diff --git a/clients/client-amp/src/protocols/Aws_restJson1.ts b/clients/client-amp/src/protocols/Aws_restJson1.ts
index a775f08eb659..dcc9fa1b6b01 100644
--- a/clients/client-amp/src/protocols/Aws_restJson1.ts
+++ b/clients/client-amp/src/protocols/Aws_restJson1.ts
@@ -440,12 +440,9 @@ export const se_GetDefaultScraperConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/scraperconfiguration");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-api-gateway/src/protocols/Aws_restJson1.ts b/clients/client-api-gateway/src/protocols/Aws_restJson1.ts
index 749f99dfec6b..8a45e15e28b8 100644
--- a/clients/client-api-gateway/src/protocols/Aws_restJson1.ts
+++ b/clients/client-api-gateway/src/protocols/Aws_restJson1.ts
@@ -1124,12 +1124,9 @@ export const se_GetAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/account");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-application-signals/src/protocols/Aws_restJson1.ts b/clients/client-application-signals/src/protocols/Aws_restJson1.ts
index 8d700dc7f8ad..43793944947a 100644
--- a/clients/client-application-signals/src/protocols/Aws_restJson1.ts
+++ b/clients/client-application-signals/src/protocols/Aws_restJson1.ts
@@ -367,12 +367,9 @@ export const se_StartDiscoveryCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/start-discovery");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-artifact/src/protocols/Aws_restJson1.ts b/clients/client-artifact/src/protocols/Aws_restJson1.ts
index 55812cfe4738..f6301dad9e8f 100644
--- a/clients/client-artifact/src/protocols/Aws_restJson1.ts
+++ b/clients/client-artifact/src/protocols/Aws_restJson1.ts
@@ -50,12 +50,9 @@ export const se_GetAccountSettingsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/v1/account-settings/get");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-auditmanager/src/protocols/Aws_restJson1.ts b/clients/client-auditmanager/src/protocols/Aws_restJson1.ts
index 2a5699020cf2..1626ba901c3e 100644
--- a/clients/client-auditmanager/src/protocols/Aws_restJson1.ts
+++ b/clients/client-auditmanager/src/protocols/Aws_restJson1.ts
@@ -593,12 +593,9 @@ export const se_DeregisterAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/account/deregisterAccount");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -656,12 +653,9 @@ export const se_GetAccountStatusCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/account/status");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -901,12 +895,9 @@ export const se_GetInsightsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/insights");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -935,12 +926,9 @@ export const se_GetOrganizationAdminAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/account/organizationAdminAccount");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -953,12 +941,9 @@ export const se_GetServicesInScopeCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/services");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-backup/src/protocols/Aws_restJson1.ts b/clients/client-backup/src/protocols/Aws_restJson1.ts
index a900f89a5f5f..57734efaf34e 100644
--- a/clients/client-backup/src/protocols/Aws_restJson1.ts
+++ b/clients/client-backup/src/protocols/Aws_restJson1.ts
@@ -835,12 +835,9 @@ export const se_DescribeGlobalSettingsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/global-settings");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -889,12 +886,9 @@ export const se_DescribeRegionSettingsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/account-settings");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1216,12 +1210,9 @@ export const se_GetSupportedResourceTypesCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/supported-resource-types");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-bedrock/src/protocols/Aws_restJson1.ts b/clients/client-bedrock/src/protocols/Aws_restJson1.ts
index e95b3c99f97f..efb53485552b 100644
--- a/clients/client-bedrock/src/protocols/Aws_restJson1.ts
+++ b/clients/client-bedrock/src/protocols/Aws_restJson1.ts
@@ -350,12 +350,9 @@ export const se_DeleteModelInvocationLoggingConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/logging/modelinvocations");
   let body: any;
-  body = "";
   b.m("DELETE").h(headers).b(body);
   return b.build();
 };
@@ -467,12 +464,9 @@ export const se_GetModelInvocationLoggingConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/logging/modelinvocations");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-chatbot/src/protocols/Aws_restJson1.ts b/clients/client-chatbot/src/protocols/Aws_restJson1.ts
index aaf9d11ef960..3a7223836699 100644
--- a/clients/client-chatbot/src/protocols/Aws_restJson1.ts
+++ b/clients/client-chatbot/src/protocols/Aws_restJson1.ts
@@ -505,12 +505,9 @@ export const se_GetAccountPreferencesCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/get-account-preferences");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-chime-sdk-messaging/src/protocols/Aws_restJson1.ts b/clients/client-chime-sdk-messaging/src/protocols/Aws_restJson1.ts
index a1813c46d160..9eb84b7a7750 100644
--- a/clients/client-chime-sdk-messaging/src/protocols/Aws_restJson1.ts
+++ b/clients/client-chime-sdk-messaging/src/protocols/Aws_restJson1.ts
@@ -787,12 +787,9 @@ export const se_GetMessagingSessionEndpointCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/endpoints/messaging-session");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-chime-sdk-voice/src/protocols/Aws_restJson1.ts b/clients/client-chime-sdk-voice/src/protocols/Aws_restJson1.ts
index 6c3443cf8dd9..a782bd26ea0d 100644
--- a/clients/client-chime-sdk-voice/src/protocols/Aws_restJson1.ts
+++ b/clients/client-chime-sdk-voice/src/protocols/Aws_restJson1.ts
@@ -1004,12 +1004,9 @@ export const se_GetGlobalSettingsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/settings");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1054,12 +1051,9 @@ export const se_GetPhoneNumberSettingsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/settings/phone-number");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1366,12 +1360,9 @@ export const se_ListAvailableVoiceConnectorRegionsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/voice-connector-regions");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-chime/src/protocols/Aws_restJson1.ts b/clients/client-chime/src/protocols/Aws_restJson1.ts
