diff --git a/src/backend/core/api/viewsets.py b/src/backend/core/api/viewsets.py
index 1d66ffcc..03777ad6 100644
--- a/src/backend/core/api/viewsets.py
+++ b/src/backend/core/api/viewsets.py
@@ -635,54 +635,76 @@ class DocumentViewSet(
         """Override to implement a soft delete instead of dumping the record in database."""
         instance.soft_delete()
 
-    def perform_update(self, serializer):
-        """Check rules about collaboration."""
-        if serializer.validated_data.get("websocket"):
-            return super().perform_update(serializer)
-
+    def _can_user_edit_document(self, document_id, set_cache=False):
+        """Check if the user can edit the document."""
         try:
-            connection_info = CollaborationService().get_document_connection_info(
-                serializer.instance.id,
+            count, exists = CollaborationService().get_document_connection_info(
+                document_id,
                 self.request.session.session_key,
             )
         except requests.HTTPError as e:
-            capture_exception(e)
-            connection_info = {
-                "count": 0,
-                "exists": False,
-            }
+            logger.exception("Failed to call collaboration server: %s", e)
+            count = 0
+            exists = False
 
-        if connection_info["count"] == 0:
-            # No websocket mode
+        if count == 0:
+            # Nobody is connected to the websocket server
             logger.debug("update without connection found in the websocket server")
-            cache_key = f"docs:no-websocket:{serializer.instance.id}"
+            cache_key = f"docs:no-websocket:{document_id}"
             current_editor = cache.get(cache_key)
-            if not current_editor:
-                cache.set(
-                    cache_key,
-                    self.request.session.session_key,
-                    settings.NO_WEBSOCKET_CACHE_TIMEOUT,
-                )
-            elif current_editor != self.request.session.session_key:
-                raise drf.exceptions.PermissionDenied(
-                    "You are not allowed to edit this document."
-                )
-            cache.touch(cache_key, settings.NO_WEBSOCKET_CACHE_TIMEOUT)
-            return super().perform_update(serializer)
 
-        if connection_info["exists"]:
-            # Websocket mode
+            if not current_editor:
+                if set_cache:
+                    cache.set(
+                        cache_key,
+                        self.request.session.session_key,
+                        settings.NO_WEBSOCKET_CACHE_TIMEOUT,
+                    )
+                return True
+
+            if current_editor != self.request.session.session_key:
+                return False
+
+            if set_cache:
+                cache.touch(cache_key, settings.NO_WEBSOCKET_CACHE_TIMEOUT)
+            return True
+
+        if exists:
+            # Current user is connected to the websocket server
             logger.debug("session key found in the websocket server")
-            return super().perform_update(serializer)
+            return True
 
         logger.debug(
             "Users connected to the websocket but current editor not connected to it. Can not edit."
         )
 
+        return False
+
+    def perform_update(self, serializer):
+        """Check rules about collaboration."""
+        if serializer.validated_data.get("websocket", False):
+            return super().perform_update(serializer)
+
+        if self._can_user_edit_document(serializer.instance.id, set_cache=True):
+            return super().perform_update(serializer)
+
         raise drf.exceptions.PermissionDenied(
             "You are not allowed to edit this document."
         )
 
+    @drf.decorators.action(
+        detail=True,
+        methods=["get"],
+        url_path="can-edit",
+    )
+    def can_edit(self, request, *args, **kwargs):
+        """Check if the current user can edit the document."""
+        document = self.get_object()
+
+        return drf.response.Response(
+            {"can_edit": self._can_user_edit_document(document.id)}
+        )
+
     @drf.decorators.action(
         detail=False,
         methods=["get"],
diff --git a/src/backend/core/models.py b/src/backend/core/models.py
index 9d8d2db5..ead7161e 100644
--- a/src/backend/core/models.py
+++ b/src/backend/core/models.py
@@ -836,6 +836,7 @@ class Document(MP_Node, BaseModel):
             "ai_translate": ai_access,
             "attachment_upload": can_update,
             "media_check": can_get,
+            "can_edit": can_update,
             "children_list": can_get,
             "children_create": can_update and user.is_authenticated,
             "collaboration_auth": can_get,
diff --git a/src/backend/core/services/collaboration_services.py b/src/backend/core/services/collaboration_services.py
index fe6229c5..ae4df1d5 100644
--- a/src/backend/core/services/collaboration_services.py
+++ b/src/backend/core/services/collaboration_services.py
@@ -67,5 +67,5 @@ class CollaborationService:
                 f"Failed to get document connection info. Status code: {response.status_code}, "
                 f"Response: {response.text}"
             )
-
-        return response.json()
+        result = response.json()
+        return result.get("count", 0), result.get("exists", False)
diff --git a/src/backend/core/tests/documents/test_api_documents_can_edit.py b/src/backend/core/tests/documents/test_api_documents_can_edit.py
new file mode 100644
index 00000000..83695873
--- /dev/null
+++ b/src/backend/core/tests/documents/test_api_documents_can_edit.py
@@ -0,0 +1,220 @@
+"""Test the can_edit endpoint in the viewset DocumentViewSet."""
