diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/_internal.delete_desired_balance.json b/rest-api-spec/src/main/resources/rest-api-spec/api/_internal.delete_desired_balance.json
index be4e021bdbff2..258b0511259b9 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/_internal.delete_desired_balance.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/_internal.delete_desired_balance.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for connection to master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/_internal.delete_desired_nodes.json b/rest-api-spec/src/main/resources/rest-api-spec/api/_internal.delete_desired_nodes.json
index 71faa4f9feb4d..9f7b680749ae7 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/_internal.delete_desired_nodes.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/_internal.delete_desired_nodes.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/_internal.get_desired_balance.json b/rest-api-spec/src/main/resources/rest-api-spec/api/_internal.get_desired_balance.json
index d88f572ddfe96..ad7caef3d8052 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/_internal.get_desired_balance.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/_internal.get_desired_balance.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for connection to master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/_internal.prevalidate_node_removal.json b/rest-api-spec/src/main/resources/rest-api-spec/api/_internal.prevalidate_node_removal.json
index c8bcc424a4289..64959d622d23c 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/_internal.prevalidate_node_removal.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/_internal.prevalidate_node_removal.json
@@ -36,6 +36,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/autoscaling.delete_autoscaling_policy.json b/rest-api-spec/src/main/resources/rest-api-spec/api/autoscaling.delete_autoscaling_policy.json
index a47f8cb82c433..50cb170b82f2f 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/autoscaling.delete_autoscaling_policy.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/autoscaling.delete_autoscaling_policy.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for processing on master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/autoscaling.get_autoscaling_capacity.json b/rest-api-spec/src/main/resources/rest-api-spec/api/autoscaling.get_autoscaling_capacity.json
index d39b98f0898c9..054e85edb812b 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/autoscaling.get_autoscaling_capacity.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/autoscaling.get_autoscaling_capacity.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for processing on master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/autoscaling.get_autoscaling_policy.json b/rest-api-spec/src/main/resources/rest-api-spec/api/autoscaling.get_autoscaling_policy.json
index 5d43eb94dfd42..290fa68f6d2e4 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/autoscaling.get_autoscaling_policy.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/autoscaling.get_autoscaling_policy.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for processing on master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/autoscaling.put_autoscaling_policy.json b/rest-api-spec/src/main/resources/rest-api-spec/api/autoscaling.put_autoscaling_policy.json
index 44da3af2f970d..cbd9ee413a220 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/autoscaling.put_autoscaling_policy.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/autoscaling.put_autoscaling_policy.json
@@ -33,6 +33,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for processing on master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.allocation.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.allocation.json
index 6acb3fe9ca92f..69a293afb7cfe 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.allocation.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.allocation.json
@@ -58,6 +58,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "h": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.component_templates.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.component_templates.json
index e4415cddf9868..f7c17052494d4 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.component_templates.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.component_templates.json
@@ -46,6 +46,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "h": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.indices.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.indices.json
index c87b5806d60e4..d84d838de1c48 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.indices.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.indices.json
@@ -54,6 +54,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "h": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.master.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.master.json
index 9da84d92bea6c..271b6038bee74 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.master.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.master.json
@@ -34,6 +34,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "h": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.nodeattrs.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.nodeattrs.json
index cf0250fdd9e25..6a448d8a614af 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.nodeattrs.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.nodeattrs.json
@@ -34,6 +34,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "h": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.nodes.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.nodes.json
index 2d413e5c0bb07..1c9d5d9c3fcaf 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.nodes.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.nodes.json
@@ -46,6 +46,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "h": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.pending_tasks.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.pending_tasks.json
index 001bff6ada00c..b21c58474c9a5 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.pending_tasks.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.pending_tasks.json
@@ -34,6 +34,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "h": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.plugins.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.plugins.json
index bc94ad7547b78..da1a073695a95 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.plugins.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.plugins.json
@@ -34,6 +34,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "h": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.repositories.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.repositories.json
index 5ae7037f78184..e8b7feeccfc6d 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.repositories.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.repositories.json
@@ -35,6 +35,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "h": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.segments.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.segments.json
index 6a146b4bfd02c..a52f66f7bca4a 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.segments.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.segments.json
@@ -46,6 +46,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "bytes": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.shards.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.shards.json
index c95208c50e432..bd5a15c80ab8d 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.shards.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.shards.json
@@ -54,6 +54,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "h": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.snapshots.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.snapshots.json
index a5f45ac28325e..7b61fd79f2525 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.snapshots.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.snapshots.json
