diff --git a/specification/cost-management/resource-manager/Microsoft.CostManagement/preview/2018-08-01-preview/costmanagement.json b/specification/cost-management/resource-manager/Microsoft.CostManagement/preview/2018-08-01-preview/costmanagement.json
index e737d0fe77a4..2cada3c5bc95 100644
--- a/specification/cost-management/resource-manager/Microsoft.CostManagement/preview/2018-08-01-preview/costmanagement.json
+++ b/specification/cost-management/resource-manager/Microsoft.CostManagement/preview/2018-08-01-preview/costmanagement.json
@@ -1946,9 +1946,89 @@
           }
         }
       }
+    },
+    "/providers/Microsoft.CostManagement/operations": {
+      "get": {
+        "tags": [
+          "Operations"
+        ],
+        "operationId": "Operations_List",
+        "description": "Lists all of the available cost management REST API operations.",
+        "parameters": [
+          {
+            "$ref": "#/parameters/apiVersionParameter"
+          }
+        ],
+        "responses": {
+          "200": {
+            "description": "OK. The request has succeeded.",
+            "schema": {
+              "$ref": "#/definitions/OperationListResult"
+            }
+          },
+          "default": {
+            "description": "Error response describing why the operation failed.",
+            "schema": {
+              "$ref": "#/definitions/ErrorResponse"
+            }
+          }
+        },
+        "x-ms-pageable": {
+          "nextLinkName": "nextLink"
+        }
+      }
     }
   },
   "definitions": {
+    "Operation": {
+      "description": "A Cost Management REST API operation.",
+      "type": "object",
+      "properties": {
+        "name": {
+          "description": "Operation name: {provider}/{resource}/{operation}.",
+          "type": "string",
+          "readOnly": true
+        },
+        "display": {
+          "description": "The object that represents the operation.",
+          "properties": {
+            "provider": {
+              "description": "Service provider: Microsoft.CostManagement.",
+              "type": "string",
+              "readOnly": true
+            },
+            "resource": {
+              "description": "Resource on which the operation is performed: UsageDetail, etc.",
+              "type": "string",
+              "readOnly": true
+            },
+            "operation": {
+              "description": "Operation type: Read, write, delete, etc.",
+              "type": "string",
+              "readOnly": true
+            }
+          }
+        }
+      }
+    },
+    "OperationListResult": {
+      "description": "Result of listing CostManagement operations. It contains a list of operations and a URL link to get the next set of results.",
+      "properties": {
+        "value": {
+          "description": "List of CostManagement operations supported by the Microsoft.CostManagement resource provider.",
+          "type": "array",
+          "readOnly": true,
+          "items": {
+            "$ref": "#/definitions/Operation"
+          }
+        },
+        "nextLink": {
+          "description": "URL to get the next set of operation list results if there are any.",
+          "type": "string",
+          "readOnly": true
+        }
+      }
+    },
     "ErrorBase": {
       "description": "The details of the error.",
       "properties": {
@@ -2784,9 +2864,6 @@
         },
         "collection": {
           "$ref": "#/definitions/ConnectorCollectionInfo",
-          "x-ms-mutability": [
-            "read"
-          ],
           "description": "Collection information",
           "readOnly": true
         }
diff --git a/specification/cost-management/resource-manager/readme.md b/specification/cost-management/resource-manager/readme.md
index ade67a1f48e1..2574976be824 100644
--- a/specification/cost-management/resource-manager/readme.md
+++ b/specification/cost-management/resource-manager/readme.md
@@ -23,6 +23,7 @@ These are the global settings for the Cost Management API.
 ``` yaml
 openapi-type: arm
 tag: package-2018-05
+azure-validator: true
 ```
 
 ---
@@ -35,6 +36,14 @@ input-file:
 - Microsoft.CostManagement/stable/2018-05-31/costmanagement.json
 ```
 
+## Suppression
+``` yaml
+directive:
+  - suppress: R2059
+    from: costmanagement.json
+    where: $.paths
+    reason: We are extending Microsoft.Billing RP in some scenarios
+```
 
 ### Tag: package-2018-08-preview