diff --git a/elasticsearch-api/lib/elasticsearch/api/actions/esql/async_query_delete.rb b/elasticsearch-api/lib/elasticsearch/api/actions/esql/async_query_delete.rb
new file mode 100644
index 0000000000..f5f47a074b
--- /dev/null
+++ b/elasticsearch-api/lib/elasticsearch/api/actions/esql/async_query_delete.rb
@@ -0,0 +1,60 @@
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+# Auto generated from build hash f284cc16f4d4b4289bc679aa1529bb504190fe80
+# @see https://github.com/elastic/elasticsearch/tree/main/rest-api-spec
+#
+module Elasticsearch
+  module API
+    module Esql
+      module Actions
+        # Delete an async query request given its ID.
+        #
+        # @option arguments [String] :id The async query ID
+        # @option arguments [Hash] :headers Custom HTTP headers
+        #
+        # @see https://www.elastic.co/guide/en/elasticsearch/reference/8.17/esql-async-query-delete-api.html
+        #
+        def async_query_delete(arguments = {})
+          request_opts = { endpoint: arguments[:endpoint] || 'esql.async_query_delete' }
+
+          defined_params = [:id].each_with_object({}) do |variable, set_variables|
+            set_variables[variable] = arguments[variable] if arguments.key?(variable)
+          end
+          request_opts[:defined_params] = defined_params unless defined_params.empty?
+
+          raise ArgumentError, "Required argument 'id' missing" unless arguments[:id]
+
+          arguments = arguments.clone
+          headers = arguments.delete(:headers) || {}
+
+          body = nil
+
+          _id = arguments.delete(:id)
+
+          method = Elasticsearch::API::HTTP_DELETE
+          path   = "_query/async/#{Utils.__listify(_id)}"
+          params = {}
+
+          Elasticsearch::API::Response.new(
+            perform_request(method, path, params, body, headers, request_opts)
+          )
+        end
+      end
+    end
+  end
+end
diff --git a/elasticsearch-api/lib/elasticsearch/api/actions/indices/get_data_lifecycle_stats.rb b/elasticsearch-api/lib/elasticsearch/api/actions/indices/get_data_lifecycle_stats.rb
new file mode 100644
index 0000000000..9fb27a6fc7
--- /dev/null
+++ b/elasticsearch-api/lib/elasticsearch/api/actions/indices/get_data_lifecycle_stats.rb
@@ -0,0 +1,50 @@
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+# Auto generated from build hash f284cc16f4d4b4289bc679aa1529bb504190fe80
+# @see https://github.com/elastic/elasticsearch/tree/main/rest-api-spec
+#
+module Elasticsearch
+  module API
+    module Indices
+      module Actions
+        # Get data stream lifecycle statistics.
+        #
+        # @option arguments [Hash] :headers Custom HTTP headers
+        #
+        # @see https://www.elastic.co/guide/en/elasticsearch/reference/8.17/data-streams-get-lifecycle-stats.html
+        #
+        def get_data_lifecycle_stats(arguments = {})
+          request_opts = { endpoint: arguments[:endpoint] || 'indices.get_data_lifecycle_stats' }
+
+          arguments = arguments.clone
+          headers = arguments.delete(:headers) || {}
+
+          body   = nil
+
+          method = Elasticsearch::API::HTTP_GET
+          path   = '_lifecycle/stats'
+          params = {}
+
+          Elasticsearch::API::Response.new(
+            perform_request(method, path, params, body, headers, request_opts)
+          )
+        end
+      end
+    end
+  end
+end
diff --git a/elasticsearch-api/lib/elasticsearch/api/actions/inference/update.rb b/elasticsearch-api/lib/elasticsearch/api/actions/inference/update.rb
new file mode 100644
index 0000000000..b7e8bb6d44
--- /dev/null
+++ b/elasticsearch-api/lib/elasticsearch/api/actions/inference/update.rb
@@ -0,0 +1,68 @@
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+# Auto generated from build hash f284cc16f4d4b4289bc679aa1529bb504190fe80
+# @see https://github.com/elastic/elasticsearch/tree/main/rest-api-spec
+#
+module Elasticsearch
+  module API
+    module Inference
+      module Actions
+        # Update inference
+        #
+        # @option arguments [String] :inference_id The inference Id
+        # @option arguments [String] :task_type The task type
+        # @option arguments [Hash] :headers Custom HTTP headers
+        # @option arguments [Hash] :body The inference endpoint's task and service settings
+        #
+        # @see https://www.elastic.co/guide/en/elasticsearch/reference/8.17/update-inference-api.html
+        #
+        def update(arguments = {})
+          request_opts = { endpoint: arguments[:endpoint] || 'inference.update' }
+
+          defined_params = %i[inference_id task_type].each_with_object({}) do |variable, set_variables|
+            set_variables[variable] = arguments[variable] if arguments.key?(variable)
+          end
+          request_opts[:defined_params] = defined_params unless defined_params.empty?
+
+          raise ArgumentError, "Required argument 'inference_id' missing" unless arguments[:inference_id]
+
+          arguments = arguments.clone
+          headers = arguments.delete(:headers) || {}
+
+          body = arguments.delete(:body)
+
+          _inference_id = arguments.delete(:inference_id)
+
+          _task_type = arguments.delete(:task_type)
+
+          method = Elasticsearch::API::HTTP_POST
+          path   = if _task_type && _inference_id
+                     "_inference/#{Utils.__listify(_task_type)}/#{Utils.__listify(_inference_id)}/_update"
+                   else
+                     "_inference/#{Utils.__listify(_inference_id)}/_update"
+                   end
+          params = {}
+
+          Elasticsearch::API::Response.new(
+            perform_request(method, path, params, body, headers, request_opts)
+          )
+        end
+      end
+    end
+  end
+end
diff --git a/elasticsearch-api/lib/elasticsearch/api/actions/security/delegate_pki.rb b/elasticsearch-api/lib/elasticsearch/api/actions/security/delegate_pki.rb
new file mode 100644
index 0000000000..363bac1d8a
--- /dev/null
+++ b/elasticsearch-api/lib/elasticsearch/api/actions/security/delegate_pki.rb
@@ -0,0 +1,53 @@
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+# Auto generated from build hash f284cc16f4d4b4289bc679aa1529bb504190fe80
+# @see https://github.com/elastic/elasticsearch/tree/main/rest-api-spec
+#
+module Elasticsearch
+  module API
+    module Security
+      module Actions
+        # Delegate PKI authentication.
+        #
+        # @option arguments [Hash] :headers Custom HTTP headers
+        # @option arguments [Hash] :body The X509Certificate chain. (*Required*)
+        #
+        # @see https://www.elastic.co/guide/en/elasticsearch/reference/8.17/security-api-delegate-pki-authentication.html
+        #
+        def delegate_pki(arguments = {})
+          request_opts = { endpoint: arguments[:endpoint] || 'security.delegate_pki' }
+
+          raise ArgumentError, "Required argument 'body' missing" unless arguments[:body]
+
+          arguments = arguments.clone
+          headers = arguments.delete(:headers) || {}
+
+          body   = arguments.delete(:body)
+
+          method = Elasticsearch::API::HTTP_POST
+          path   = '_security/delegate_pki'
+          params = {}
+
+          Elasticsearch::API::Response.new(
+            perform_request(method, path, params, body, headers, request_opts)
+          )
+        end
+      end
+    end
+  end
+end
diff --git a/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/delete_lifecycle.rb b/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/delete_lifecycle.rb
index 4dfb4250af..a02ecd4314 100644
--- a/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/delete_lifecycle.rb
+++ b/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/delete_lifecycle.rb
@@ -25,6 +25,8 @@ module Actions
         # Deletes an existing snapshot lifecycle policy.
         #
         # @option arguments [String] :policy_id The id of the snapshot lifecycle policy to remove
+        # @option arguments [Time] :master_timeout Explicit operation timeout for connection to master node
+        # @option arguments [Time] :timeout Explicit operation timeout
         # @option arguments [Hash] :headers Custom HTTP headers
         #
         # @see https://www.elastic.co/guide/en/elasticsearch/reference/8.17/slm-api-delete-policy.html
@@ -48,7 +50,7 @@ def delete_lifecycle(arguments = {})
 