@@ -47,6 +47,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "h": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.templates.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.templates.json
index 178e9c8570730..196646ebdfd98 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.templates.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.templates.json
@@ -46,6 +46,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "h": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.thread_pool.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.thread_pool.json
index fa2c89fb07124..af8754fdb8827 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cat.thread_pool.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cat.thread_pool.json
@@ -59,6 +59,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "h": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.delete_auto_follow_pattern.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.delete_auto_follow_pattern.json
index 89ed1b21e1377..158d5c3e9db39 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.delete_auto_follow_pattern.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.delete_auto_follow_pattern.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.follow.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.follow.json
index a05824f79d888..45c871b5ecc54 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.follow.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.follow.json
@@ -38,6 +38,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.follow_info.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.follow_info.json
index 6381046683453..2c28124d6b497 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.follow_info.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.follow_info.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.get_auto_follow_pattern.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.get_auto_follow_pattern.json
index a69b64c72a1b4..f38e1a74e9e52 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.get_auto_follow_pattern.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.get_auto_follow_pattern.json
@@ -36,6 +36,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.pause_auto_follow_pattern.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.pause_auto_follow_pattern.json
index 2c53c447b55d6..bf8a160369fe1 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.pause_auto_follow_pattern.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.pause_auto_follow_pattern.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.pause_follow.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.pause_follow.json
index 3e555b6c63adc..8b6ebea3ec4c5 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.pause_follow.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.pause_follow.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.put_auto_follow_pattern.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.put_auto_follow_pattern.json
index 188b41f6e43f6..80e4a560ef229 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.put_auto_follow_pattern.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.put_auto_follow_pattern.json
@@ -33,6 +33,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.resume_auto_follow_pattern.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.resume_auto_follow_pattern.json
index ab34bd984a2b7..d1ddfc3e97750 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.resume_auto_follow_pattern.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.resume_auto_follow_pattern.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.resume_follow.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.resume_follow.json
index 271777a25781e..c000f1145c7e6 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.resume_follow.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.resume_follow.json
@@ -33,6 +33,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.stats.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.stats.json
index 1054fcb12e4e2..ae7d41cfc3428 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.stats.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.stats.json
@@ -28,6 +28,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.unfollow.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.unfollow.json
index b821526eb4f63..b5aebc501d563 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.unfollow.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ccr.unfollow.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.allocation_explain.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.allocation_explain.json
index 19b47a889b807..e3165fc97ed71 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.allocation_explain.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.allocation_explain.json
@@ -28,6 +28,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for connection to master node"
       },
       "include_yes_decisions": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.delete_component_template.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.delete_component_template.json
index 774cced86e924..7f1f75fcb951c 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.delete_component_template.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.delete_component_template.json
@@ -34,6 +34,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.delete_voting_config_exclusions.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.delete_voting_config_exclusions.json
index 722f7a0e8f604..fb18972f14883 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.delete_voting_config_exclusions.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.delete_voting_config_exclusions.json
@@ -29,8 +29,8 @@
       },
       "master_timeout": {
         "type": "time",
-        "description": "Timeout for submitting request to master",
-        "default": "30s"
+        "default": "30s",
+        "description": "Timeout for submitting request to master"
       }
     }
   }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.exists_component_template.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.exists_component_template.json
index 1c9b5a934d096..6d5d6433428d0 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.exists_component_template.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.exists_component_template.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "local": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.get_component_template.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.get_component_template.json
index 77915308cbfb5..9aef00d717579 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.get_component_template.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.get_component_template.json
@@ -36,6 +36,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "local": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.get_settings.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.get_settings.json
index 9ca0fbbb73623..34fbacf7fa04d 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.get_settings.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.get_settings.json
@@ -28,6 +28,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.health.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.health.json
index a0e01d5c89e59..eb03b44f97b84 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.health.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.health.json
@@ -62,6 +62,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.pending_tasks.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.pending_tasks.json
index 5990096d2da92..8286197be210c 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.pending_tasks.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.pending_tasks.json
@@ -28,6 +28,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.post_voting_config_exclusions.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.post_voting_config_exclusions.json
index c2aebd27b22e6..3e1d582342ebc 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.post_voting_config_exclusions.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.post_voting_config_exclusions.json
@@ -37,8 +37,8 @@
       },
       "master_timeout": {