index e7d78ab4a69d..5c7255dee4d0 100644
--- a/clients/client-chime/src/protocols/Aws_restJson1.ts
+++ b/clients/client-chime/src/protocols/Aws_restJson1.ts
@@ -2678,12 +2678,9 @@ export const se_GetGlobalSettingsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/settings");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -2728,12 +2725,9 @@ export const se_GetMessagingSessionEndpointCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/endpoints/messaging-session");
   let body: any;
-  body = "";
   let { hostname: resolvedHostname } = await context.endpoint();
   if (context.disableHostPrefix !== true) {
     resolvedHostname = "messaging-" + resolvedHostname;
@@ -2786,12 +2780,9 @@ export const se_GetPhoneNumberSettingsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/settings/phone-number");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-codecatalyst/src/protocols/Aws_restJson1.ts b/clients/client-codecatalyst/src/protocols/Aws_restJson1.ts
index d07fc0039cb2..98504d9bc0bf 100644
--- a/clients/client-codecatalyst/src/protocols/Aws_restJson1.ts
+++ b/clients/client-codecatalyst/src/protocols/Aws_restJson1.ts
@@ -964,12 +964,9 @@ export const se_VerifySessionCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/session");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-codeguru-security/src/protocols/Aws_restJson1.ts b/clients/client-codeguru-security/src/protocols/Aws_restJson1.ts
index 9d7800d2da69..7fefe07dec42 100644
--- a/clients/client-codeguru-security/src/protocols/Aws_restJson1.ts
+++ b/clients/client-codeguru-security/src/protocols/Aws_restJson1.ts
@@ -154,12 +154,9 @@ export const se_GetAccountConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/accountConfiguration/get");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-detective/src/protocols/Aws_restJson1.ts b/clients/client-detective/src/protocols/Aws_restJson1.ts
index 44dfd38181c6..4a8a8fc62372 100644
--- a/clients/client-detective/src/protocols/Aws_restJson1.ts
+++ b/clients/client-detective/src/protocols/Aws_restJson1.ts
@@ -309,12 +309,9 @@ export const se_DisableOrganizationAdminAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/orgs/disableAdminAccount");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-devops-guru/src/protocols/Aws_restJson1.ts b/clients/client-devops-guru/src/protocols/Aws_restJson1.ts
index 2b41a71421a6..c5ac3646a2e6 100644
--- a/clients/client-devops-guru/src/protocols/Aws_restJson1.ts
+++ b/clients/client-devops-guru/src/protocols/Aws_restJson1.ts
@@ -249,12 +249,9 @@ export const se_DescribeAccountHealthCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/accounts/health");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -309,12 +306,9 @@ export const se_DescribeEventSourcesConfigCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/event-sources");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -461,12 +455,9 @@ export const se_DescribeServiceIntegrationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/service-integrations");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-drs/src/protocols/Aws_restJson1.ts b/clients/client-drs/src/protocols/Aws_restJson1.ts
index d9cfb2ed078e..b65459300323 100644
--- a/clients/client-drs/src/protocols/Aws_restJson1.ts
+++ b/clients/client-drs/src/protocols/Aws_restJson1.ts
@@ -837,12 +837,9 @@ export const se_InitializeServiceCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/InitializeService");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-elastic-inference/src/protocols/Aws_restJson1.ts b/clients/client-elastic-inference/src/protocols/Aws_restJson1.ts
index 3538a0917cb2..73a92d6c69ca 100644
--- a/clients/client-elastic-inference/src/protocols/Aws_restJson1.ts
+++ b/clients/client-elastic-inference/src/protocols/Aws_restJson1.ts
@@ -98,12 +98,9 @@ export const se_DescribeAcceleratorTypesCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/describe-accelerator-types");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-elasticsearch-service/src/protocols/Aws_restJson1.ts b/clients/client-elasticsearch-service/src/protocols/Aws_restJson1.ts
index f155fcccca95..a3e5a192f33c 100644
--- a/clients/client-elasticsearch-service/src/protocols/Aws_restJson1.ts
+++ b/clients/client-elasticsearch-service/src/protocols/Aws_restJson1.ts
@@ -519,12 +519,9 @@ export const se_DeleteElasticsearchServiceRoleCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/2015-01-01/es/role");
   let body: any;
-  body = "";
   b.m("DELETE").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-greengrass/src/protocols/Aws_restJson1.ts b/clients/client-greengrass/src/protocols/Aws_restJson1.ts
index 248b9eac08e0..f9232c2fc103 100644
--- a/clients/client-greengrass/src/protocols/Aws_restJson1.ts
+++ b/clients/client-greengrass/src/protocols/Aws_restJson1.ts
@@ -1048,12 +1048,9 @@ export const se_DisassociateServiceRoleFromAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/greengrass/servicerole");
   let body: any;
-  body = "";
   b.m("DELETE").h(headers).b(body);
   return b.build();
 };
@@ -1412,12 +1409,9 @@ export const se_GetServiceRoleForAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/greengrass/servicerole");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-greengrassv2/src/protocols/Aws_restJson1.ts b/clients/client-greengrassv2/src/protocols/Aws_restJson1.ts
index 4f6d5a0eb555..0f81697c64bc 100644
--- a/clients/client-greengrassv2/src/protocols/Aws_restJson1.ts
+++ b/clients/client-greengrassv2/src/protocols/Aws_restJson1.ts
@@ -361,12 +361,9 @@ export const se_DisassociateServiceRoleFromAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/greengrass/servicerole");
   let body: any;
-  body = "";
   b.m("DELETE").h(headers).b(body);
   return b.build();
 };
@@ -468,12 +465,9 @@ export const se_GetServiceRoleForAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/greengrass/servicerole");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-guardduty/src/protocols/Aws_restJson1.ts b/clients/client-guardduty/src/protocols/Aws_restJson1.ts
index fc34f437f099..aea635b4839a 100644
--- a/clients/client-guardduty/src/protocols/Aws_restJson1.ts
+++ b/clients/client-guardduty/src/protocols/Aws_restJson1.ts
