diff --git a/output/openapi/elasticsearch-openapi.json b/output/openapi/elasticsearch-openapi.json
index 7438e64a0a..ab0d99f3ff 100644
--- a/output/openapi/elasticsearch-openapi.json
+++ b/output/openapi/elasticsearch-openapi.json
@@ -11129,6 +11129,9 @@
           },
           {
             "$ref": "#/components/parameters/indices.get_alias#ignore_unavailable"
+          },
+          {
+            "$ref": "#/components/parameters/indices.get_alias#master_timeout"
           }
         ],
         "responses": {
@@ -11246,6 +11249,9 @@
           },
           {
             "$ref": "#/components/parameters/indices.exists_alias#ignore_unavailable"
+          },
+          {
+            "$ref": "#/components/parameters/indices.exists_alias#master_timeout"
           }
         ],
         "responses": {
@@ -12114,6 +12120,9 @@
           },
           {
             "$ref": "#/components/parameters/indices.get_alias#ignore_unavailable"
+          },
+          {
+            "$ref": "#/components/parameters/indices.get_alias#master_timeout"
           }
         ],
         "responses": {
@@ -12141,6 +12150,9 @@
           },
           {
             "$ref": "#/components/parameters/indices.exists_alias#ignore_unavailable"
+          },
+          {
+            "$ref": "#/components/parameters/indices.exists_alias#master_timeout"
           }
         ],
         "responses": {
@@ -12544,6 +12556,9 @@
           },
           {
             "$ref": "#/components/parameters/indices.get_alias#ignore_unavailable"
+          },
+          {
+            "$ref": "#/components/parameters/indices.get_alias#master_timeout"
           }
         ],
         "responses": {
@@ -12573,6 +12588,9 @@
           },
           {
             "$ref": "#/components/parameters/indices.get_alias#ignore_unavailable"
+          },
+          {
+            "$ref": "#/components/parameters/indices.get_alias#master_timeout"
           }
         ],
         "responses": {
@@ -96007,6 +96025,16 @@
         },
         "style": "form"
       },
+      "indices.exists_alias#master_timeout": {
+        "in": "query",
+        "name": "master_timeout",
+        "description": "Period to wait for a connection to the master node.\nIf no response is received before the timeout expires, the request fails and returns an error.",
+        "deprecated": false,
+        "schema": {
+          "$ref": "#/components/schemas/_types:Duration"
+        },
+        "style": "form"
+      },
       "indices.flush#index": {
         "in": "path",
         "name": "index",
@@ -96201,6 +96229,16 @@
         },
         "style": "form"
       },
+      "indices.get_alias#master_timeout": {
+        "in": "query",
+        "name": "master_timeout",
+        "description": "Period to wait for a connection to the master node.\nIf no response is received before the timeout expires, the request fails and returns an error.",
+        "deprecated": false,
+        "schema": {
+          "$ref": "#/components/schemas/_types:Duration"
+        },
+        "style": "form"
+      },
       "indices.get_data_stream#name": {
         "in": "path",
         "name": "name",
diff --git a/output/openapi/elasticsearch-serverless-openapi.json b/output/openapi/elasticsearch-serverless-openapi.json
index 012b0b62a7..8052f4f298 100644
--- a/output/openapi/elasticsearch-serverless-openapi.json
+++ b/output/openapi/elasticsearch-serverless-openapi.json
@@ -6533,6 +6533,9 @@
           },
           {
             "$ref": "#/components/parameters/indices.get_alias#ignore_unavailable"
+          },
+          {
+            "$ref": "#/components/parameters/indices.get_alias#master_timeout"
           }
         ],
         "responses": {
@@ -6650,6 +6653,9 @@
           },
           {
             "$ref": "#/components/parameters/indices.exists_alias#ignore_unavailable"
+          },
+          {
+            "$ref": "#/components/parameters/indices.exists_alias#master_timeout"
           }
         ],
         "responses": {
@@ -6956,6 +6962,9 @@
           },
           {
             "$ref": "#/components/parameters/indices.get_alias#ignore_unavailable"
+          },
+          {
+            "$ref": "#/components/parameters/indices.get_alias#master_timeout"
           }
         ],
         "responses": {
@@ -6983,6 +6992,9 @@
           },
           {
             "$ref": "#/components/parameters/indices.exists_alias#ignore_unavailable"
+          },
+          {
+            "$ref": "#/components/parameters/indices.exists_alias#master_timeout"
           }
         ],
         "responses": {
@@ -7076,6 +7088,9 @@
           },
           {
             "$ref": "#/components/parameters/indices.get_alias#ignore_unavailable"
+          },
+          {
+            "$ref": "#/components/parameters/indices.get_alias#master_timeout"
           }
         ],
         "responses": {
@@ -7105,6 +7120,9 @@
           },
           {
             "$ref": "#/components/parameters/indices.get_alias#ignore_unavailable"
+          },
+          {
+            "$ref": "#/components/parameters/indices.get_alias#master_timeout"
           }
         ],
         "responses": {
@@ -58797,6 +58815,16 @@
         },
         "style": "form"
       },
+      "indices.exists_alias#master_timeout": {
+        "in": "query",
+        "name": "master_timeout",
+        "description": "Period to wait for a connection to the master node.\nIf no response is received before the timeout expires, the request fails and returns an error.",
+        "deprecated": false,
+        "schema": {