           method = Elasticsearch::API::HTTP_DELETE
           path   = "_slm/policy/#{Utils.__listify(_policy_id)}"
-          params = {}
+          params = Utils.process_params(arguments)
 
           Elasticsearch::API::Response.new(
             perform_request(method, path, params, body, headers, request_opts)
diff --git a/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/execute_lifecycle.rb b/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/execute_lifecycle.rb
index 27b8948e4b..dece6f8a20 100644
--- a/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/execute_lifecycle.rb
+++ b/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/execute_lifecycle.rb
@@ -25,6 +25,8 @@ module Actions
         # Immediately creates a snapshot according to the lifecycle policy, without waiting for the scheduled time.
         #
         # @option arguments [String] :policy_id The id of the snapshot lifecycle policy to be executed
+        # @option arguments [Time] :master_timeout Explicit operation timeout for connection to master node
+        # @option arguments [Time] :timeout Explicit operation timeout
         # @option arguments [Hash] :headers Custom HTTP headers
         #
         # @see https://www.elastic.co/guide/en/elasticsearch/reference/8.17/slm-api-execute-lifecycle.html
@@ -48,7 +50,7 @@ def execute_lifecycle(arguments = {})
 
           method = Elasticsearch::API::HTTP_PUT
           path   = "_slm/policy/#{Utils.__listify(_policy_id)}/_execute"
-          params = {}
+          params = Utils.process_params(arguments)
 