@@ -1163,12 +1163,9 @@ export const se_GetInvitationsCountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/invitation/count");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1292,12 +1289,9 @@ export const se_GetOrganizationStatisticsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/organization/statistics");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-inspector2/src/protocols/Aws_restJson1.ts b/clients/client-inspector2/src/protocols/Aws_restJson1.ts
index 19cf3eebbd68..b9927b914ded 100644
--- a/clients/client-inspector2/src/protocols/Aws_restJson1.ts
+++ b/clients/client-inspector2/src/protocols/Aws_restJson1.ts
@@ -658,12 +658,9 @@ export const se_DescribeOrganizationConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/organizationconfiguration/describe");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -840,12 +837,9 @@ export const se_GetConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/configuration/get");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -858,12 +852,9 @@ export const se_GetDelegatedAdminAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/delegatedadminaccounts/get");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -876,12 +867,9 @@ export const se_GetEc2DeepInspectionConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/ec2deepinspectionconfiguration/get");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-iot-events/src/protocols/Aws_restJson1.ts b/clients/client-iot-events/src/protocols/Aws_restJson1.ts
index fb2cef3321c4..9fc8956f8ece 100644
--- a/clients/client-iot-events/src/protocols/Aws_restJson1.ts
+++ b/clients/client-iot-events/src/protocols/Aws_restJson1.ts
@@ -365,12 +365,9 @@ export const se_DescribeLoggingOptionsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/logging");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-iot-wireless/src/protocols/Aws_restJson1.ts b/clients/client-iot-wireless/src/protocols/Aws_restJson1.ts
index ae21bcc00707..50c525710845 100644
--- a/clients/client-iot-wireless/src/protocols/Aws_restJson1.ts
+++ b/clients/client-iot-wireless/src/protocols/Aws_restJson1.ts
@@ -1333,12 +1333,9 @@ export const se_GetEventConfigurationByResourceTypesCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/event-configurations-resource-types");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1367,12 +1364,9 @@ export const se_GetLogLevelsByResourceTypesCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/log-levels");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1385,12 +1379,9 @@ export const se_GetMetricConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/metric-configuration");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -2188,12 +2179,9 @@ export const se_ResetAllResourceLogLevelsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/log-levels");
   let body: any;
-  body = "";
   b.m("DELETE").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-iot/src/protocols/Aws_restJson1.ts b/clients/client-iot/src/protocols/Aws_restJson1.ts
index 67ad12647433..4c1a314723f3 100644
--- a/clients/client-iot/src/protocols/Aws_restJson1.ts
+++ b/clients/client-iot/src/protocols/Aws_restJson1.ts
@@ -1245,12 +1245,9 @@ export const se_ClearDefaultAuthorizerCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/default-authorizer");
   let body: any;
-  body = "";
   b.m("DELETE").h(headers).b(body);
   return b.build();
 };
@@ -2517,12 +2514,9 @@ export const se_DeleteRegistrationCodeCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/registrationcode");
   let body: any;
-  body = "";
   b.m("DELETE").h(headers).b(body);
   return b.build();
 };
@@ -2730,12 +2724,9 @@ export const se_DescribeAccountAuditConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/audit/configuration");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -2915,12 +2906,9 @@ export const se_DescribeDefaultAuthorizerCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/default-authorizer");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -2999,12 +2987,9 @@ export const se_DescribeEventConfigurationsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/event-configurations");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -3504,12 +3489,9 @@ export const se_GetIndexingConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/indexing/config");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -3538,12 +3520,9 @@ export const se_GetLoggingOptionsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/loggingOptions");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -3588,12 +3567,9 @@ export const se_GetPackageConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/package-configuration");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -3682,12 +3658,9 @@ export const se_GetRegistrationCodeCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/registrationcode");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -3757,12 +3730,9 @@ export const se_GetV2LoggingOptionsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/v2LoggingOptions");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-iotanalytics/src/protocols/Aws_restJson1.ts b/clients/client-iotanalytics/src/protocols/Aws_restJson1.ts
index 646bf888fce5..1cc398a22383 100644
--- a/clients/client-iotanalytics/src/protocols/Aws_restJson1.ts
+++ b/clients/client-iotanalytics/src/protocols/Aws_restJson1.ts
@@ -480,12 +480,9 @@ export const se_DescribeLoggingOptionsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/logging");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-iotsitewise/src/protocols/Aws_restJson1.ts b/clients/client-iotsitewise/src/protocols/Aws_restJson1.ts
index b5265d35197e..bc96029fe7c2 100644
--- a/clients/client-iotsitewise/src/protocols/Aws_restJson1.ts
+++ b/clients/client-iotsitewise/src/protocols/Aws_restJson1.ts
@@ -1382,12 +1382,9 @@ export const se_DescribeDefaultEncryptionConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/configuration/account/encryption");
   let body: any;
-  body = "";
   let { hostname: resolvedHostname } = await context.endpoint();
   if (context.disableHostPrefix !== true) {
     resolvedHostname = "api." + resolvedHostname;
@@ -1457,12 +1454,9 @@ export const se_DescribeLoggingOptionsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/logging");
   let body: any;
-  body = "";
   let { hostname: resolvedHostname } = await context.endpoint();