         "type": "time",
-        "description": "Timeout for submitting request to master",
-        "default": "30s"
+        "default": "30s",
+        "description": "Timeout for submitting request to master"
       }
     }
   }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.put_component_template.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.put_component_template.json
index 532758702a3af..fc75269ee2649 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.put_component_template.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.put_component_template.json
@@ -44,6 +44,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.put_settings.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.put_settings.json
index 765aa9a031fb3..a6ccdaa0babb5 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.put_settings.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.put_settings.json
@@ -31,6 +31,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.reroute.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.reroute.json
index c0e75b6f5617e..b8c337eb03bd8 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.reroute.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.reroute.json
@@ -53,6 +53,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.state.json b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.state.json
index aeadd0256b3a8..61b561de48916 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.state.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/cluster.state.json
@@ -76,6 +76,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "flat_settings": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/dangling_indices.delete_dangling_index.json b/rest-api-spec/src/main/resources/rest-api-spec/api/dangling_indices.delete_dangling_index.json
index f6942f77f329e..493142872ee95 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/dangling_indices.delete_dangling_index.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/dangling_indices.delete_dangling_index.json
@@ -38,6 +38,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/dangling_indices.import_dangling_index.json b/rest-api-spec/src/main/resources/rest-api-spec/api/dangling_indices.import_dangling_index.json
index da36d1a9a044c..e92192cdaf662 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/dangling_indices.import_dangling_index.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/dangling_indices.import_dangling_index.json
@@ -38,6 +38,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/delete_script.json b/rest-api-spec/src/main/resources/rest-api-spec/api/delete_script.json
index 56fc1fc66bc4f..202f5443d9a2c 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/delete_script.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/delete_script.json
@@ -34,6 +34,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.delete_policy.json b/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.delete_policy.json
index 10896c8afa594..f95855918429f 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.delete_policy.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.delete_policy.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for processing on master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.execute_policy.json b/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.execute_policy.json
index 4e0828567fc7a..2cd8333d62737 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.execute_policy.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.execute_policy.json
@@ -35,6 +35,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for processing on master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.get_policy.json b/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.get_policy.json
index 4a0b917bcb17f..0326bc2a6ad1a 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.get_policy.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.get_policy.json
@@ -36,6 +36,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for processing on master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.put_policy.json b/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.put_policy.json
index 794f3795b16b0..6c87e033fc472 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.put_policy.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.put_policy.json
@@ -37,6 +37,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for processing on master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.stats.json b/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.stats.json
index 612ee4d0f4c28..6fdd4e3a8746e 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.stats.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/enrich.stats.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for processing on master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/features.get_features.json b/rest-api-spec/src/main/resources/rest-api-spec/api/features.get_features.json
index 99e0d6d40ea39..c3ca405f65305 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/features.get_features.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/features.get_features.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/features.reset_features.json b/rest-api-spec/src/main/resources/rest-api-spec/api/features.reset_features.json
index 07e1b8b8003b6..d6ceca6eae0ba 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/features.reset_features.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/features.reset_features.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/get_script.json b/rest-api-spec/src/main/resources/rest-api-spec/api/get_script.json
index 93ca6a9b19a73..c00ad798b22a5 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/get_script.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/get_script.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.delete_lifecycle.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.delete_lifecycle.json
index 9e0d4e4f01ec2..d10f041ca0ed5 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.delete_lifecycle.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.delete_lifecycle.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.explain_lifecycle.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.explain_lifecycle.json
index c67a83b3d3bb4..57865cb111d5a 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.explain_lifecycle.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.explain_lifecycle.json
@@ -38,6 +38,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.get_lifecycle.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.get_lifecycle.json
index 5610c20033a89..c318b0152f242 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.get_lifecycle.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.get_lifecycle.json
@@ -36,6 +36,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.put_lifecycle.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.put_lifecycle.json
index 35c13ee2aea4a..7d434d0f0e60a 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.put_lifecycle.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.put_lifecycle.json
@@ -33,6 +33,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.start.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.start.json
index ebd1a45a6a66d..07f4a0277cd70 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.start.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.start.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.stop.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.stop.json
index 00524c91646ce..0d3b2b84391bc 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.stop.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ilm.stop.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.add_block.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.add_block.json
index 633f0db858b17..a487cfb145a4e 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.add_block.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.add_block.json
@@ -38,6 +38,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "ignore_unavailable": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.clone.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.clone.json