+          "$ref": "#/components/schemas/_types:Duration"
+        },
+        "style": "form"
+      },
       "indices.get_alias#name": {
         "in": "path",
         "name": "name",
@@ -58849,6 +58877,16 @@
         },
         "style": "form"
       },
+      "indices.get_alias#master_timeout": {
+        "in": "query",
+        "name": "master_timeout",
+        "description": "Period to wait for a connection to the master node.\nIf no response is received before the timeout expires, the request fails and returns an error.",
+        "deprecated": false,
+        "schema": {
+          "$ref": "#/components/schemas/_types:Duration"
+        },
+        "style": "form"
+      },
       "indices.get_data_stream#name": {
         "in": "path",
         "name": "name",
diff --git a/output/schema/schema-serverless.json b/output/schema/schema-serverless.json
index 4fa02143e0..4e32424394 100644
--- a/output/schema/schema-serverless.json
+++ b/output/schema/schema-serverless.json
@@ -20840,9 +20840,22 @@
               "namespace": "_builtins"
             }
           }
+        },
+        {
+          "description": "Period to wait for a connection to the master node.\nIf no response is received before the timeout expires, the request fails and returns an error.",
+          "name": "master_timeout",
+          "required": false,
+          "serverDefault": "30s",
+          "type": {
+            "kind": "instance_of",
+            "type": {
+              "name": "Duration",
+              "namespace": "_types"
+            }
+          }
         }
       ],
-      "specLocation": "indices/exists_alias/IndicesExistsAliasRequest.ts#L23-L63"
+      "specLocation": "indices/exists_alias/IndicesExistsAliasRequest.ts#L24-L70"
     },
     {
       "body": {
@@ -21272,9 +21285,22 @@
               "namespace": "_builtins"
             }
           }
+        },
+        {
+          "description": "Period to wait for a connection to the master node.\nIf no response is received before the timeout expires, the request fails and returns an error.",
+          "name": "master_timeout",
+          "required": false,
+          "serverDefault": "30s",
+          "type": {
+            "kind": "instance_of",
+            "type": {
+              "name": "Duration",
+              "namespace": "_types"
+            }
+          }
         }
       ],
-      "specLocation": "indices/get_alias/IndicesGetAliasRequest.ts#L23-L66"
+      "specLocation": "indices/get_alias/IndicesGetAliasRequest.ts#L24-L73"
     },
     {
       "body": {
diff --git a/output/schema/schema.json b/output/schema/schema.json
index 4bc1f23da9..6da5b86c01 100644
--- a/output/schema/schema.json
+++ b/output/schema/schema.json
@@ -130350,9 +130350,22 @@
               "namespace": "_builtins"
             }
           }
+        },
+        {
+          "description": "Period to wait for a connection to the master node.\nIf no response is received before the timeout expires, the request fails and returns an error.",
+          "name": "master_timeout",
+          "required": false,
+          "serverDefault": "30s",
+          "type": {
+            "kind": "instance_of",
+            "type": {
+              "name": "Duration",
+              "namespace": "_types"
+            }
+          }
         }
       ],
-      "specLocation": "indices/exists_alias/IndicesExistsAliasRequest.ts#L23-L63"
+      "specLocation": "indices/exists_alias/IndicesExistsAliasRequest.ts#L24-L70"
     },
     {
       "kind": "response",
@@ -131871,9 +131884,22 @@
               "namespace": "_builtins"
             }
           }
+        },
+        {
+          "description": "Period to wait for a connection to the master node.\nIf no response is received before the timeout expires, the request fails and returns an error.",
+          "name": "master_timeout",
+          "required": false,
+          "serverDefault": "30s",
+          "type": {
+            "kind": "instance_of",
+            "type": {
+              "name": "Duration",
+              "namespace": "_types"
+            }
+          }
         }
       ],
-      "specLocation": "indices/get_alias/IndicesGetAliasRequest.ts#L23-L66"
+      "specLocation": "indices/get_alias/IndicesGetAliasRequest.ts#L24-L73"
     },
     {
       "kind": "response",
diff --git a/output/schema/validation-errors.json b/output/schema/validation-errors.json
index 041f98de05..dcaccc00a5 100644
--- a/output/schema/validation-errors.json
+++ b/output/schema/validation-errors.json
@@ -708,6 +708,12 @@
       ],
       "response": []
     },
+    "indices.exists_alias": {
+      "request": [
+        "Request: query parameter 'master_timeout' does not exist in the json spec"
+      ],
+      "response": []
+    },
     "indices.exists_index_template": {
       "request": [
         "Request: missing json spec query parameter 'flat_settings'",
@@ -723,6 +729,12 @@
       ],
       "response": []
     },
+    "indices.get_alias": {
+      "request": [
+        "Request: query parameter 'master_timeout' does not exist in the json spec"
+      ],
+      "response": []
+    },
     "indices.put_settings": {
       "request": [
         "Request: missing json spec query parameter 'reopen'"
diff --git a/output/typescript/types.ts b/output/typescript/types.ts
index 7dedb7fbf9..9e8f1e2ee3 100644
--- a/output/typescript/types.ts
+++ b/output/typescript/types.ts
@@ -11652,6 +11652,7 @@ export interface IndicesExistsAliasRequest extends RequestBase {
   allow_no_indices?: boolean
   expand_wildcards?: ExpandWildcards
   ignore_unavailable?: boolean
+  master_timeout?: Duration
 }
 