   if (context.disableHostPrefix !== true) {
     resolvedHostname = "api." + resolvedHostname;
@@ -1531,12 +1525,9 @@ export const se_DescribeStorageConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/configuration/account/storage");
   let body: any;
-  body = "";
   let { hostname: resolvedHostname } = await context.endpoint();
   if (context.disableHostPrefix !== true) {
     resolvedHostname = "api." + resolvedHostname;
diff --git a/clients/client-iottwinmaker/src/protocols/Aws_restJson1.ts b/clients/client-iottwinmaker/src/protocols/Aws_restJson1.ts
index 77c00e11fa2c..f47722ccf5a3 100644
--- a/clients/client-iottwinmaker/src/protocols/Aws_restJson1.ts
+++ b/clients/client-iottwinmaker/src/protocols/Aws_restJson1.ts
@@ -686,12 +686,9 @@ export const se_GetPricingPlanCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/pricingplan");
   let body: any;
-  body = "";
   let { hostname: resolvedHostname } = await context.endpoint();
   if (context.disableHostPrefix !== true) {
     resolvedHostname = "api." + resolvedHostname;
diff --git a/clients/client-lakeformation/src/protocols/Aws_restJson1.ts b/clients/client-lakeformation/src/protocols/Aws_restJson1.ts
index 337fe70014d3..693aa98cfce3 100644
--- a/clients/client-lakeformation/src/protocols/Aws_restJson1.ts
+++ b/clients/client-lakeformation/src/protocols/Aws_restJson1.ts
@@ -721,12 +721,9 @@ export const se_GetDataLakePrincipalCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/GetDataLakePrincipal");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-lambda/src/protocols/Aws_restJson1.ts b/clients/client-lambda/src/protocols/Aws_restJson1.ts
index 2d165ba86355..4d9d62c836ef 100644
--- a/clients/client-lambda/src/protocols/Aws_restJson1.ts
+++ b/clients/client-lambda/src/protocols/Aws_restJson1.ts
@@ -712,12 +712,9 @@ export const se_GetAccountSettingsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/2016-08-19/account-settings");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-lex-models-v2/src/protocols/Aws_restJson1.ts b/clients/client-lex-models-v2/src/protocols/Aws_restJson1.ts
index 700b01c431c2..95b476312ba1 100644
--- a/clients/client-lex-models-v2/src/protocols/Aws_restJson1.ts
+++ b/clients/client-lex-models-v2/src/protocols/Aws_restJson1.ts
@@ -904,12 +904,9 @@ export const se_CreateUploadUrlCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/createuploadurl");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-lex-runtime-v2/src/protocols/Aws_restJson1.ts b/clients/client-lex-runtime-v2/src/protocols/Aws_restJson1.ts
index be11a1449cc2..18db24c80674 100644
--- a/clients/client-lex-runtime-v2/src/protocols/Aws_restJson1.ts
+++ b/clients/client-lex-runtime-v2/src/protocols/Aws_restJson1.ts
@@ -207,6 +207,7 @@ export const se_StartConversationCommand = async (
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
   const headers: any = map({}, isSerializableHeaderValue, {
+    "content-type": "application/json",
     [_xalcm]: input[_cM]!,
   });
   b.bp("/bots/{botId}/botAliases/{botAliasId}/botLocales/{localeId}/sessions/{sessionId}/conversation");
diff --git a/clients/client-license-manager-linux-subscriptions/src/protocols/Aws_restJson1.ts b/clients/client-license-manager-linux-subscriptions/src/protocols/Aws_restJson1.ts
index 759c056278d9..7c2c402d9272 100644
--- a/clients/client-license-manager-linux-subscriptions/src/protocols/Aws_restJson1.ts
+++ b/clients/client-license-manager-linux-subscriptions/src/protocols/Aws_restJson1.ts
@@ -49,12 +49,9 @@ export const se_GetServiceSettingsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/subscription/GetServiceSettings");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-m2/src/protocols/Aws_restJson1.ts b/clients/client-m2/src/protocols/Aws_restJson1.ts
index 27253b69ccf6..83a2db28d235 100644
--- a/clients/client-m2/src/protocols/Aws_restJson1.ts
+++ b/clients/client-m2/src/protocols/Aws_restJson1.ts
@@ -456,12 +456,9 @@ export const se_GetSignedBluinsightsUrlCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/signed-bi-url");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-macie2/src/protocols/Aws_restJson1.ts b/clients/client-macie2/src/protocols/Aws_restJson1.ts
index 150100249de9..2934489f8563 100644
--- a/clients/client-macie2/src/protocols/Aws_restJson1.ts
+++ b/clients/client-macie2/src/protocols/Aws_restJson1.ts
@@ -833,12 +833,9 @@ export const se_DescribeOrganizationConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/admin/configuration");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -851,12 +848,9 @@ export const se_DisableMacieCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/macie");
   let body: any;
-  body = "";
   b.m("DELETE").h(headers).b(body);
   return b.build();
 };
@@ -887,12 +881,9 @@ export const se_DisassociateFromAdministratorAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/administrator/disassociate");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -905,12 +896,9 @@ export const se_DisassociateFromMasterAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/master/disassociate");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -986,12 +974,9 @@ export const se_GetAdministratorAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/administrator");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1020,12 +1005,9 @@ export const se_GetAutomatedDiscoveryConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/automated-discovery/configuration");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1060,12 +1042,9 @@ export const se_GetClassificationExportConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/classification-export-configuration");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1149,12 +1128,9 @@ export const se_GetFindingsPublicationConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/findings-publication-configuration");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1192,12 +1168,9 @@ export const se_GetInvitationsCountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/invitations/count");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1210,12 +1183,9 @@ export const se_GetMacieSessionCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/macie");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1228,12 +1198,9 @@ export const se_GetMasterAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/master");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1280,12 +1247,9 @@ export const se_GetRevealConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/reveal-configuration");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-mediaconvert/src/protocols/Aws_restJson1.ts b/clients/client-mediaconvert/src/protocols/Aws_restJson1.ts