index e11960e499731..82c75a16e7326 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.clone.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.clone.json
@@ -42,6 +42,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "wait_for_active_shards": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.close.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.close.json
index 4ae3d64eca5e1..6e127c5046581 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.close.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.close.json
@@ -34,6 +34,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "ignore_unavailable": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.create.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.create.json
index c72af4036f4b2..ba27be5d102af 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.create.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.create.json
@@ -41,6 +41,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.create_data_stream.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.create_data_stream.json
index 9ce1f00220814..e090364954fb1 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.create_data_stream.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.create_data_stream.json
@@ -34,6 +34,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete.json
index 5c6ef8f17ca86..239452020e0d4 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete.json
@@ -34,6 +34,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "ignore_unavailable": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_alias.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_alias.json
index b72dbca6eb3cb..c7368bf4f5f1f 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_alias.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_alias.json
@@ -54,6 +54,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_data_lifecycle.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_data_lifecycle.json
index 3c3e72ddc3c81..a4c8eb26db072 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_data_lifecycle.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_data_lifecycle.json
@@ -46,6 +46,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_data_stream.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_data_stream.json
index 2a9bfb3bdefca..edc45e8613ab8 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_data_stream.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_data_stream.json
@@ -42,6 +42,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_data_stream_options.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_data_stream_options.json
index bf48439fdd009..3ce16f7325214 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_data_stream_options.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_data_stream_options.json
@@ -46,6 +46,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_index_template.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_index_template.json
index 5e3f9e99bae14..3ba22ae00d164 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_index_template.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_index_template.json
@@ -34,6 +34,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_template.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_template.json
index 4694731bb9fc7..053ebd5d73415 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_template.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.delete_template.json
@@ -34,6 +34,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.exists_index_template.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.exists_index_template.json
index 8858f35f63abe..787c37c112298 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.exists_index_template.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.exists_index_template.json
@@ -34,6 +34,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "local": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.exists_template.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.exists_template.json
index 13ecd60cef861..1398d1e49f3bb 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.exists_template.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.exists_template.json
@@ -34,6 +34,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "local": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.explain_data_lifecycle.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.explain_data_lifecycle.json
index 56df66e278cd1..e8a9e22a40183 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.explain_data_lifecycle.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.explain_data_lifecycle.json
@@ -34,6 +34,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get.json
index 886b4eff35cf8..97d5f36c19aed 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get.json
@@ -73,6 +73,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_lifecycle.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_lifecycle.json
index 806aa6ae7447f..1b02b26483ca8 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_lifecycle.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_lifecycle.json
@@ -46,6 +46,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_stream.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_stream.json
index 764c6c1f7ebba..1dbd1cec443ec 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_stream.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_stream.json
@@ -52,6 +52,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "verbose": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_stream_options.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_stream_options.json
index 7109e50756541..f6c21f5eda5af 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_stream_options.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_stream_options.json
@@ -42,6 +42,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_stream_settings.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_stream_settings.json
index 5154b47b80873..568d5447d294c 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_stream_settings.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_data_stream_settings.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Period to wait for a connection to the master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_index_template.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_index_template.json
index 0f7b128a9045c..a0da911cf0511 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_index_template.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_index_template.json
@@ -40,6 +40,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "local": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_mapping.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_mapping.json
index a4d8cd8b9019e..6cbcdb1295d61 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_mapping.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_mapping.json
@@ -56,6 +56,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "local": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_settings.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_settings.json
index f49efe140fe50..dd36f1446f711 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_settings.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_settings.json
@@ -64,6 +64,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "ignore_unavailable": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_template.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_template.json
index cce8a8adf7692..9bb943d4fdebd 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_template.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.get_template.json
@@ -40,6 +40,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "local": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.migrate_to_data_stream.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.migrate_to_data_stream.json
index 6512f9ea97095..8ba3fbf3af41d 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.migrate_to_data_stream.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.migrate_to_data_stream.json