 export type IndicesExistsAliasResponse = boolean
@@ -11806,6 +11807,7 @@ export interface IndicesGetAliasRequest extends RequestBase {
   allow_no_indices?: boolean
   expand_wildcards?: ExpandWildcards
   ignore_unavailable?: boolean
+  master_timeout?: Duration
 }
 
 export type IndicesGetAliasResponse = Record<IndexName, IndicesGetAliasIndexAliases>
diff --git a/specification/indices/exists_alias/IndicesExistsAliasRequest.ts b/specification/indices/exists_alias/IndicesExistsAliasRequest.ts
index de3f55b0fe..f9b25f61cb 100644
--- a/specification/indices/exists_alias/IndicesExistsAliasRequest.ts
+++ b/specification/indices/exists_alias/IndicesExistsAliasRequest.ts
@@ -19,6 +19,7 @@
 
 import { RequestBase } from '@_types/Base'
 import { ExpandWildcards, Indices, Names } from '@_types/common'
+import { Duration } from '@_types/Time'
 
 /**
  * Check aliases.
@@ -59,5 +60,11 @@ export interface Request extends RequestBase {
      * @server_default false
      */
     ignore_unavailable?: boolean
+    /**
+     * Period to wait for a connection to the master node.
+     * If no response is received before the timeout expires, the request fails and returns an error.
+     * @server_default 30s
+     */
+    master_timeout?: Duration
   }
 }
diff --git a/specification/indices/get_alias/IndicesGetAliasRequest.ts b/specification/indices/get_alias/IndicesGetAliasRequest.ts
index 43823f1c32..2d7b9d7b21 100644
--- a/specification/indices/get_alias/IndicesGetAliasRequest.ts
+++ b/specification/indices/get_alias/IndicesGetAliasRequest.ts
@@ -19,6 +19,7 @@
 
 import { RequestBase } from '@_types/Base'
 import { ExpandWildcards, Indices, Names } from '@_types/common'
+import { Duration } from '@_types/Time'
 
 /**
  * Get aliases.
@@ -62,5 +63,11 @@ export interface Request extends RequestBase {
      * @server_default false
      */
     ignore_unavailable?: boolean
+    /**
+     * Period to wait for a connection to the master node.
+     * If no response is received before the timeout expires, the request fails and returns an error.
+     * @server_default 30s
+     */
+    master_timeout?: Duration
   }
 }