {
               "$ref": "#/definitions/OperationListResult"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
           }
         }
       }
@@ -407,6 +467,12 @@
             "schema": {
               "$ref": "#/definitions/UsageListResult"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
           }
         }
       }
@@ -454,6 +520,12 @@
             "schema": {
               "$ref": "#/definitions/Logs"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
           }
         }
       }
@@ -489,12 +561,12 @@
             "type": "string"
           },
           {
-            "name":"containerExecRequest",
-            "in":"body",
-            "description":"The request for the exec command.",
-            "required":true,
-            "schema":{
-                "$ref":"#/definitions/ContainerExecRequest"
+            "name": "containerExecRequest",
+            "in": "body",
+            "description": "The request for the exec command.",
+            "required": true,
+            "schema": {
+              "$ref": "#/definitions/ContainerExecRequest"
             }
           }
         ],
@@ -504,6 +576,12 @@
             "schema": {
               "$ref": "#/definitions/ContainerExecResponse"
             }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
           }
         }
       }
@@ -541,6 +619,86 @@
           },
           "204": {
             "description": "No Content - the specified service association link was not found."
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        }
+      }
+    },
+    "/subscriptions/{subscriptionId}/providers/Microsoft.ContainerInstance/locations/{location}/cachedImages": {
+      "get": {
+        "operationId": "ListCachedImages",
+        "x-ms-examples": {
+          "CachedImages": {
+            "$ref": "./examples/CachedImagesList.json"
+          }
+        },
+        "summary": "Get the list of cached images.",
+        "description": "Get the list of cached images on specific OS type for a subscription in a region.",
+        "parameters": [
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "#/parameters/LocationParameter"
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK",
+            "schema": {
+              "$ref": "#/definitions/CachedImagesListResult"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
+          }
+        }
+      }
+    },
+    "/subscriptions/{subscriptionId}/providers/Microsoft.ContainerInstance/locations/{location}/capabilities": {
+      "get": {
+        "operationId": "ListCapabilities",
+        "x-ms-examples": {
+          "GetCapabilities": {
+            "$ref": "./examples/CapabilitiesList.json"
+          }
+        },
+        "summary": "Get the list of capabilities of the location.",
+        "description": "Get the list of CPU/memory/GPU capabilities of a region.",
+        "parameters": [
+          {
+            "$ref": "#/parameters/SubscriptionIdParameter"
+          },
+          {
+            "$ref": "#/parameters/LocationParameter"
+          },
+          {
+            "$ref": "#/parameters/ApiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK",
+            "schema": {
+              "$ref": "#/definitions/CapabilitiesListResult"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/CloudError"
+            }
           }
         }
       }
@@ -840,7 +998,7 @@
     "GitRepoVolume": {
       "description": "Represents a volume that is populated with the contents of a git repository",
       "required": [
-       "repository"
+        "repository"
       ],
       "properties": {
         "directory": {
@@ -1348,7 +1506,7 @@
         "name"
       ]
     },
-    "OperationListResult":{
+    "OperationListResult": {
       "description": "The operation list response that contains all operations for Azure Container Instance service.",
       "type": "object",
       "properties": {
@@ -1395,6 +1553,10 @@
             }
           }
         },
+        "properties": {
+          "type": "object",
+          "description": "The additional properties."
+        },
         "origin": {
           "type": "string",
           "description": "The intended executor of the operation.",
@@ -1409,8 +1571,8 @@
         }
       },
       "required": [
-          "name",
-          "display"
+        "name",
+        "display"
       ]
     },
     "UsageListResult": {
@@ -1450,7 +1612,7 @@
           "type": "object",
           "description": "The name object of the resource",
           "properties": {
-            "value":{
+            "value": {
               "readOnly": true,
               "type": "string",
               "description": "The name of the resource"
@@ -1503,7 +1665,7 @@
           "type": "object",
           "description": "The size of the terminal.",
           "properties": {
-            "rows":{
+            "rows": {
               "type": "integer",
               "description": "The row size of the terminal"
             },
@@ -1585,6 +1747,149 @@
         }
       },
       "x-ms-azure-resource": true
+    },
+    "CachedImagesListResult": {
+      "description": "The response containing cached images.",
+      "type": "object",
+      "properties": {
+        "value": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/cachedImages"
+          },
+          "description": "The list of cached images."
+        },
+        "nextLink": {
+          "type": "string",
+          "description": "The URI to fetch the next page of cached images."
+        }
+      }
+    },
+    "cachedImages": {
+      "description": "The cached image and OS type.",
+      "type": "object",
+      "required": [
+        "osType",
+        "image"
+      ],
+      "properties": {
+        "id": {
+          "type": "string",
+          "description": "The resource Id of the cached image."
+        },
+        "osType": {
+          "type": "string",
+          "description": "The OS type of the cached image."
+        },
+        "image": {
+          "type": "string",
+          "description": "The cached image name."
+        }
+      }
+    },
+    "CapabilitiesListResult": {
+      "description": "The response containing list of capabilities.",
+      "type": "object",
+      "properties": {
+        "value": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/Capabilities"
+          },
+          "description": "The list of capabilities."
