diff --git a/manifests/api.pp b/manifests/api.pp
index a0bb939b..2ae9e45a 100644
--- a/manifests/api.pp
+++ b/manifests/api.pp
@@ -65,6 +65,10 @@
 #   HTTPProxyToWSGI middleware.
 #   Defaults to $::os_service_default.
 #
+# [*max_request_body_size*]
+#   (Optional) Set max request body size
+#   Defaults to $::os_service_default.
+#
 class ironic::api (
   $package_ensure               = 'present',
   $enabled                      = true,
@@ -75,6 +79,7 @@ class ironic::api (
   $workers                      = $::os_service_default,
   $public_endpoint              = $::os_service_default,
   $enable_proxy_headers_parsing = $::os_service_default,
+  $max_request_body_size        = $::os_service_default,
 ) inherits ironic::params {
 
   include ::ironic::deps
@@ -135,6 +140,7 @@ standalone service, or httpd for being run by a httpd server")
 
   oslo::middleware { 'ironic_config':
     enable_proxy_headers_parsing => $enable_proxy_headers_parsing,
+    max_request_body_size        => $max_request_body_size,
   }
 
 }
diff --git a/releasenotes/notes/max_request_body_size-9d788f1b7a9a61f7.yaml b/releasenotes/notes/max_request_body_size-9d788f1b7a9a61f7.yaml
new file mode 100644
index 00000000..f29fec52
--- /dev/null
+++ b/releasenotes/notes/max_request_body_size-9d788f1b7a9a61f7.yaml
@@ -0,0 +1,5 @@
+---
+features:
+  - |
+    Add support to configure `[oslo_middleware]/max_request_body_size` with
+    `$max_request_body_size`.
diff --git a/spec/classes/ironic_api_spec.rb b/spec/classes/ironic_api_spec.rb
index 2e3a4c7a..0999f383 100644
--- a/spec/classes/ironic_api_spec.rb
+++ b/spec/classes/ironic_api_spec.rb
@@ -71,6 +71,7 @@ describe 'ironic::api' do
       is_expected.to contain_ironic_config('api/public_endpoint').with_value('<SERVICE DEFAULT>')
       is_expected.to contain_oslo__middleware('ironic_config').with(
         :enable_proxy_headers_parsing => '<SERVICE DEFAULT>',
+        :max_request_body_size        => '<SERVICE DEFAULT>',
       )
     end
 
@@ -103,6 +104,16 @@ describe 'ironic::api' do
       )}
     end
 
+    context 'with max_request_body_size' do
+      before do
+        params.merge!({:max_request_body_size => '102400' })
+      end
+
+      it { is_expected.to contain_oslo__middleware('ironic_config').with(
+        :max_request_body_size => '102400',
+      )}
+    end
+
     context 'when running ironic-api in wsgi' do
       before do
         params.merge!({ :service_name => 'httpd' })