diff --git a/src/platform/packages/shared/kbn-connector-specs/src/specs/gmail/gmail.test.ts b/src/platform/packages/shared/kbn-connector-specs/src/specs/gmail/gmail.test.ts
index 689bab1ec82a7..7ec0211381248 100644
--- a/src/platform/packages/shared/kbn-connector-specs/src/specs/gmail/gmail.test.ts
+++ b/src/platform/packages/shared/kbn-connector-specs/src/specs/gmail/gmail.test.ts
@@ -34,6 +34,27 @@ describe('GmailConnector', () => {
     });
   });
 
+  describe('auth', () => {
+    it('supports bearer auth', () => {
+      expect(GmailConnector.auth?.types).toContain('bearer');
+    });
+
+    it('supports oauth_authorization_code with correct Google defaults', () => {
+      const oauthType = GmailConnector.auth?.types.find(
+        (t) => typeof t === 'object' && t.type === 'oauth_authorization_code'
+      );
+      expect(oauthType).toBeDefined();
+      expect(oauthType).toMatchObject({
+        type: 'oauth_authorization_code',
+        defaults: {
+          authorizationUrl: 'https://accounts.google.com/o/oauth2/v2/auth',
+          tokenUrl: 'https://oauth2.googleapis.com/token',
+          scope: 'https://www.googleapis.com/auth/gmail.readonly',
+        },
+      });
+    });
+  });
+
   describe('actions', () => {
     it('exposes searchMessages, getMessage, getAttachment, listMessages actions', () => {
       expect(GmailConnector.actions.searchMessages).toBeDefined();
diff --git a/src/platform/packages/shared/kbn-connector-specs/src/specs/gmail/gmail.ts b/src/platform/packages/shared/kbn-connector-specs/src/specs/gmail/gmail.ts
index 2803e9b7651ef..0f03457c84c49 100644
--- a/src/platform/packages/shared/kbn-connector-specs/src/specs/gmail/gmail.ts
+++ b/src/platform/packages/shared/kbn-connector-specs/src/specs/gmail/gmail.ts
@@ -39,7 +39,17 @@ export const GmailConnector: ConnectorSpec = {
     supportedFeatureIds: ['workflows', 'agentBuilder'],
   },
   auth: {
-    types: ['bearer'],
+    types: [
+      'bearer',
+      {
+        type: 'oauth_authorization_code',
+        defaults: {
+          authorizationUrl: 'https://accounts.google.com/o/oauth2/v2/auth',
+          tokenUrl: 'https://oauth2.googleapis.com/token',
+          scope: 'https://www.googleapis.com/auth/gmail.readonly',
+        },
+      },
+    ],
     headers: {
       Accept: 'application/json',
     },
diff --git a/src/platform/packages/shared/kbn-connector-specs/src/specs/google_calendar/google_calendar.test.ts b/src/platform/packages/shared/kbn-connector-specs/src/specs/google_calendar/google_calendar.test.ts
index 7fe7ccaaee7b2..3ba93079351e5 100644
--- a/src/platform/packages/shared/kbn-connector-specs/src/specs/google_calendar/google_calendar.test.ts
+++ b/src/platform/packages/shared/kbn-connector-specs/src/specs/google_calendar/google_calendar.test.ts
@@ -35,10 +35,25 @@ describe('GoogleCalendar', () => {
     expect(GoogleCalendar.metadata.supportedFeatureIds).toContain('workflows');
   });
 
-  it('should use bearer auth', () => {
+  it('should support bearer auth', () => {
     expect(GoogleCalendar.auth?.types).toContain('bearer');
   });
 