index 11dec5924990..cd93ac2b3f43 100644
--- a/clients/client-mediaconvert/src/protocols/Aws_restJson1.ts
+++ b/clients/client-mediaconvert/src/protocols/Aws_restJson1.ts
@@ -438,12 +438,9 @@ export const se_DeletePolicyCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/2017-08-29/policy");
   let body: any;
-  body = "";
   b.m("DELETE").h(headers).b(body);
   return b.build();
 };
@@ -557,12 +554,9 @@ export const se_GetPolicyCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/2017-08-29/policy");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-medialive/src/protocols/Aws_restJson1.ts b/clients/client-medialive/src/protocols/Aws_restJson1.ts
index 3280eb52f05b..7cc5bd82a36b 100644
--- a/clients/client-medialive/src/protocols/Aws_restJson1.ts
+++ b/clients/client-medialive/src/protocols/Aws_restJson1.ts
@@ -1244,12 +1244,9 @@ export const se_DescribeAccountConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/prod/accountConfiguration");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-mgn/src/protocols/Aws_restJson1.ts b/clients/client-mgn/src/protocols/Aws_restJson1.ts
index 1f97c2d4fdfc..7021d3e5fbdb 100644
--- a/clients/client-mgn/src/protocols/Aws_restJson1.ts
+++ b/clients/client-mgn/src/protocols/Aws_restJson1.ts
@@ -966,12 +966,9 @@ export const se_InitializeServiceCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/InitializeService");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-migrationhubstrategy/src/protocols/Aws_restJson1.ts b/clients/client-migrationhubstrategy/src/protocols/Aws_restJson1.ts
index 342fb7074c25..8ce38b1b743a 100644
--- a/clients/client-migrationhubstrategy/src/protocols/Aws_restJson1.ts
+++ b/clients/client-migrationhubstrategy/src/protocols/Aws_restJson1.ts
@@ -199,12 +199,9 @@ export const se_GetLatestAssessmentIdCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/get-latest-assessment-id");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -217,12 +214,9 @@ export const se_GetPortfolioPreferencesCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/get-portfolio-preferences");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -235,12 +229,9 @@ export const se_GetPortfolioSummaryCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/get-portfolio-summary");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-neptunedata/src/protocols/Aws_restJson1.ts b/clients/client-neptunedata/src/protocols/Aws_restJson1.ts
index 022f75fc3a1a..786417af2542 100644
--- a/clients/client-neptunedata/src/protocols/Aws_restJson1.ts
+++ b/clients/client-neptunedata/src/protocols/Aws_restJson1.ts
@@ -374,12 +374,9 @@ export const se_DeletePropertygraphStatisticsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/propertygraph/statistics");
   let body: any;
-  body = "";
   b.m("DELETE").h(headers).b(body);
   return b.build();
 };
@@ -392,12 +389,9 @@ export const se_DeleteSparqlStatisticsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/sparql/statistics");
   let body: any;
-  body = "";
   b.m("DELETE").h(headers).b(body);
   return b.build();
 };
@@ -551,12 +545,9 @@ export const se_GetEngineStatusCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/status");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -699,12 +690,9 @@ export const se_GetPropertygraphStatisticsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/propertygraph/statistics");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -776,12 +764,9 @@ export const se_GetSparqlStatisticsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/sparql/statistics");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-osis/src/protocols/Aws_restJson1.ts b/clients/client-osis/src/protocols/Aws_restJson1.ts
index 5e775ae8c6ab..5dcf1958d8c3 100644
--- a/clients/client-osis/src/protocols/Aws_restJson1.ts
+++ b/clients/client-osis/src/protocols/Aws_restJson1.ts
@@ -180,12 +180,9 @@ export const se_ListPipelineBlueprintsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/2022-01-01/osis/listPipelineBlueprints");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-pinpoint-email/src/protocols/Aws_restJson1.ts b/clients/client-pinpoint-email/src/protocols/Aws_restJson1.ts
index 33be7fafc9fe..dd4e3d46337e 100644
--- a/clients/client-pinpoint-email/src/protocols/Aws_restJson1.ts
+++ b/clients/client-pinpoint-email/src/protocols/Aws_restJson1.ts
@@ -414,12 +414,9 @@ export const se_GetAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/v1/email/account");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -521,12 +518,9 @@ export const se_GetDeliverabilityDashboardOptionsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/v1/email/deliverability-dashboard");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-privatenetworks/src/protocols/Aws_restJson1.ts b/clients/client-privatenetworks/src/protocols/Aws_restJson1.ts
index bb9a0cdaaaae..12805a85ec8e 100644
--- a/clients/client-privatenetworks/src/protocols/Aws_restJson1.ts
+++ b/clients/client-privatenetworks/src/protocols/Aws_restJson1.ts
@@ -548,12 +548,9 @@ export const se_ListTagsForResourceCommand = async (
  */
 export const se_PingCommand = async (input: PingCommandInput, context: __SerdeContext): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/ping");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-qbusiness/src/protocols/Aws_restJson1.ts b/clients/client-qbusiness/src/protocols/Aws_restJson1.ts
index ac7580960c43..3d43d6fcadb2 100644
--- a/clients/client-qbusiness/src/protocols/Aws_restJson1.ts
+++ b/clients/client-qbusiness/src/protocols/Aws_restJson1.ts
@@ -285,7 +285,9 @@ export const se_ChatCommand = async (
   context: __SerdeContext & __EventStreamSerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {};
+  const headers: any = {
+    "content-type": "application/json",
+  };
   b.bp("/applications/{applicationId}/conversations");
   b.p("applicationId", () => input.applicationId!, "{applicationId}", false);