+        },
+        "nextLink": {
+          "type": "string",
+          "description": "The URI to fetch the next page of capabilities."
+        }
+      }
+    },
+    "Capabilities": {
+      "description": "The regional capabilities.",
+      "type": "object",
+      "properties": {
+        "resourceType": {
+          "type": "string",
+          "readOnly": true,
+          "description": "The resource type that this capability describes."
+        },
+        "osType": {
+          "type": "string",
+          "readOnly": true,
+          "description": "The OS type that this capability describes."
+        },
+        "location": {
+          "type": "string",
+          "readOnly": true,
+          "description": "The resource location."
+        },
+        "ipAddressType": {
+          "type": "string",
+          "readOnly": true,
+          "description": "The ip address type that this capability describes."
+        },
+        "gpu": {
+          "type": "string",
+          "readOnly": true,
+          "description": "The GPU sku that this capability describes."
+        },
+        "capabilities": {
+          "type": "object",
+          "readOnly": true,
+          "description": "The supported capabilities.",
+          "properties": {
+            "maxMemoryInGB": {
+              "type": "number",
+              "readOnly": true,
+              "description": "The maximum allowed memory request in GB."
+            },
+            "maxCpu": {
+              "type": "number",
+              "readOnly": true,
+              "description": "The maximum allowed CPU request in cores."
+            },
+            "maxGpuCount": {
+              "type": "number",
+              "readOnly": true,
+              "description": "The maximum allowed GPU count."
+            }
+          }
+        }
+      }
+    },
+    "CloudError": {
+      "x-ms-external": true,
+      "properties": {
+        "error": {
+          "$ref": "#/definitions/CloudErrorBody"
+        }
+      },
+      "description": "An error response from the Batch service."
+    },
+    "CloudErrorBody": {
+      "x-ms-external": true,
+      "properties": {
+        "code": {
+          "type": "string",
+          "description": "An identifier for the error. Codes are invariant and are intended to be consumed programmatically."
+        },
+        "message": {
+          "type": "string",
+          "description": "A message describing the error, intended to be suitable for display in a user interface."
+        },
+        "target": {
+          "type": "string",
+          "description": "The target of the particular error. For example, the name of the property in error."
+        },
+        "details": {
+          "type": "array",
+          "items": {
+            "$ref": "#/definitions/CloudErrorBody"
+          },
+          "description": "A list of additional details about the error."
+        }
+      },
+      "description": "An error response from the Batch service."
     }
   },
   "parameters": {
@@ -1653,4 +1958,4 @@
       "x-ms-parameter-location": "method"
     }
   }
-}
+}
\ No newline at end of file
diff --git a/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2018-10-01/examples/CachedImagesList.json b/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2018-10-01/examples/CachedImagesList.json
new file mode 100644
index 000000000000..68ad175c3ddb
--- /dev/null
+++ b/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2018-10-01/examples/CachedImagesList.json
@@ -0,0 +1,28 @@
+{
+    "parameters": {
+      "subscriptionId": "subid",
+      "location": "westcentralus",
+      "api-version": "2018-10-01"
+    },
+    "responses": {
+      "200": {
+        "body": {
+          "value": [
+            {
+              "osType": "Linux",
+              "image": "ubuntu:16.04"
+            },
+            {
+              "osType": "Linux",
+              "image": "alpine:3.6"
+            },
+            {
+              "osType": "Windows",
+              "image": "microsoft/nanoserver:10.0.14393.2485"
+            }
+          ]
+        }
+      }
+    }
+  }
+  
\ No newline at end of file
diff --git a/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2018-10-01/examples/CapabilitiesList.json b/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2018-10-01/examples/CapabilitiesList.json
new file mode 100644
index 000000000000..065072c43f9d
--- /dev/null
+++ b/specification/containerinstance/resource-manager/Microsoft.ContainerInstance/stable/2018-10-01/examples/CapabilitiesList.json
@@ -0,0 +1,39 @@
+{
+    "parameters": {
+        "subscriptionId": "subid",
+        "location": "westus",
+        "api-version": "2018-10-01"
+    },
+    "responses": {
+        "200": {
+            "body": {
+                "value": [
+                    {
+                        "resourceType": "containerGroups",
+                        "osType": "Linux",
+                        "location": "West US",
+                        "ipAddressType": "Public",
+                        "gpu": "K80",
+                        "capabilities": {
+                            "maxMemoryInGB": 14,
+                            "maxCpu": 4,
+                            "maxGpuCount": 4
+                        }
+                    },
+                    {
+                        "resourceType": "containerGroups",
+                        "osType": "Windows",
+                        "location": "West US",
+                        "ipAddressType": "Public",
+                        "gpu": "None",
+                        "capabilities": {
+                            "maxMemoryInGB": 14,
+                            "maxCpu": 4,
+                            "maxGpuCount": 0
+                        }
+                    }
+                ]
+            }
+        }
+    }
+}
\ No newline at end of file