@@ -34,6 +34,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.open.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.open.json
index 148c9dbf5df62..c84ad0a944c24 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.open.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.open.json
@@ -34,6 +34,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "ignore_unavailable": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.promote_data_stream.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.promote_data_stream.json
index b310955da374e..1ec95fde994f1 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.promote_data_stream.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.promote_data_stream.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_alias.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_alias.json
index 2ceb76540bc04..1584dc58ee347 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_alias.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_alias.json
@@ -59,6 +59,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_data_lifecycle.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_data_lifecycle.json
index bdcdeddce8afd..f8909aef6d18e 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_data_lifecycle.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_data_lifecycle.json
@@ -49,6 +49,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_data_stream_options.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_data_stream_options.json
index 95aae8cbc0735..c6c8bde335fbe 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_data_stream_options.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_data_stream_options.json
@@ -49,6 +49,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_data_stream_settings.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_data_stream_settings.json
index 127e869df5817..e1b8668e7f75e 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_data_stream_settings.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_data_stream_settings.json
@@ -39,6 +39,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Period to wait for a connection to the master node"
       }
     },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_index_template.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_index_template.json
index 87ac5e038425c..1f6c05c94ac46 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_index_template.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_index_template.json
@@ -44,6 +44,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_mapping.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_mapping.json
index 31ff8ba7ccee1..c7b67b226e148 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_mapping.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_mapping.json
@@ -38,6 +38,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "ignore_unavailable": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_settings.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_settings.json
index ce38f97b01a23..e83b5f80d1bc3 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_settings.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_settings.json
@@ -39,6 +39,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_template.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_template.json
index cbf828ba498fc..e04b8f53bcb70 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_template.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.put_template.json
@@ -48,6 +48,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.rollover.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.rollover.json
index ce9bd0e1b1c81..c2b1d3472a040 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.rollover.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.rollover.json
@@ -57,6 +57,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "wait_for_active_shards": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.shrink.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.shrink.json
index 8a6b68ac4157d..84724909408e4 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.shrink.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.shrink.json
@@ -42,6 +42,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "wait_for_active_shards": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.simulate_index_template.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.simulate_index_template.json
index b0da96edc229c..78e2fe31f6763 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.simulate_index_template.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.simulate_index_template.json
@@ -43,6 +43,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "include_defaults": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.simulate_template.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.simulate_template.json
index 9613db9c3e1ce..94f5c05826864 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.simulate_template.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.simulate_template.json
@@ -49,6 +49,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "include_defaults": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.split.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.split.json
index 030ff4855b952..25cb26504c2ff 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.split.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.split.json
@@ -42,6 +42,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "wait_for_active_shards": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.unfreeze.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.unfreeze.json
index 6cec363385c53..1f3f432b88b47 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.unfreeze.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.unfreeze.json
@@ -38,6 +38,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "ignore_unavailable": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.update_aliases.json b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.update_aliases.json
index 3c938fcc7886c..73d382b4be124 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/indices.update_aliases.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/indices.update_aliases.json
@@ -31,6 +31,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.delete_geoip_database.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.delete_geoip_database.json
index 27dbcb9976218..911ec218439b8 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.delete_geoip_database.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.delete_geoip_database.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.delete_ip_location_database.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.delete_ip_location_database.json
index 2f6356dd3c711..26301c2205386 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.delete_ip_location_database.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.delete_ip_location_database.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.delete_pipeline.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.delete_pipeline.json
index 34fc71305e856..89c174bfdde1a 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.delete_pipeline.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.delete_pipeline.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.get_pipeline.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.get_pipeline.json
index 6829e095513ba..0c629c152d8ac 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.get_pipeline.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.get_pipeline.json
@@ -40,6 +40,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.put_geoip_database.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.put_geoip_database.json
index e6180bad589e7..7f96173f79667 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.put_geoip_database.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.put_geoip_database.json
@@ -33,6 +33,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.put_ip_location_database.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.put_ip_location_database.json