   const query: any = map({
diff --git a/clients/client-ram/src/protocols/Aws_restJson1.ts b/clients/client-ram/src/protocols/Aws_restJson1.ts
index b4c2794e65bb..576aaa38c4ca 100644
--- a/clients/client-ram/src/protocols/Aws_restJson1.ts
+++ b/clients/client-ram/src/protocols/Aws_restJson1.ts
@@ -442,12 +442,9 @@ export const se_EnableSharingWithAwsOrganizationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/enablesharingwithawsorganization");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-rekognitionstreaming/src/protocols/Aws_restJson1.ts b/clients/client-rekognitionstreaming/src/protocols/Aws_restJson1.ts
index 4ee328d6c196..645b63a94548 100644
--- a/clients/client-rekognitionstreaming/src/protocols/Aws_restJson1.ts
+++ b/clients/client-rekognitionstreaming/src/protocols/Aws_restJson1.ts
@@ -71,6 +71,7 @@ export const se_StartFaceLivenessSessionCommand = async (
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
   const headers: any = map({}, isSerializableHeaderValue, {
+    "content-type": "application/json",
     [_xarslsi]: input[_SI]!,
     [_xarslvw]: input[_VW]!,
     [_xarslvh]: input[_VH]!,
diff --git a/clients/client-resource-explorer-2/src/protocols/Aws_restJson1.ts b/clients/client-resource-explorer-2/src/protocols/Aws_restJson1.ts
index 985a2136cd07..dbbda5bc463c 100644
--- a/clients/client-resource-explorer-2/src/protocols/Aws_restJson1.ts
+++ b/clients/client-resource-explorer-2/src/protocols/Aws_restJson1.ts
@@ -226,12 +226,9 @@ export const se_DisassociateDefaultViewCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/DisassociateDefaultView");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -244,12 +241,9 @@ export const se_GetAccountLevelServiceConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/GetAccountLevelServiceConfiguration");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -262,12 +256,9 @@ export const se_GetDefaultViewCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/GetDefaultView");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -280,12 +271,9 @@ export const se_GetIndexCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/GetIndex");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-resource-groups/src/protocols/Aws_restJson1.ts b/clients/client-resource-groups/src/protocols/Aws_restJson1.ts
index 26ac7a82cd30..ca10d2add77d 100644
--- a/clients/client-resource-groups/src/protocols/Aws_restJson1.ts
+++ b/clients/client-resource-groups/src/protocols/Aws_restJson1.ts
@@ -121,12 +121,9 @@ export const se_GetAccountSettingsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/get-account-settings");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-route-53/src/protocols/Aws_restXml.ts b/clients/client-route-53/src/protocols/Aws_restXml.ts
index 8214031eabd7..f397bdd84426 100644
--- a/clients/client-route-53/src/protocols/Aws_restXml.ts
+++ b/clients/client-route-53/src/protocols/Aws_restXml.ts
@@ -1047,12 +1047,9 @@ export const se_GetCheckerIpRangesCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/xml",
-  };
+  const headers: any = {};
   b.bp("/2013-04-01/checkeripranges");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1117,12 +1114,9 @@ export const se_GetHealthCheckCountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/xml",
-  };
+  const headers: any = {};
   b.bp("/2013-04-01/healthcheckcount");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1183,12 +1177,9 @@ export const se_GetHostedZoneCountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/xml",
-  };
+  const headers: any = {};
   b.bp("/2013-04-01/hostedzonecount");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1300,12 +1291,9 @@ export const se_GetTrafficPolicyInstanceCountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/xml",
-  };
+  const headers: any = {};
   b.bp("/2013-04-01/trafficpolicyinstancecount");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-s3/src/protocols/Aws_restXml.ts b/clients/client-s3/src/protocols/Aws_restXml.ts
index 1299ff6e0364..7ceba3bab08a 100644
--- a/clients/client-s3/src/protocols/Aws_restXml.ts
+++ b/clients/client-s3/src/protocols/Aws_restXml.ts
@@ -1864,15 +1864,12 @@ export const se_ListBucketsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/xml",
-  };
+  const headers: any = {};
   b.bp("/");
   const query: any = map({
     [_xi]: [, "ListBuckets"],
   });
   let body: any;
-  body = "";
   b.m("GET").h(headers).q(query).b(body);
   return b.build();
 };
diff --git a/clients/client-securityhub/src/protocols/Aws_restJson1.ts b/clients/client-securityhub/src/protocols/Aws_restJson1.ts
index 3f8bd93fb29a..c54013292bd7 100644
--- a/clients/client-securityhub/src/protocols/Aws_restJson1.ts
+++ b/clients/client-securityhub/src/protocols/Aws_restJson1.ts
@@ -1550,12 +1550,9 @@ export const se_DescribeOrganizationConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/organization/configuration");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1665,12 +1662,9 @@ export const se_DisableSecurityHubCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/accounts");
   let body: any;
-  body = "";
   b.m("DELETE").h(headers).b(body);
   return b.build();
 };
@@ -1683,12 +1677,9 @@ export const se_DisassociateFromAdministratorAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/administrator/disassociate");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -1701,12 +1692,9 @@ export const se_DisassociateFromMasterAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/master/disassociate");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -1809,12 +1797,9 @@ export const se_GetAdministratorAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/administrator");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1996,12 +1981,9 @@ export const se_GetInvitationsCountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/invitations/count");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -2014,12 +1996,9 @@ export const se_GetMasterAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/master");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-securitylake/src/protocols/Aws_restJson1.ts b/clients/client-securitylake/src/protocols/Aws_restJson1.ts
index f6bae9304d5d..4149a9dab8af 100644
--- a/clients/client-securitylake/src/protocols/Aws_restJson1.ts