+
+from django.core.cache import cache
+
+import pytest
+import responses
+from rest_framework.test import APIClient
+
+from core import factories
+
+pytestmark = pytest.mark.django_db
+
+
+def test_api_documents_can_edit_anonymous():
+    """Anonymous users can not edit documents."""
+    document = factories.DocumentFactory()
+    client = APIClient()
+    response = client.get(f"/api/v1.0/documents/{document.id!s}/can-edit/")
+    assert response.status_code == 401
+
+
+@responses.activate
+def test_api_documents_can_edit_authenticated_no_websocket(settings):
+    """
+    A user not connected to the websocket and no other user have already updated the document,
+    the document can be updated.
+    """
+    user = factories.UserFactory(with_owned_document=True)
+    client = APIClient()
+    client.force_login(user)
+    session_key = client.session.session_key
+
+    document = factories.DocumentFactory(users=[(user, "editor")])
+
+    settings.COLLABORATION_API_URL = "http://example.com/"
+    settings.COLLABORATION_SERVER_SECRET = "secret-token"
+    endpoint_url = (
+        f"{settings.COLLABORATION_API_URL}get-connections/"
+        f"?room={document.id}&sessionKey={session_key}"
+    )
+
+    ws_resp = responses.get(endpoint_url, json={"count": 0, "exists": False})
+
+    assert cache.get(f"docs:no-websocket:{document.id}") is None
+
+    response = client.get(
+        f"/api/v1.0/documents/{document.id!s}/can-edit/",
+    )
+    assert response.status_code == 200
+
+    assert response.json() == {"can_edit": True}
+    assert ws_resp.call_count == 1
+
+
+@responses.activate
+def test_api_documents_can_edit_authenticated_no_websocket_user_already_editing(
+    settings,
+):
+    """
+    A user not connected to the websocket and another user have already updated the document,
+    the document can not be updated.
+    """
+    user = factories.UserFactory(with_owned_document=True)
+    client = APIClient()
+    client.force_login(user)
+    session_key = client.session.session_key
+
+    document = factories.DocumentFactory(users=[(user, "editor")])
+
+    settings.COLLABORATION_API_URL = "http://example.com/"
+    settings.COLLABORATION_SERVER_SECRET = "secret-token"
+    endpoint_url = (
+        f"{settings.COLLABORATION_API_URL}get-connections/"
+        f"?room={document.id}&sessionKey={session_key}"
+    )
+    ws_resp = responses.get(endpoint_url, json={"count": 0, "exists": False})
+
+    cache.set(f"docs:no-websocket:{document.id}", "other_session_key")
+
+    response = client.get(
+        f"/api/v1.0/documents/{document.id!s}/can-edit/",
+    )
+    assert response.status_code == 200
+    assert response.json() == {"can_edit": False}
+
+    assert ws_resp.call_count == 1
+
+
+@responses.activate
+def test_api_documents_can_edit_no_websocket_other_user_connected_to_websocket(
+    settings,
+):
+    """
+    A user not connected to the websocket and another user is connected to the websocket,
+    the document can not be updated.
+    """
+    user = factories.UserFactory(with_owned_document=True)
+    client = APIClient()
+    client.force_login(user)
+    session_key = client.session.session_key
+
+    document = factories.DocumentFactory(users=[(user, "editor")])
+
+    settings.COLLABORATION_API_URL = "http://example.com/"
+    settings.COLLABORATION_SERVER_SECRET = "secret-token"
+    endpoint_url = (
+        f"{settings.COLLABORATION_API_URL}get-connections/"
+        f"?room={document.id}&sessionKey={session_key}"
+    )
+    ws_resp = responses.get(endpoint_url, json={"count": 3, "exists": False})
+
+    assert cache.get(f"docs:no-websocket:{document.id}") is None
+
+    response = client.get(
+        f"/api/v1.0/documents/{document.id!s}/can-edit/",
+    )
+    assert response.status_code == 200
+    assert response.json() == {"can_edit": False}
+    assert cache.get(f"docs:no-websocket:{document.id}") is None
+    assert ws_resp.call_count == 1
+
+
+@responses.activate
+def test_api_documents_can_edit_user_connected_to_websocket(settings):
+    """
+    A user connected to the websocket, the document can be updated.