index 18051f7f8350e..51e3f579f0297 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.put_ip_location_database.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.put_ip_location_database.json
@@ -33,6 +33,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.put_pipeline.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.put_pipeline.json
index 32aad4d71afab..07ccaa6d94195 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.put_pipeline.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ingest.put_pipeline.json
@@ -37,6 +37,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/license.delete.json b/rest-api-spec/src/main/resources/rest-api-spec/api/license.delete.json
index 189b042f4127f..5ab828f52aed2 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/license.delete.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/license.delete.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for processing on master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/license.post.json b/rest-api-spec/src/main/resources/rest-api-spec/api/license.post.json
index fbd91320fcb58..614c3c1eb4d49 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/license.post.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/license.post.json
@@ -32,6 +32,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for processing on master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/license.post_start_basic.json b/rest-api-spec/src/main/resources/rest-api-spec/api/license.post_start_basic.json
index 4173963135712..61fa0753040e9 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/license.post_start_basic.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/license.post_start_basic.json
@@ -28,6 +28,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for processing on master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/license.post_start_trial.json b/rest-api-spec/src/main/resources/rest-api-spec/api/license.post_start_trial.json
index d674cb9718735..dfde0d51fa4b3 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/license.post_start_trial.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/license.post_start_trial.json
@@ -32,6 +32,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for processing on master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/ml.get_memory_stats.json b/rest-api-spec/src/main/resources/rest-api-spec/api/ml.get_memory_stats.json
index 114886928ddb5..548e0629ecc1c 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/ml.get_memory_stats.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/ml.get_memory_stats.json
@@ -36,6 +36,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/profiling.status.json b/rest-api-spec/src/main/resources/rest-api-spec/api/profiling.status.json
index a51b54364b13b..02c9945b88f71 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/profiling.status.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/profiling.status.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/put_script.json b/rest-api-spec/src/main/resources/rest-api-spec/api/put_script.json
index 7c08d071b1155..c3f7effd9796d 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/put_script.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/put_script.json
@@ -55,6 +55,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       },
       "context": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/search_shards.json b/rest-api-spec/src/main/resources/rest-api-spec/api/search_shards.json
index 128f5ee39e9c6..b3d0a2e2d9a64 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/search_shards.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/search_shards.json
@@ -70,6 +70,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/searchable_snapshots.mount.json b/rest-api-spec/src/main/resources/rest-api-spec/api/searchable_snapshots.mount.json
index 03f3a4f499aed..8c5c0d7634b4c 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/searchable_snapshots.mount.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/searchable_snapshots.mount.json
@@ -37,6 +37,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "wait_for_completion": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/security.get_settings.json b/rest-api-spec/src/main/resources/rest-api-spec/api/security.get_settings.json
index d4666fe7ee873..a8ecdd8370fe0 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/security.get_settings.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/security.get_settings.json
@@ -27,6 +27,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/security.update_settings.json b/rest-api-spec/src/main/resources/rest-api-spec/api/security.update_settings.json
index d145c1ed538b6..d1ae580cb8ac6 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/security.update_settings.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/security.update_settings.json
@@ -27,6 +27,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for connection to master"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/shutdown.delete_node.json b/rest-api-spec/src/main/resources/rest-api-spec/api/shutdown.delete_node.json
index 7615494503d81..724b5f0c16d72 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/shutdown.delete_node.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/shutdown.delete_node.json
@@ -33,6 +33,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/shutdown.get_node.json b/rest-api-spec/src/main/resources/rest-api-spec/api/shutdown.get_node.json
index 593c3f94431f6..04555e0beb855 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/shutdown.get_node.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/shutdown.get_node.json
@@ -40,6 +40,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for processing on master node"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/shutdown.put_node.json b/rest-api-spec/src/main/resources/rest-api-spec/api/shutdown.put_node.json
index fc14e739f50f4..e70492a778832 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/shutdown.put_node.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/shutdown.put_node.json
@@ -33,6 +33,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.delete_lifecycle.json b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.delete_lifecycle.json
index e56298a0ae228..7884045da94e6 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.delete_lifecycle.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.delete_lifecycle.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.execute_lifecycle.json b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.execute_lifecycle.json
index 313e8c6d7680f..81a8b9f19c709 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.execute_lifecycle.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.execute_lifecycle.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.execute_retention.json b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.execute_retention.json
index 7902472518d0f..ef9a8f686d544 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.execute_retention.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.execute_retention.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.get_lifecycle.json b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.get_lifecycle.json
index 85dd89f092a6e..362277f52fc8d 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.get_lifecycle.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.get_lifecycle.json
@@ -36,6 +36,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.get_stats.json b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.get_stats.json
index 70703e13e0ad3..f80738e260d02 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.get_stats.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.get_stats.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.get_status.json b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.get_status.json
index c7e8e5b11f7aa..d9ed8e056e885 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.get_status.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.get_status.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.put_lifecycle.json b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.put_lifecycle.json
