diff --git a/generated/google-apis-apigateway_v1/CHANGELOG.md b/generated/google-apis-apigateway_v1/CHANGELOG.md
index b2ec6286fc5..dfb615d5aa8 100644
--- a/generated/google-apis-apigateway_v1/CHANGELOG.md
+++ b/generated/google-apis-apigateway_v1/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Release history for google-apis-apigateway_v1
 
+### v0.40.0 (2026-02-08)
+
+* Regenerated from discovery document revision 20260127
+
 ### v0.39.0 (2025-12-21)
 
 * Regenerated from discovery document revision 20251210
diff --git a/generated/google-apis-apigateway_v1/lib/google/apis/apigateway_v1/gem_version.rb b/generated/google-apis-apigateway_v1/lib/google/apis/apigateway_v1/gem_version.rb
index e3be963c444..d06f069d3d0 100644
--- a/generated/google-apis-apigateway_v1/lib/google/apis/apigateway_v1/gem_version.rb
+++ b/generated/google-apis-apigateway_v1/lib/google/apis/apigateway_v1/gem_version.rb
@@ -16,13 +16,13 @@ module Google
   module Apis
     module ApigatewayV1
       # Version of the google-apis-apigateway_v1 gem
-      GEM_VERSION = "0.39.0"
+      GEM_VERSION = "0.40.0"
 
       # Version of the code generator used to generate this client
       GENERATOR_VERSION = "0.18.0"
 
       # Revision of the discovery document this client was generated from
-      REVISION = "20251210"
+      REVISION = "20260127"
     end
   end
 end
diff --git a/generated/google-apis-apigateway_v1/lib/google/apis/apigateway_v1/service.rb b/generated/google-apis-apigateway_v1/lib/google/apis/apigateway_v1/service.rb
index 23031a87c08..d34f2a15e89 100644
--- a/generated/google-apis-apigateway_v1/lib/google/apis/apigateway_v1/service.rb
+++ b/generated/google-apis-apigateway_v1/lib/google/apis/apigateway_v1/service.rb
@@ -81,7 +81,11 @@ def get_project_location(name, fields: nil, quota_user: nil, options: nil, &bloc
           execute_or_queue_command(command, &block)
         end
         
-        # Lists information about the supported locations for this service.
+        # Lists information about the supported locations for this service. This method
+        # can be called in two ways: * **List all public locations:** Use the path `GET /
+        # v1/locations`. * **List project-visible locations:** Use the path `GET /v1/
+        # projects/`project_id`/locations`. This may include public locations as well as
+        # private or other locations specifically visible to the project.
         # @param [String] name
         #   The resource that owns the locations collection, if applicable.
         # @param [Array<String>, String] extra_location_types