+++ b/clients/client-securitylake/src/protocols/Aws_restJson1.ts
@@ -374,12 +374,9 @@ export const se_DeleteDataLakeExceptionSubscriptionCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/v1/datalake/exceptions/subscription");
   let body: any;
-  body = "";
   b.m("DELETE").h(headers).b(body);
   return b.build();
 };
@@ -446,12 +443,9 @@ export const se_DeregisterDataLakeDelegatedAdministratorCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/v1/datalake/delegate");
   let body: any;
-  body = "";
   b.m("DELETE").h(headers).b(body);
   return b.build();
 };
@@ -464,12 +458,9 @@ export const se_GetDataLakeExceptionSubscriptionCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/v1/datalake/exceptions/subscription");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -482,12 +473,9 @@ export const se_GetDataLakeOrganizationConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/v1/datalake/organization/configuration");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-service-catalog-appregistry/src/protocols/Aws_restJson1.ts b/clients/client-service-catalog-appregistry/src/protocols/Aws_restJson1.ts
index 89983598ff7f..d9ff342afdad 100644
--- a/clients/client-service-catalog-appregistry/src/protocols/Aws_restJson1.ts
+++ b/clients/client-service-catalog-appregistry/src/protocols/Aws_restJson1.ts
@@ -325,12 +325,9 @@ export const se_GetConfigurationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/configuration");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-sesv2/src/protocols/Aws_restJson1.ts b/clients/client-sesv2/src/protocols/Aws_restJson1.ts
index f359e08779db..698ba465330a 100644
--- a/clients/client-sesv2/src/protocols/Aws_restJson1.ts
+++ b/clients/client-sesv2/src/protocols/Aws_restJson1.ts
@@ -907,12 +907,9 @@ export const se_GetAccountCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/v2/email/account");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1079,12 +1076,9 @@ export const se_GetDeliverabilityDashboardOptionsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/v2/email/deliverability-dashboard");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-support-app/src/protocols/Aws_restJson1.ts b/clients/client-support-app/src/protocols/Aws_restJson1.ts
index bac05083bc78..d90c706ce6cd 100644
--- a/clients/client-support-app/src/protocols/Aws_restJson1.ts
+++ b/clients/client-support-app/src/protocols/Aws_restJson1.ts
@@ -98,12 +98,9 @@ export const se_DeleteAccountAliasCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/control/delete-account-alias");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -161,12 +158,9 @@ export const se_GetAccountAliasCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/control/get-account-alias");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-transcribe-streaming/src/protocols/Aws_restJson1.ts b/clients/client-transcribe-streaming/src/protocols/Aws_restJson1.ts
index 7f37a7670684..03cb376627d7 100644
--- a/clients/client-transcribe-streaming/src/protocols/Aws_restJson1.ts
+++ b/clients/client-transcribe-streaming/src/protocols/Aws_restJson1.ts
@@ -80,6 +80,7 @@ export const se_StartCallAnalyticsStreamTranscriptionCommand = async (
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
   const headers: any = map({}, isSerializableHeaderValue, {
+    "content-type": "application/json",
     [_xatlc]: input[_LC]!,
     [_xatsr]: [() => isSerializableHeaderValue(input[_MSRH]), () => input[_MSRH]!.toString()],
     [_xatme]: input[_ME]!,
@@ -112,6 +113,7 @@ export const se_StartMedicalStreamTranscriptionCommand = async (
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
   const headers: any = map({}, isSerializableHeaderValue, {
+    "content-type": "application/json",
     [_xatlc]: input[_LC]!,
     [_xatsr]: [() => isSerializableHeaderValue(input[_MSRH]), () => input[_MSRH]!.toString()],
     [_xatme]: input[_ME]!,
@@ -142,6 +144,7 @@ export const se_StartStreamTranscriptionCommand = async (
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
   const headers: any = map({}, isSerializableHeaderValue, {
+    "content-type": "application/json",
     [_xatlc]: input[_LC]!,
     [_xatsr]: [() => isSerializableHeaderValue(input[_MSRH]), () => input[_MSRH]!.toString()],
     [_xatme]: input[_ME]!,
diff --git a/clients/client-wellarchitected/src/protocols/Aws_restJson1.ts b/clients/client-wellarchitected/src/protocols/Aws_restJson1.ts
index bb82919ccb13..bf5d6426500c 100644
--- a/clients/client-wellarchitected/src/protocols/Aws_restJson1.ts
+++ b/clients/client-wellarchitected/src/protocols/Aws_restJson1.ts
@@ -773,12 +773,9 @@ export const se_GetGlobalSettingsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/global-settings");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -906,12 +903,9 @@ export const se_GetProfileTemplateCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/profileTemplate");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
diff --git a/clients/client-xray/src/protocols/Aws_restJson1.ts b/clients/client-xray/src/protocols/Aws_restJson1.ts
index ac1647478a88..342259f4edeb 100644
--- a/clients/client-xray/src/protocols/Aws_restJson1.ts
+++ b/clients/client-xray/src/protocols/Aws_restJson1.ts
@@ -282,12 +282,9 @@ export const se_GetEncryptionConfigCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/EncryptionConfig");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/private/aws-protocoltests-restjson/src/protocols/Aws_restJson1.ts b/private/aws-protocoltests-restjson/src/protocols/Aws_restJson1.ts
index df2fea4dd88b..6856fa584b9e 100644
--- a/private/aws-protocoltests-restjson/src/protocols/Aws_restJson1.ts
+++ b/private/aws-protocoltests-restjson/src/protocols/Aws_restJson1.ts
@@ -445,12 +445,9 @@ export const se_DatetimeOffsetsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/DatetimeOffsets");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -533,12 +530,9 @@ export const se_EmptyInputAndEmptyOutputCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/EmptyInputAndEmptyOutput");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -551,12 +545,9 @@ export const se_EndpointOperationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/EndpointOperation");
   let body: any;
-  body = "";
   let { hostname: resolvedHostname } = await context.endpoint();
   if (context.disableHostPrefix !== true) {
