diff --git a/setup.py b/setup.py
index 9cd6efa7..c6608cb5 100644
--- a/setup.py
+++ b/setup.py
@@ -82,6 +82,7 @@
             "oca-configure-travis= tools.configure_travis:main",
             "oca-create-branch = tools.create_branch:main",
             "oca-copier-update = tools.copier_update:main",
+            "oca-patch-branch = tools.patch_branch:main",
         ],
     },
 )
diff --git a/tools/patch_branch.py b/tools/patch_branch.py
new file mode 100644
index 00000000..dbb86294
--- /dev/null
+++ b/tools/patch_branch.py
@@ -0,0 +1,35 @@
+"""Apply a patch with git am on a branch in all addons project.
+"""
+import os
+import subprocess
+
+import click
+
+from .oca_projects import BranchNotFoundError, get_repositories, temporary_clone
+
+
+@click.command()
+@click.argument("branch")
+@click.argument("patch-file", type=click.Path(exists=True, dir_okay=False))
+def main(branch, patch_file):
+    patch_file = os.path.abspath(patch_file)
+    for repo in get_repositories():
+        try:
+            with temporary_clone(repo, branch):
+                print("=" * 10, repo, "=" * 10)
+                # set git user/email
+                subprocess.check_call(
+                    ["git", "config", "user.name", "oca-git-bot"],
+                )
+                subprocess.check_call(
+                    ["git", "config", "user.email", "oca-git-bot@odoo-community.org"],
+                )
+                # apply patch and commit
+                r = subprocess.call(["git", "am", patch_file])
+                if r != 0:
+                    continue
+                # subprocess.check_call(["pre-commit", "run", "-a"])
+                # subprocess.check_call(["git", "commit", "-am", commit_message])
+                subprocess.check_call(["git", "push"])
+        except BranchNotFoundError:
+            pass