+    """
+    user = factories.UserFactory(with_owned_document=True)
+    client = APIClient()
+    client.force_login(user)
+    session_key = client.session.session_key
+
+    document = factories.DocumentFactory(users=[(user, "editor")])
+
+    settings.COLLABORATION_API_URL = "http://example.com/"
+    settings.COLLABORATION_SERVER_SECRET = "secret-token"
+    endpoint_url = (
+        f"{settings.COLLABORATION_API_URL}get-connections/"
+        f"?room={document.id}&sessionKey={session_key}"
+    )
+    ws_resp = responses.get(endpoint_url, json={"count": 3, "exists": True})
+
+    assert cache.get(f"docs:no-websocket:{document.id}") is None
+
+    response = client.get(
+        f"/api/v1.0/documents/{document.id!s}/can-edit/",
+    )
+    assert response.status_code == 200
+    assert response.json() == {"can_edit": True}
+    assert cache.get(f"docs:no-websocket:{document.id}") is None
+    assert ws_resp.call_count == 1
+
+
+@responses.activate
+def test_api_documents_can_edit_websocket_server_unreachable_fallback_to_no_websocket(
+    settings,
+):
+    """
+    When the websocket server is unreachable, the document can be updated like if the user was
+    not connected to the websocket.
+    """
+    user = factories.UserFactory(with_owned_document=True)
+    client = APIClient()
+    client.force_login(user)
+    session_key = client.session.session_key
+
+    document = factories.DocumentFactory(users=[(user, "editor")])
+
+    settings.COLLABORATION_API_URL = "http://example.com/"
+    settings.COLLABORATION_SERVER_SECRET = "secret-token"
+    endpoint_url = (
+        f"{settings.COLLABORATION_API_URL}get-connections/"
+        f"?room={document.id}&sessionKey={session_key}"
+    )
+    ws_resp = responses.get(endpoint_url, status=500)
+
+    assert cache.get(f"docs:no-websocket:{document.id}") is None
+
+    response = client.get(
+        f"/api/v1.0/documents/{document.id!s}/can-edit/",
+    )
+    assert response.status_code == 200
+    assert response.json() == {"can_edit": True}
+
+    assert ws_resp.call_count == 1
+
+
+@responses.activate
+def test_api_documents_can_edit_websocket_server_unreachable_fallback_to_no_websocket_other_users(
+    settings,
+):
+    """
+    When the websocket server is unreachable, the behavior fallback to the no websocket one.
+    If an other user is already editing, the document can not be updated.
+    """
+    user = factories.UserFactory(with_owned_document=True)
+    client = APIClient()
+    client.force_login(user)
+    session_key = client.session.session_key
+
+    document = factories.DocumentFactory(users=[(user, "editor")])
+
+    settings.COLLABORATION_API_URL = "http://example.com/"
+    settings.COLLABORATION_SERVER_SECRET = "secret-token"
+    endpoint_url = (
+        f"{settings.COLLABORATION_API_URL}get-connections/"
+        f"?room={document.id}&sessionKey={session_key}"
+    )
+    ws_resp = responses.get(endpoint_url, status=500)
+
+    cache.set(f"docs:no-websocket:{document.id}", "other_session_key")
+
+    response = client.get(
+        f"/api/v1.0/documents/{document.id!s}/can-edit/",
+    )
+    assert response.status_code == 200
+    assert response.json() == {"can_edit": False}
+
+    assert cache.get(f"docs:no-websocket:{document.id}") == "other_session_key"
+    assert ws_resp.call_count == 1
diff --git a/src/backend/core/tests/documents/test_api_documents_retrieve.py b/src/backend/core/tests/documents/test_api_documents_retrieve.py
index 80b135d3..fbecf2f5 100644
--- a/src/backend/core/tests/documents/test_api_documents_retrieve.py
+++ b/src/backend/core/tests/documents/test_api_documents_retrieve.py
@@ -31,6 +31,7 @@ def test_api_documents_retrieve_anonymous_public_standalone():
             "ai_transform": False,
             "ai_translate": False,
             "attachment_upload": document.link_role == "editor",
+            "can_edit": document.link_role == "editor",
             "children_create": False,
             "children_list": True,
             "collaboration_auth": True,
@@ -99,6 +100,7 @@ def test_api_documents_retrieve_anonymous_public_parent():
             "ai_transform": False,
             "ai_translate": False,
             "attachment_upload": grand_parent.link_role == "editor",
+            "can_edit": grand_parent.link_role == "editor",
             "children_create": False,
             "children_list": True,
             "collaboration_auth": True,
@@ -196,6 +198,7 @@ def test_api_documents_retrieve_authenticated_unrelated_public_or_authenticated(
             "ai_transform": document.link_role == "editor",
             "ai_translate": document.link_role == "editor",
             "attachment_upload": document.link_role == "editor",