+  it('should support oauth_authorization_code with correct Google defaults', () => {
+    const oauthType = GoogleCalendar.auth?.types.find(
+      (t) => typeof t === 'object' && t.type === 'oauth_authorization_code'
+    );
+    expect(oauthType).toBeDefined();
+    expect(oauthType).toMatchObject({
+      type: 'oauth_authorization_code',
+      defaults: {
+        authorizationUrl: 'https://accounts.google.com/o/oauth2/v2/auth',
+        tokenUrl: 'https://oauth2.googleapis.com/token',
+        scope: 'https://www.googleapis.com/auth/calendar.readonly',
+      },
+    });
+  });
+
   it('should define all five actions as tools', () => {
     expect(GoogleCalendar.actions.searchEvents.isTool).toBe(true);
     expect(GoogleCalendar.actions.getEvent.isTool).toBe(true);
diff --git a/src/platform/packages/shared/kbn-connector-specs/src/specs/google_calendar/google_calendar.ts b/src/platform/packages/shared/kbn-connector-specs/src/specs/google_calendar/google_calendar.ts
index 338b72ee4e7be..fff2b1558c2bf 100644
--- a/src/platform/packages/shared/kbn-connector-specs/src/specs/google_calendar/google_calendar.ts
+++ b/src/platform/packages/shared/kbn-connector-specs/src/specs/google_calendar/google_calendar.ts
@@ -55,7 +55,17 @@ export const GoogleCalendar: ConnectorSpec = {
     supportedFeatureIds: ['workflows', 'agentBuilder'],
   },
   auth: {
-    types: ['bearer'],
+    types: [
+      'bearer',
+      {
+        type: 'oauth_authorization_code',
+        defaults: {
+          authorizationUrl: 'https://accounts.google.com/o/oauth2/v2/auth',
+          tokenUrl: 'https://oauth2.googleapis.com/token',
+          scope: 'https://www.googleapis.com/auth/calendar.readonly',
+        },
+      },
+    ],
     headers: {
       Accept: 'application/json',
     },
diff --git a/src/platform/packages/shared/kbn-connector-specs/src/specs/google_drive/google_drive.test.ts b/src/platform/packages/shared/kbn-connector-specs/src/specs/google_drive/google_drive.test.ts
index a09abe1f25cbd..7562ab7d63b36 100644
--- a/src/platform/packages/shared/kbn-connector-specs/src/specs/google_drive/google_drive.test.ts
+++ b/src/platform/packages/shared/kbn-connector-specs/src/specs/google_drive/google_drive.test.ts
@@ -25,6 +25,28 @@ describe('GoogleDriveConnector', () => {
     jest.clearAllMocks();
   });
 
+  describe('auth', () => {
+    it('supports bearer auth', () => {
+      expect(GoogleDriveConnector.auth?.types).toContain('bearer');
+    });
+
+    it('supports oauth_authorization_code with correct Google defaults', () => {
+      const oauthType = GoogleDriveConnector.auth?.types.find(
+        (t) => typeof t === 'object' && t.type === 'oauth_authorization_code'
+      );
+      expect(oauthType).toBeDefined();
+      expect(oauthType).toMatchObject({
+        type: 'oauth_authorization_code',
+        defaults: {
+          authorizationUrl: 'https://accounts.google.com/o/oauth2/v2/auth',
+          tokenUrl: 'https://oauth2.googleapis.com/token',
+          scope:
+            'https://www.googleapis.com/auth/drive.readonly https://www.googleapis.com/auth/drive.metadata.readonly',
+        },
+      });
+    });
+  });
+
   describe('searchFiles action', () => {
     it('should search files with a query', async () => {
       const mockResponse = {
diff --git a/src/platform/packages/shared/kbn-connector-specs/src/specs/google_drive/google_drive.ts b/src/platform/packages/shared/kbn-connector-specs/src/specs/google_drive/google_drive.ts
index ac3bf3642d844..e0c3601d6e1b2 100644
--- a/src/platform/packages/shared/kbn-connector-specs/src/specs/google_drive/google_drive.ts
+++ b/src/platform/packages/shared/kbn-connector-specs/src/specs/google_drive/google_drive.ts
@@ -60,7 +60,18 @@ export const GoogleDriveConnector: ConnectorSpec = {
     supportedFeatureIds: ['workflows', 'agentBuilder'],
   },
   auth: {
-    types: ['bearer'],
+    types: [
+      'bearer',
+      {
+        type: 'oauth_authorization_code',
+        defaults: {
+          authorizationUrl: 'https://accounts.google.com/o/oauth2/v2/auth',
+          tokenUrl: 'https://oauth2.googleapis.com/token',
+          scope:
+            'https://www.googleapis.com/auth/drive.readonly https://www.googleapis.com/auth/drive.metadata.readonly',
+        },
+      },
+    ],
     headers: {
       Accept: 'application/json',
     },