diff --git a/arkindex/process/api.py b/arkindex/process/api.py
index 8348ff930641d50335a665336eb1f0b95502208f..b1dfb348b851fa2ca1a69f39f43a48305a137ab7 100644
--- a/arkindex/process/api.py
+++ b/arkindex/process/api.py
@@ -922,7 +922,7 @@ class WorkerTypesList(ListAPIView):
                 "mode",
                 type=str,
                 default="complete",
-                description=("If set to `simple`, exclude versions with no tag")
+                description="When this is set to `simple`, only the worker versions with a tag set, or on the `main` or `master` branches, will be returned."
             )
         ],
     ),
@@ -967,8 +967,8 @@ class WorkerVersionList(ListCreateAPIView):
     def get_queryset(self):
         filters = Q()
         if self.simple_mode:
-            # Limit output to versions with tags
-            filters = Q(tag__isnull=False)
+            # Limit output to versions with tags or from the main/master branch
+            filters = Q(tag__isnull=False) | Q(branch__in=["main", "master"])
         return self.worker.versions \
             .using("default") \
             .filter(filters) \
diff --git a/arkindex/process/tests/worker_versions/test_list.py b/arkindex/process/tests/worker_versions/test_list.py
index e670faefdcf44893aad992bec24fd3fddf05998a..4fc3d5800b9d252f60aec39e4a43a3dedf6a1f02 100644
--- a/arkindex/process/tests/worker_versions/test_list.py
+++ b/arkindex/process/tests/worker_versions/test_list.py
@@ -19,6 +19,16 @@ class TestWorkerVersionList(FixtureAPITestCase):
 
         cls.version_1 = cls.worker_reco.versions.get()
         cls.version_2 = cls.worker_dla.versions.get()
+        cls.version_main_branch = cls.worker_reco.versions.create(
+            configuration={},
+            branch="main",
+            revision_url="https://gitlab.com/NERV/eva/commit/12"
+        )
+        cls.version_other_branch = cls.worker_reco.versions.create(
+            configuration={},
+            branch="eva-00",
+            revision_url="https://gitlab.com/NERV/eva/commit/000002"
+        )
 
         farm = Farm.objects.first()
         process = cls.corpus.processes.create(
@@ -52,7 +62,7 @@ class TestWorkerVersionList(FixtureAPITestCase):
             self.assertEqual(response.status_code, status.HTTP_200_OK)
 
         self.assertDictEqual(response.json(), {
-            "count": 2,
+            "count": 4,
             "next": None,
             "number": 1,
             "previous": None,
@@ -79,6 +89,50 @@ class TestWorkerVersionList(FixtureAPITestCase):
                     "revision_url": "https://gitlab.com/NERV/eva/commit/63e377e7f88c743d8428fc4e4eaedfc1c9356754",
                     "created": "2050-09-09T09:09:09.090909Z",
                 },
+                {
+                    "id": str(self.version_other_branch.id),
+                    "configuration": {},
+                    "docker_image_iid": None,
+                    "state": "created",
+                    "gpu_usage": FeatureUsage.Disabled.value,
+                    "model_usage": FeatureUsage.Disabled.value,
+                    "worker": {
+                        "id": str(self.worker_reco.id),
+                        "name": self.worker_reco.name,
+                        "type": self.worker_reco.type.slug,
+                        "slug": self.worker_reco.slug,
+                        "description": self.worker_reco.description,
+                        "archived": bool(self.worker_reco.archived),
+                        "repository_url": self.worker_reco.repository_url,
+                    },
+                    "version": None,
+                    "tag": None,
+                    "branch": "eva-00",
+                    "revision_url": "https://gitlab.com/NERV/eva/commit/000002",
+                    "created": self.version_other_branch.created.isoformat().replace("+00:00", "Z"),
+                },
+                {
+                    "id": str(self.version_main_branch.id),
+                    "configuration": {},
+                    "docker_image_iid": None,
+                    "state": "created",
+                    "gpu_usage": FeatureUsage.Disabled.value,
+                    "model_usage": FeatureUsage.Disabled.value,
+                    "worker": {
+                        "id": str(self.worker_reco.id),
+                        "name": self.worker_reco.name,
+                        "type": self.worker_reco.type.slug,
+                        "slug": self.worker_reco.slug,
+                        "description": self.worker_reco.description,
+                        "archived": bool(self.worker_reco.archived),
+                        "repository_url": self.worker_reco.repository_url,
+                    },
+                    "version": None,
+                    "tag": None,
+                    "branch": "main",
+                    "revision_url": "https://gitlab.com/NERV/eva/commit/12",
+                    "created": self.version_main_branch.created.isoformat().replace("+00:00", "Z"),
+                },
                 {
                     "id": str(self.version_1.id),
                     "configuration": {"test": 42},
@@ -139,8 +193,75 @@ class TestWorkerVersionList(FixtureAPITestCase):
             self.assertEqual(response.status_code, status.HTTP_200_OK)
 
