diff --git a/specification/cosmos-db/resource-manager/Microsoft.DocumentDB/preview/2021-11-15-preview/dataTransferService.json b/specification/cosmos-db/resource-manager/Microsoft.DocumentDB/preview/2021-11-15-preview/dataTransferService.json
index 099fa8bcaee5..f0ed3be2b82c 100644
--- a/specification/cosmos-db/resource-manager/Microsoft.DocumentDB/preview/2021-11-15-preview/dataTransferService.json
+++ b/specification/cosmos-db/resource-manager/Microsoft.DocumentDB/preview/2021-11-15-preview/dataTransferService.json
@@ -176,7 +176,8 @@
           "type": "string",
           "enum": [
             "CosmosDBCassandra",
-            "AzureStorage"
+            "CosmosDBSql",
+            "AzureBlobStorage"
           ],
           "x-ms-enum": {
             "name": "DataTransferComponent",
@@ -212,6 +213,28 @@
       ],
       "x-ms-discriminator-value": "CosmosDBCassandra"
     },
+    "CosmosSqlDataTransferDataSourceSink": {
+      "type": "object",
+      "description": "A CosmosDB Cassandra API data source/sink",
+      "properties": {
+        "databaseName": {
+          "type": "string"
+        },
+        "containerName": {
+          "type": "string"
+        }
+      },
+      "allOf": [
+        {
+          "$ref": "#/definitions/DataTransferDataSourceSink"
+        }
+      ],
+      "required": [
+        "databaseName",
+        "containerName"
+      ],
+      "x-ms-discriminator-value": "CosmosDBSql"
+    },
     "AzureBlobDataTransferDataSourceSink": {
       "type": "object",
       "description": "An Azure Blob Storage data source/sink",