index 47b7b2efc7c0b..d51e1f986c115 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.put_lifecycle.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.put_lifecycle.json
@@ -33,6 +33,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.start.json b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.start.json
index 20e4709ebbea6..9d83e1e6fa110 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.start.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.start.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for processing on master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.stop.json b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.stop.json
index 09bf39417d8af..23e50a36a696b 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/slm.stop.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/slm.stop.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Timeout for processing on master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.cleanup_repository.json b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.cleanup_repository.json
index a69ed70aebe31..81a6e33f4adb7 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.cleanup_repository.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.cleanup_repository.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.clone.json b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.clone.json
index 2334358d37d26..ba76b62eaf575 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.clone.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.clone.json
@@ -41,6 +41,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       }
     },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.create.json b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.create.json
index 34fd27383007f..7e2d336762230 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.create.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.create.json
@@ -38,6 +38,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "wait_for_completion": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.create_repository.json b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.create_repository.json
index a65aece6718b5..a703ade8811f9 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.create_repository.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.create_repository.json
@@ -34,6 +34,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.delete.json b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.delete.json
index bd2ecd2ef5828..cbf45cbe9a304 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.delete.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.delete.json
@@ -34,6 +34,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "wait_for_completion": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.delete_repository.json b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.delete_repository.json
index 9c99b8130d124..fdc879aabe7d5 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.delete_repository.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.delete_repository.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.get.json b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.get.json
index 31f13d5de0d1d..82d3c022cfb6f 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.get.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.get.json
@@ -34,6 +34,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "ignore_unavailable": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.get_repository.json b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.get_repository.json
index bc4bd2a50d924..6088fa97d721f 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.get_repository.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.get_repository.json
@@ -36,6 +36,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "local": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.restore.json b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.restore.json
index 4f71b387de603..08e499c44182b 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.restore.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.restore.json
@@ -37,6 +37,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "wait_for_completion": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.status.json b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.status.json
index add6dd2abc106..2df6466e176d9 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.status.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.status.json
@@ -52,6 +52,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "ignore_unavailable": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.verify_repository.json b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.verify_repository.json
index 57dd137f3af92..9c13cb5bce52d 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.verify_repository.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/snapshot.verify_repository.json
@@ -30,6 +30,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Explicit operation timeout for connection to master node"
       },
       "timeout": {
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/streams.logs_disable.json b/rest-api-spec/src/main/resources/rest-api-spec/api/streams.logs_disable.json
index 20f0e0c2feba6..a003447be4001 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/streams.logs_disable.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/streams.logs_disable.json
@@ -30,6 +30,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "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."
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/streams.logs_enable.json b/rest-api-spec/src/main/resources/rest-api-spec/api/streams.logs_enable.json
index adaf544d9b604..3db4182d32b18 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/streams.logs_enable.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/streams.logs_enable.json
@@ -30,6 +30,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "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."
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/watcher.get_settings.json b/rest-api-spec/src/main/resources/rest-api-spec/api/watcher.get_settings.json
index 11568b55d8c19..e5af0fa2f2946 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/watcher.get_settings.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/watcher.get_settings.json
@@ -27,6 +27,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/watcher.start.json b/rest-api-spec/src/main/resources/rest-api-spec/api/watcher.start.json
index 1498359e10610..27cfde1c4d0c9 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/watcher.start.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/watcher.start.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/watcher.stop.json b/rest-api-spec/src/main/resources/rest-api-spec/api/watcher.stop.json
index 1eb3931e2ef95..d9470707c2047 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/watcher.stop.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/watcher.stop.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     }
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/watcher.update_settings.json b/rest-api-spec/src/main/resources/rest-api-spec/api/watcher.update_settings.json
index f794cbbe8b496..f3ba00a44ffd8 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/watcher.update_settings.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/watcher.update_settings.json
@@ -31,6 +31,7 @@
       },
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for connection to master"
       }
     },
diff --git a/rest-api-spec/src/main/resources/rest-api-spec/api/xpack.usage.json b/rest-api-spec/src/main/resources/rest-api-spec/api/xpack.usage.json
index bbc2a12c6b7c2..35fea64f42156 100644
--- a/rest-api-spec/src/main/resources/rest-api-spec/api/xpack.usage.json
+++ b/rest-api-spec/src/main/resources/rest-api-spec/api/xpack.usage.json
@@ -24,6 +24,7 @@
     "params": {
       "master_timeout": {
         "type": "time",
+        "default": "30s",
         "description": "Specify timeout for watch write operation"
       }
     }