           Elasticsearch::API::Response.new(
             perform_request(method, path, params, body, headers, request_opts)
diff --git a/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/execute_retention.rb b/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/execute_retention.rb
index 63f5386b30..e74c2cd77c 100644
--- a/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/execute_retention.rb
+++ b/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/execute_retention.rb
@@ -24,6 +24,8 @@ module SnapshotLifecycleManagement
       module Actions
         # Deletes any snapshots that are expired according to the policy's retention rules.
         #
+        # @option arguments [Time] :master_timeout Explicit operation timeout for connection to master node
+        # @option arguments [Time] :timeout Explicit operation timeout
         # @option arguments [Hash] :headers Custom HTTP headers
         #
         # @see https://www.elastic.co/guide/en/elasticsearch/reference/8.17/slm-api-execute-retention.html
@@ -38,7 +40,7 @@ def execute_retention(arguments = {})
 
           method = Elasticsearch::API::HTTP_POST
           path   = '_slm/_execute_retention'
-          params = {}
+          params = Utils.process_params(arguments)
 
           Elasticsearch::API::Response.new(
             perform_request(method, path, params, body, headers, request_opts)
diff --git a/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/get_lifecycle.rb b/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/get_lifecycle.rb
index 8e21106dfa..693ed226e2 100644
--- a/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/get_lifecycle.rb
+++ b/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/get_lifecycle.rb
@@ -25,6 +25,8 @@ module Actions
         # Retrieves one or more snapshot lifecycle policy definitions and information about the latest snapshot attempts.
         #
         # @option arguments [List] :policy_id Comma-separated list of snapshot lifecycle policies to retrieve
+        # @option arguments [Time] :master_timeout Explicit operation timeout for connection to master node
+        # @option arguments [Time] :timeout Explicit operation timeout
         # @option arguments [Hash] :headers Custom HTTP headers
         #
         # @see https://www.elastic.co/guide/en/elasticsearch/reference/8.17/slm-api-get-policy.html
@@ -50,7 +52,7 @@ def get_lifecycle(arguments = {})
                    else
                      '_slm/policy'
                    end
-          params = {}
+          params = Utils.process_params(arguments)
 
           Elasticsearch::API::Response.new(
             perform_request(method, path, params, body, headers, request_opts)
diff --git a/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/get_stats.rb b/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/get_stats.rb
index d669f33cdc..6021403117 100644
--- a/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/get_stats.rb
+++ b/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/get_stats.rb
@@ -24,6 +24,8 @@ module SnapshotLifecycleManagement
       module Actions
         # Returns global and policy-level statistics about actions taken by snapshot lifecycle management.
         #
+        # @option arguments [Time] :master_timeout Explicit operation timeout for connection to master node
+        # @option arguments [Time] :timeout Explicit operation timeout
         # @option arguments [Hash] :headers Custom HTTP headers
         #
         # @see https://www.elastic.co/guide/en/elasticsearch/reference/8.17/slm-api-get-stats.html
@@ -38,7 +40,7 @@ def get_stats(arguments = {})
 
           method = Elasticsearch::API::HTTP_GET
           path   = '_slm/stats'
-          params = {}
+          params = Utils.process_params(arguments)
 
           Elasticsearch::API::Response.new(
             perform_request(method, path, params, body, headers, request_opts)
diff --git a/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/get_status.rb b/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/get_status.rb
index 67d52da21c..8a0ab147f2 100644
--- a/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/get_status.rb
+++ b/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/get_status.rb
@@ -24,6 +24,8 @@ module SnapshotLifecycleManagement
       module Actions
         # Retrieves the status of snapshot lifecycle management (SLM).
         #
+        # @option arguments [Time] :master_timeout Explicit operation timeout for connection to master node
+        # @option arguments [Time] :timeout Explicit operation timeout
         # @option arguments [Hash] :headers Custom HTTP headers
         #
         # @see https://www.elastic.co/guide/en/elasticsearch/reference/8.17/slm-api-get-status.html
@@ -38,7 +40,7 @@ def get_status(arguments = {})
 
           method = Elasticsearch::API::HTTP_GET
           path   = '_slm/status'
-          params = {}
+          params = Utils.process_params(arguments)
 
