diff --git a/packages/backend/src/apps/gmail/actions/index.js b/packages/backend/src/apps/gmail/actions/index.js
index 9a3816a9..28b72220 100644
--- a/packages/backend/src/apps/gmail/actions/index.js
+++ b/packages/backend/src/apps/gmail/actions/index.js
@@ -2,5 +2,6 @@ import createDraft from './create-draft/index.js';
 import replyToEmail from './reply-to-email/index.js';
 import sendEmail from './send-email/index.js';
 import sendToTrash from './send-to-trash/index.js';
+import starEmail from './star-email/index.js';
 
-export default [createDraft, replyToEmail, sendEmail, sendToTrash];
+export default [createDraft, replyToEmail, sendEmail, sendToTrash, starEmail];
diff --git a/packages/backend/src/apps/gmail/actions/send-to-trash/index.js b/packages/backend/src/apps/gmail/actions/send-to-trash/index.js
index 8403025c..60587635 100644
--- a/packages/backend/src/apps/gmail/actions/send-to-trash/index.js
+++ b/packages/backend/src/apps/gmail/actions/send-to-trash/index.js
@@ -8,10 +8,20 @@ export default defineAction({
     {
       label: 'Message ID',
       key: 'messageId',
-      type: 'string',
+      type: 'dropdown',
       required: true,
       description: '',
       variables: true,
+      source: {
+        type: 'query',
+        name: 'getDynamicData',
+        arguments: [
+          {
+            name: 'key',
+            value: 'listMessages',
+          },
+        ],
+      },
     },
   ],
 
diff --git a/packages/backend/src/apps/gmail/actions/star-email/index.js b/packages/backend/src/apps/gmail/actions/star-email/index.js
new file mode 100644
index 00000000..c7e06bcc
--- /dev/null
+++ b/packages/backend/src/apps/gmail/actions/star-email/index.js
@@ -0,0 +1,45 @@
+import defineAction from '../../../../helpers/define-action.js';
+
+export default defineAction({
+  name: 'Star an email',
+  key: 'starEmail',
+  description: 'Star an email message.',
+  arguments: [
+    {
+      label: 'Message ID',
+      key: 'messageId',
+      type: 'dropdown',
+      required: true,
+      description: '',
+      variables: true,
+      source: {
+        type: 'query',
+        name: 'getDynamicData',
+        arguments: [
+          {
+            name: 'key',
+            value: 'listMessages',
+          },
+        ],
+      },
+    },
+  ],
+
+  async run($) {
+    const { messageId } = $.step.parameters;
+    const userId = $.auth.data.userId;
+
+    const body = {
+      addLabelIds: ['STARRED'],
+    };
+
+    const { data } = await $.http.post(
+      `/gmail/v1/users/${userId}/messages/${messageId}/modify`,
+      body
+    );
+
+    $.setActionItem({
+      raw: data,
+    });
+  },
+});
diff --git a/packages/backend/src/apps/gmail/auth/refresh-token.js b/packages/backend/src/apps/gmail/auth/refresh-token.js
index 7c5b7020..2c137caa 100644
--- a/packages/backend/src/apps/gmail/auth/refresh-token.js
+++ b/packages/backend/src/apps/gmail/auth/refresh-token.js
@@ -12,7 +12,12 @@ const refreshToken = async ($) => {
 
   const { data } = await $.http.post(
     'https://oauth2.googleapis.com/token',
-    params.toString()
+    params.toString(),
+    {
+      additionalProperties: {
+        skipAddingAuthHeader: true,
+      },
+    }
   );
 
   await $.auth.set({
diff --git a/packages/backend/src/apps/gmail/common/add-auth-header.js b/packages/backend/src/apps/gmail/common/add-auth-header.js
index 02477aa4..f957ebf9 100644
--- a/packages/backend/src/apps/gmail/common/add-auth-header.js
+++ b/packages/backend/src/apps/gmail/common/add-auth-header.js
@@ -1,5 +1,8 @@
 const addAuthHeader = ($, requestConfig) => {
-  if ($.auth.data?.accessToken) {
+  if (
+    !requestConfig.additionalProperties?.skipAddingAuthHeader &&
+    $.auth.data?.accessToken
+  ) {
     requestConfig.headers.Authorization = `${$.auth.data.tokenType} ${$.auth.data.accessToken}`;
   }
 
diff --git a/packages/backend/src/apps/gmail/dynamic-data/index.js b/packages/backend/src/apps/gmail/dynamic-data/index.js
index a89b1b9b..37661b45 100644
--- a/packages/backend/src/apps/gmail/dynamic-data/index.js
+++ b/packages/backend/src/apps/gmail/dynamic-data/index.js
@@ -1,6 +1,13 @@
 import listEmails from './list-emails/index.js';
 import listLabels from './list-labels/index.js';
+import listMessages from './list-messages/index.js';
 import listSignatures from './list-signatures/index.js';
 import listThreads from './list-threads/index.js';
 
-export default [listEmails, listLabels, listSignatures, listThreads];
+export default [
+  listEmails,
+  listLabels,
+  listMessages,
+  listSignatures,
+  listThreads,
+];
diff --git a/packages/backend/src/apps/gmail/dynamic-data/list-messages/index.js b/packages/backend/src/apps/gmail/dynamic-data/list-messages/index.js
new file mode 100644
index 00000000..077267be
--- /dev/null
+++ b/packages/backend/src/apps/gmail/dynamic-data/list-messages/index.js
@@ -0,0 +1,31 @@
+export default {
+  name: 'List messages',
+  key: 'listMessages',
+
+  async run($) {
+    const messages = {
+      data: [],
+    };
+    const userId = $.auth.data.userId;
+
+    const { data } = await $.http.get(`/gmail/v1/users/${userId}/messages`);
+
+    if (data.messages) {
+      for (const message of data.messages) {
+        const { data: messageData } = await $.http.get(
+          `/gmail/v1/users/${userId}/messages/${message.id}`
+        );
+        const subject = messageData.payload.headers.find(
+          (header) => header.name === 'Subject'
+        );
+
+        messages.data.push({
+          value: message.id,
+          name: subject?.value,
+        });
+      }
+    }
+
+    return messages;
+  },
+};
diff --git a/packages/docs/pages/apps/gmail/actions.md b/packages/docs/pages/apps/gmail/actions.md
index 2ad3178c..0754a728 100644
--- a/packages/docs/pages/apps/gmail/actions.md
+++ b/packages/docs/pages/apps/gmail/actions.md
@@ -9,6 +9,8 @@ items:
     desc: Send a new email message.
   - name: Send to trash
     desc: Send an existing email message to the trash.
+  - name: Star an email
+    desc: Star an email message.
 ---
 
 <script setup>