+            "can_edit": document.link_role == "editor",
             "children_create": document.link_role == "editor",
             "children_list": True,
             "collaboration_auth": True,
@@ -271,6 +274,7 @@ def test_api_documents_retrieve_authenticated_public_or_authenticated_parent(rea
             "ai_transform": grand_parent.link_role == "editor",
             "ai_translate": grand_parent.link_role == "editor",
             "attachment_upload": grand_parent.link_role == "editor",
+            "can_edit": grand_parent.link_role == "editor",
             "children_create": grand_parent.link_role == "editor",
             "children_list": True,
             "collaboration_auth": True,
@@ -452,6 +456,7 @@ def test_api_documents_retrieve_authenticated_related_parent():
             "ai_transform": access.role != "reader",
             "ai_translate": access.role != "reader",
             "attachment_upload": access.role != "reader",
+            "can_edit": access.role != "reader",
             "children_create": access.role != "reader",
             "children_list": True,
             "collaboration_auth": True,
diff --git a/src/backend/core/tests/documents/test_api_documents_trashbin.py b/src/backend/core/tests/documents/test_api_documents_trashbin.py
index 4e4eb276..61ccc021 100644
--- a/src/backend/core/tests/documents/test_api_documents_trashbin.py
+++ b/src/backend/core/tests/documents/test_api_documents_trashbin.py
@@ -75,6 +75,7 @@ def test_api_documents_trashbin_format():
             "ai_transform": True,
             "ai_translate": True,
             "attachment_upload": True,
+            "can_edit": True,
             "children_create": True,
             "children_list": True,
             "collaboration_auth": True,
diff --git a/src/backend/core/tests/test_models_documents.py b/src/backend/core/tests/test_models_documents.py
index 1e81e83c..a791f3d8 100644
--- a/src/backend/core/tests/test_models_documents.py
+++ b/src/backend/core/tests/test_models_documents.py
@@ -155,6 +155,7 @@ def test_models_documents_get_abilities_forbidden(
         "ai_transform": False,
         "ai_translate": False,
         "attachment_upload": False,
+        "can_edit": False,
         "children_create": False,
         "children_list": False,
         "collaboration_auth": False,
@@ -216,6 +217,7 @@ def test_models_documents_get_abilities_reader(
         "ai_transform": False,
         "ai_translate": False,
         "attachment_upload": False,
+        "can_edit": False,
         "children_create": False,
         "children_list": True,
         "collaboration_auth": True,
@@ -279,6 +281,7 @@ def test_models_documents_get_abilities_editor(
         "ai_transform": is_authenticated,
         "ai_translate": is_authenticated,
         "attachment_upload": True,
+        "can_edit": True,
         "children_create": is_authenticated,
         "children_list": True,
         "collaboration_auth": True,
@@ -331,6 +334,7 @@ def test_models_documents_get_abilities_owner(django_assert_num_queries):
         "ai_transform": True,
         "ai_translate": True,
         "attachment_upload": True,
+        "can_edit": True,
         "children_create": True,
         "children_list": True,
         "collaboration_auth": True,
@@ -380,6 +384,7 @@ def test_models_documents_get_abilities_administrator(django_assert_num_queries)
         "ai_transform": True,
         "ai_translate": True,
         "attachment_upload": True,
+        "can_edit": True,
         "children_create": True,
         "children_list": True,
         "collaboration_auth": True,
@@ -432,6 +437,7 @@ def test_models_documents_get_abilities_editor_user(django_assert_num_queries):
         "ai_transform": True,
         "ai_translate": True,
         "attachment_upload": True,
+        "can_edit": True,
         "children_create": True,
         "children_list": True,
         "collaboration_auth": True,
@@ -491,6 +497,7 @@ def test_models_documents_get_abilities_reader_user(
         "ai_transform": access_from_link and ai_access_setting != "restricted",
         "ai_translate": access_from_link and ai_access_setting != "restricted",
         "attachment_upload": access_from_link,
+        "can_edit": access_from_link,
         "children_create": access_from_link,
         "children_list": True,
         "collaboration_auth": True,
@@ -548,6 +555,7 @@ def test_models_documents_get_abilities_preset_role(django_assert_num_queries):
         "ai_transform": False,
         "ai_translate": False,
         "attachment_upload": False,
+        "can_edit": False,
         "children_create": False,
         "children_list": True,
         "collaboration_auth": True,