     resolvedHostname = "foo." + resolvedHostname;
@@ -611,12 +602,9 @@ export const se_FractionalSecondsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/FractionalSeconds");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -629,12 +617,9 @@ export const se_GreetingWithErrorsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/GreetingWithErrors");
   let body: any;
-  body = "";
   b.m("PUT").h(headers).b(body);
   return b.build();
 };
@@ -647,12 +632,9 @@ export const se_HostWithPathOperationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/HostWithPathOperation");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -819,12 +801,9 @@ export const se_HttpPrefixHeadersInResponseCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/HttpPrefixHeadersResponse");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -944,12 +923,9 @@ export const se_HttpResponseCodeCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/HttpResponseCode");
   let body: any;
-  body = "";
   b.m("PUT").h(headers).b(body);
   return b.build();
 };
@@ -982,12 +958,9 @@ export const se_IgnoreQueryParamsInResponseCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/IgnoreQueryParamsInResponse");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1243,12 +1216,9 @@ export const se_MalformedAcceptWithBodyCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/MalformedAcceptWithBody");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -1261,12 +1231,9 @@ export const se_MalformedAcceptWithGenericStringCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/MalformedAcceptWithGenericString");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -1279,12 +1246,9 @@ export const se_MalformedAcceptWithPayloadCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/MalformedAcceptWithPayload");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -1415,12 +1379,9 @@ export const se_MalformedContentTypeWithoutBodyCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/MalformedContentTypeWithoutBody");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -1958,12 +1919,9 @@ export const se_NoInputAndNoOutputCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/NoInputAndNoOutput");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -1976,12 +1934,9 @@ export const se_NoInputAndOutputCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/NoInputAndOutputOutput");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -2491,12 +2446,9 @@ export const se_UnitInputAndOutputCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/json",
-  };
+  const headers: any = {};
   b.bp("/UnitInputAndOutput");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/private/aws-protocoltests-restxml/src/protocols/Aws_restXml.ts b/private/aws-protocoltests-restxml/src/protocols/Aws_restXml.ts
index 1bb2b6f101a3..e8cd612ece48 100644
--- a/private/aws-protocoltests-restxml/src/protocols/Aws_restXml.ts
+++ b/private/aws-protocoltests-restxml/src/protocols/Aws_restXml.ts
@@ -351,12 +351,9 @@ export const se_DatetimeOffsetsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/xml",
-  };
+  const headers: any = {};
   b.bp("/DatetimeOffsets");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -369,12 +366,9 @@ export const se_EmptyInputAndEmptyOutputCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/xml",
-  };
+  const headers: any = {};
   b.bp("/EmptyInputAndEmptyOutput");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -387,12 +381,9 @@ export const se_EndpointOperationCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/xml",
-  };
+  const headers: any = {};
   b.bp("/EndpointOperation");
   let body: any;
-  body = "";
   let { hostname: resolvedHostname } = await context.endpoint();
   if (context.disableHostPrefix !== true) {
     resolvedHostname = "foo." + resolvedHostname;
@@ -519,12 +510,9 @@ export const se_FlattenedXmlMapWithXmlNamespaceCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/xml",
-  };
+  const headers: any = {};
   b.bp("/FlattenedXmlMapWithXmlNamespace");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -537,12 +525,9 @@ export const se_FractionalSecondsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/xml",
-  };
+  const headers: any = {};
   b.bp("/FractionalSeconds");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -555,12 +540,9 @@ export const se_GreetingWithErrorsCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/xml",
-  };
+  const headers: any = {};
   b.bp("/GreetingWithErrors");
   let body: any;
-  body = "";
   b.m("PUT").h(headers).b(body);
   return b.build();
 };
@@ -895,12 +877,9 @@ export const se_HttpResponseCodeCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/xml",
-  };
+  const headers: any = {};
   b.bp("/HttpResponseCode");
   let body: any;
-  body = "";
   b.m("PUT").h(headers).b(body);
   return b.build();
 };
@@ -935,12 +914,9 @@ export const se_IgnoreQueryParamsInResponseCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/xml",
-  };
+  const headers: any = {};
   b.bp("/IgnoreQueryParamsInResponse");
   let body: any;
-  body = "";
   b.m("GET").h(headers).b(body);
   return b.build();
 };
@@ -1031,12 +1007,9 @@ export const se_NoInputAndNoOutputCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/xml",
-  };
+  const headers: any = {};
   b.bp("/NoInputAndNoOutput");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
@@ -1049,12 +1022,9 @@ export const se_NoInputAndOutputCommand = async (
   context: __SerdeContext
 ): Promise<__HttpRequest> => {
   const b = rb(input, context);
-  const headers: any = {
-    "content-type": "application/xml",
-  };
+  const headers: any = {};
   b.bp("/NoInputAndOutputOutput");
   let body: any;
-  body = "";
   b.m("POST").h(headers).b(body);
   return b.build();
 };
diff --git a/scripts/generate-clients/config.js b/scripts/generate-clients/config.js
index 91b1a1797637..0edb634097a9 100644
--- a/scripts/generate-clients/config.js
+++ b/scripts/generate-clients/config.js
@@ -1,7 +1,7 @@
 // Update this commit when taking up new changes from smithy-typescript.
 module.exports = {
   // Use full commit hash as we explicitly fetch it.
-  SMITHY_TS_COMMIT: "d777776c17ee2b6cc212f8f9f8d6eea13eaba026",
+  SMITHY_TS_COMMIT: "dddbe3c972dcc794a0fd5fe98d4238f61777a4a9",
 };
 
 if (module.exports.SMITHY_TS_COMMIT.length < 40) {