         data = response.json()
-        self.assertEqual(data["count"], 1)
-        self.assertEqual(data["results"][0]["id"], str(self.worker_reco.versions.first().id))
+        self.assertEqual(data["count"], 3)
+        self.assertListEqual(data["results"], [
+            {
+                    "id": str(self.version_other_branch.id),
+                    "configuration": {},
+                    "docker_image_iid": None,
+                    "state": "created",
+                    "gpu_usage": FeatureUsage.Disabled.value,
+                    "model_usage": FeatureUsage.Disabled.value,
+                    "worker": {
+                        "id": str(self.worker_reco.id),
+                        "name": self.worker_reco.name,
+                        "type": self.worker_reco.type.slug,
+                        "slug": self.worker_reco.slug,
+                        "description": self.worker_reco.description,
+                        "archived": bool(self.worker_reco.archived),
+                        "repository_url": self.worker_reco.repository_url,
+                    },
+                    "version": None,
+                    "tag": None,
+                    "branch": "eva-00",
+                    "revision_url": "https://gitlab.com/NERV/eva/commit/000002",
+                    "created": self.version_other_branch.created.isoformat().replace("+00:00", "Z"),
+                },
+                {
+                    "id": str(self.version_main_branch.id),
+                    "configuration": {},
+                    "docker_image_iid": None,
+                    "state": "created",
+                    "gpu_usage": FeatureUsage.Disabled.value,
+                    "model_usage": FeatureUsage.Disabled.value,
+                    "worker": {
+                        "id": str(self.worker_reco.id),
+                        "name": self.worker_reco.name,
+                        "type": self.worker_reco.type.slug,
+                        "slug": self.worker_reco.slug,
+                        "description": self.worker_reco.description,
+                        "archived": bool(self.worker_reco.archived),
+                        "repository_url": self.worker_reco.repository_url,
+                    },
+                    "version": None,
+                    "tag": None,
+                    "branch": "main",
+                    "revision_url": "https://gitlab.com/NERV/eva/commit/12",
+                    "created": self.version_main_branch.created.isoformat().replace("+00:00", "Z"),
+                },
+                {
+                    "id": str(self.version_1.id),
+                    "configuration": {"test": 42},
+                    "docker_image_iid": self.version_1.docker_image_iid,
+                    "state": "available",
+                    "gpu_usage": FeatureUsage.Disabled.value,
+                    "model_usage": FeatureUsage.Disabled.value,
+                    "worker": {
+                        "id": str(self.worker_reco.id),
+                        "name": self.worker_reco.name,
+                        "type": self.worker_reco.type.slug,
+                        "slug": self.worker_reco.slug,
+                        "description": self.worker_reco.description,
+                        "archived": bool(self.worker_reco.archived),
+                        "repository_url": self.worker_reco.repository_url,
+                    },
+                    "version": 1,
+                    "tag": None,
+                    "branch": None,
+                    "revision_url": None,
+                    "created": self.version_1.created.isoformat().replace("+00:00", "Z"),
+                }
+        ])
 
     def test_list_filter_worker(self):
         self.client.force_login(self.user)
@@ -167,7 +288,8 @@ class TestWorkerVersionList(FixtureAPITestCase):
 
     def test_list_simple_mode(self):
         """
-        With the mode attribute set to simple, worker versions with no tag are excluded
+        With the mode attribute set to simple, worker versions with no tag or not from the
+        master / main branch are excluded
         """
         WorkerVersion.objects.bulk_create([
             WorkerVersion(
@@ -186,10 +308,14 @@ class TestWorkerVersionList(FixtureAPITestCase):
             )
             self.assertEqual(response.status_code, status.HTTP_200_OK)
             data = response.json()
-            self.assertEqual(data["count"], 4)
+            self.assertEqual(data["count"], 6)
             self.assertCountEqual(
                 [version["tag"] for version in data["results"]],
-                ["v0.1", "test", None, None],
+                ["v0.1", "test", None, None, None, None],
+            )
+            self.assertCountEqual(
+                [version["branch"] for version in data["results"]],
+                [None, None, None, None, "main", "eva-00"],
             )
 
         # Simple mode filters out versions without a tag
@@ -201,8 +327,12 @@ class TestWorkerVersionList(FixtureAPITestCase):
             )
             self.assertEqual(response.status_code, status.HTTP_200_OK)
             data = response.json()
-            self.assertEqual(data["count"], 2)
+            self.assertEqual(data["count"], 3)
             self.assertCountEqual(
                 [version["tag"] for version in data["results"]],
-                ["v0.1", "test"],
+                ["v0.1", "test", None],
+            )
+            self.assertCountEqual(
+                [version["branch"] for version in data["results"]],
+                [None, None, "main"],
             )