           Elasticsearch::API::Response.new(
             perform_request(method, path, params, body, headers, request_opts)
diff --git a/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/put_lifecycle.rb b/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/put_lifecycle.rb
index a434ede1b2..c9442b0298 100644
--- a/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/put_lifecycle.rb
+++ b/elasticsearch-api/lib/elasticsearch/api/actions/snapshot_lifecycle_management/put_lifecycle.rb
@@ -25,6 +25,8 @@ module Actions
         # Creates or updates a snapshot lifecycle policy.
         #
         # @option arguments [String] :policy_id The id of the snapshot lifecycle policy
+        # @option arguments [Time] :master_timeout Explicit operation timeout for connection to master node
+        # @option arguments [Time] :timeout Explicit operation timeout
         # @option arguments [Hash] :headers Custom HTTP headers
         # @option arguments [Hash] :body The snapshot lifecycle policy definition to register
         #
@@ -49,7 +51,7 @@ def put_lifecycle(arguments = {})
 
           method = Elasticsearch::API::HTTP_PUT
           path   = "_slm/policy/#{Utils.__listify(_policy_id)}"
-          params = {}
+          params = Utils.process_params(arguments)
 
           Elasticsearch::API::Response.new(
             perform_request(method, path, params, body, headers, request_opts)
diff --git a/elasticsearch-api/spec/elasticsearch/api/actions/esql/async_query_delete_spec.rb b/elasticsearch-api/spec/elasticsearch/api/actions/esql/async_query_delete_spec.rb
new file mode 100644
index 0000000000..2eb85ef6eb
--- /dev/null
+++ b/elasticsearch-api/spec/elasticsearch/api/actions/esql/async_query_delete_spec.rb
@@ -0,0 +1,35 @@
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+require 'spec_helper'
+
+describe 'client.esql#async_query_delete' do
+  let(:expected_args) do
+    [
+      'DELETE',
+      '_query/async/foo',
+      {},
+      nil,
+      {},
+      { defined_params: {id: 'foo' }, endpoint: 'esql.async_query_delete' }
+    ]
+  end
+
+  it 'performs the request' do
+    expect(client_double.esql.async_query_delete(id: 'foo')).to be_a Elasticsearch::API::Response
+  end
+end
diff --git a/elasticsearch-api/spec/elasticsearch/api/actions/indices/get_data_lifecycle_stats_spec.rb b/elasticsearch-api/spec/elasticsearch/api/actions/indices/get_data_lifecycle_stats_spec.rb
new file mode 100644
index 0000000000..8938b5a156
--- /dev/null
+++ b/elasticsearch-api/spec/elasticsearch/api/actions/indices/get_data_lifecycle_stats_spec.rb
@@ -0,0 +1,35 @@
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+require 'spec_helper'
+
+describe 'client.indices#get_data_lifecycle_stats' do
+  let(:expected_args) do
+    [
+      'GET',
+      '_lifecycle/stats',
+      {},
+      nil,
+      {},
+      { endpoint: 'indices.get_data_lifecycle_stats' }
+    ]
+  end
+
+  it 'performs the request' do
+    expect(client_double.indices.get_data_lifecycle_stats).to be_a Elasticsearch::API::Response
+  end
+end
diff --git a/elasticsearch-api/spec/elasticsearch/api/actions/inference/update_spec.rb b/elasticsearch-api/spec/elasticsearch/api/actions/inference/update_spec.rb
new file mode 100644
index 0000000000..a8fdbf1b7a
--- /dev/null
+++ b/elasticsearch-api/spec/elasticsearch/api/actions/inference/update_spec.rb
@@ -0,0 +1,36 @@
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+require 'spec_helper'
+
+describe 'client#inference.update' do
+  let(:expected_args) do
+    [
+      'POST',
+      '_inference/foo/bar/_update',
+      {},
+      nil,
+      {},
+      { defined_params: { inference_id: 'bar', task_type: 'foo' },
+        endpoint: 'inference.update' }
+    ]
+  end
+
+  it 'performs the request' do
+    expect(client_double.inference.update(task_type: 'foo', inference_id: 'bar')).to be_a Elasticsearch::API::Response
+  end
+end
diff --git a/elasticsearch-api/spec/elasticsearch/api/actions/security/delegate_pki_spec.rb b/elasticsearch-api/spec/elasticsearch/api/actions/security/delegate_pki_spec.rb
new file mode 100644
index 0000000000..d21418f212
--- /dev/null
+++ b/elasticsearch-api/spec/elasticsearch/api/actions/security/delegate_pki_spec.rb
@@ -0,0 +1,39 @@
+# Licensed to Elasticsearch B.V. under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch B.V. licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+require 'spec_helper'
+
+describe 'client#security#delegate_pki' do
+  let(:expected_args) do
+    [
+      'POST',
+      '_security/delegate_pki',
+      params,
+      {},
+      {},
+      { endpoint: 'security.delegate_pki' }
+    ]
+  end
+
+  let(:params) do
+    {}
+  end
+
+  it 'performs the request' do
+    expect(client_double.security.delegate_pki(body: {})).to be_a Elasticsearch::API::Response
+  end
+end