diff --git a/aider_gitea/__main__.py b/aider_gitea/__main__.py
index 7742579..a10730b 100644
--- a/aider_gitea/__main__.py
+++ b/aider_gitea/__main__.py
@@ -25,7 +25,10 @@ def parse_args():
         help='Base URL for the Gitea instance, e.g., https://gitfub.space/api/v1',
     )
     parser.add_argument('--owner', required=True, help='Owner of the repository')
-    parser.add_argument('--repo', required=True, help='Repository name')
+    parser.add_argument(
+        '--repo',
+        help='Repository name. If not specified, all repositories for the owner will be scanned.',
+    )
     parser.add_argument(
         '--base-branch',
         default='main',
@@ -58,15 +61,36 @@ def main():
         )
         try:
             while True:
-                logger.info('Checking for new issues...')
-                handle_issues(args, client, seen_issues_db)
-                logger.info(f'Sleeping for {args.interval} seconds...')
-                time.sleep(args.interval)
+                if args.repo:
+                    logger.info('Checking for new issues...')
+                    handle_issues(args, client, seen_issues_db)
+                    logger.info(f'Sleeping for {args.interval} seconds...')
+                    time.sleep(args.interval)
+                else:
+                    repositories = client.get_user_repositories(args.owner)
+                    for repo in repositories:
+                        args_copy = argparse.Namespace()
+                        args_copy.gitea_url = args.gitea_url
+                        args_copy.owner = args.owner
+                        args_copy.repo = repo
+                        args_copy.base_branch = args.base_branch
+                        handle_issues(args_copy, client, seen_issues_db)
+                        time.sleep(args.interval)
         except KeyboardInterrupt:
             logger.exception('Daemon stopped by user')
     else:
         # One-off run
-        handle_issues(args, client, seen_issues_db)
+        if args.repo:
+            handle_issues(args, client, seen_issues_db)
+        else:
+            repositories = client.get_user_repositories(args.owner)
+            for repo in repositories:
+                args_copy = argparse.Namespace()
+                args_copy.gitea_url = args.gitea_url
+                args_copy.owner = args.owner
+                args_copy.repo = repo
+                args_copy.base_branch = args.base_branch
+                handle_issues(args_copy, client, seen_issues_db)
 
 
 if __name__ == '__main__':
diff --git a/aider_gitea/gitea_client.py b/aider_gitea/gitea_client.py
index 1603fb6..dd25cd4 100644
--- a/aider_gitea/gitea_client.py
+++ b/aider_gitea/gitea_client.py
@@ -106,3 +106,19 @@ class GiteaClient:
             if any(label.get('name') == 'aider' for label in issue.get('labels', []))
         ]
         return issues
+
+    def get_user_repositories(self, owner: str) -> list:
+        """
+        Get a list of repositories for a given user.
+
+        Args:
+            owner (str): The owner of the repositories.
+
+        Returns:
+            list: A list of repository names.
+        """
+        url = f'{self.gitea_url}/users/{owner}/repos'
+        response = self.session.get(url)
+        response.raise_for_status()
+        repos = response.json()
+        return [repo['name'] for repo in repos]