diff --git a/clients/google-api-services-gmail/v1/2.0.0/README.md b/clients/google-api-services-gmail/v1/2.0.0/README.md
index 3c32d8f7bed..99515992c32 100644
--- a/clients/google-api-services-gmail/v1/2.0.0/README.md
+++ b/clients/google-api-services-gmail/v1/2.0.0/README.md
@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-gmail</artifactId>
-      <version>v1-rev20260525-2.0.0</version>
+      <version>v1-rev20260727-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-gmail:v1-rev20260525-2.0.0'
+  implementation 'com.google.apis:google-api-services-gmail:v1-rev20260727-2.0.0'
 }
 ```
 
diff --git a/clients/google-api-services-gmail/v1/2.0.0/com/google/api/services/gmail/Gmail.java b/clients/google-api-services-gmail/v1/2.0.0/com/google/api/services/gmail/Gmail.java
index 2066fdec04b..c8a148edc8b 100644
--- a/clients/google-api-services-gmail/v1/2.0.0/com/google/api/services/gmail/Gmail.java
+++ b/clients/google-api-services-gmail/v1/2.0.0/com/google/api/services/gmail/Gmail.java
@@ -7645,6 +7645,32 @@ public Create setUserId(java.lang.String userId) {
               return this;
             }
 
+            /**
+             * The type of certificate chain validation to perform at creation. The request will be
+             * rejected if the uploaded chain fails to satisfy the requested validation checks. When
+             * unspecified, this parameter defaults to `all`.
+             */
+            @com.google.api.client.util.Key
+            private java.lang.String chainValidation;
+
+            /** The type of certificate chain validation to perform at creation. The request will be rejected if
+           the uploaded chain fails to satisfy the requested validation checks. When unspecified, this
+           parameter defaults to `all`. [default: all]
+             */
+            public java.lang.String getChainValidation() {
+              return chainValidation;
+            }
+
+            /**
+             * The type of certificate chain validation to perform at creation. The request will be
+             * rejected if the uploaded chain fails to satisfy the requested validation checks. When
+             * unspecified, this parameter defaults to `all`.
+             */
+            public Create setChainValidation(java.lang.String chainValidation) {
+              this.chainValidation = chainValidation;
+              return this;
+            }
+
             @Override
             public Create set(String parameterName, Object value) {
               return (Create) super.set(parameterName, value);
diff --git a/clients/google-api-services-gmail/v1/2.0.0/pom.xml b/clients/google-api-services-gmail/v1/2.0.0/pom.xml
index c41bc70e1e2..429e6dd0681 100644
--- a/clients/google-api-services-gmail/v1/2.0.0/pom.xml
+++ b/clients/google-api-services-gmail/v1/2.0.0/pom.xml
@@ -8,8 +8,8 @@
 
   <groupId>com.google.apis</groupId>
   <artifactId>google-api-services-gmail</artifactId>
-  <version>v1-rev20260525-2.0.0</version>
-  <name>Gmail API v1-rev20260525-2.0.0</name>
+  <version>v1-rev20260727-2.0.0</version>
+  <name>Gmail API v1-rev20260727-2.0.0</name>
   <packaging>jar</packaging>
 
   <inceptionYear>2011</inceptionYear>
diff --git a/clients/google-api-services-gmail/v1/README.md b/clients/google-api-services-gmail/v1/README.md
index 3c32d8f7bed..99515992c32 100644
--- a/clients/google-api-services-gmail/v1/README.md
+++ b/clients/google-api-services-gmail/v1/README.md
@@ -22,7 +22,7 @@ Add the following lines to your `pom.xml` file:
     <dependency>
       <groupId>com.google.apis</groupId>
       <artifactId>google-api-services-gmail</artifactId>
-      <version>v1-rev20260525-2.0.0</version>
+      <version>v1-rev20260727-2.0.0</version>
     </dependency>
   </dependencies>
 </project>
@@ -35,7 +35,7 @@ repositories {
   mavenCentral()
 }
 dependencies {
-  implementation 'com.google.apis:google-api-services-gmail:v1-rev20260525-2.0.0'
+  implementation 'com.google.apis:google-api-services-gmail:v1-rev20260727-2.0.0'
 }
 ```