diff --git a/CHANGELOG.md b/CHANGELOG.md
index be89b51975..cce96c3186 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - Allow configuration of outgoing webhook timeout via `OUTGOING_WEBHOOK_TIMEOUT` environment variable @kevindw-fluxys ([#3801](https://github.com/grafana/oncall/pull/3801))
+- Include teams info in users API ([#3817](https://github.com/grafana/oncall/pull/3817))
 
 ### Fixed
 
diff --git a/docs/sources/oncall-api-reference/users.md b/docs/sources/oncall-api-reference/users.md
index 04adcf1d25..434a2afdf9 100644
--- a/docs/sources/oncall-api-reference/users.md
+++ b/docs/sources/oncall-api-reference/users.md
@@ -29,7 +29,8 @@ The above command returns JSON structured in the following way:
   ],
   "username": "alex",
   "role": "admin",
-  "timezone": "UTC"
+  "timezone": "UTC",
+  "teams": []
 }
 ```
 
@@ -47,6 +48,7 @@ Use `{{API_URL}}/api/v1/users/current` to retrieve the current user.
 | `username` | Yes/org | User username                                                      |
 | `role`     |   No    | One of: `user`, `observer`, `admin`.                               |
 | `timezone` |   No    | timezone of the user one of [time zones](https://en.wikipedia.org/wiki/List_of_tz_database_time_zones).                               |
+| `teams`    |   No    | List of team IDs the user belongs to                               |
 
 # List Users
 
@@ -76,7 +78,8 @@ The above command returns JSON structured in the following way:
       ],
       "username": "alex",
       "role": "admin",
-      "timezone": "UTC"
+      "timezone": "UTC",
+      "teams": ["TAAM1K1NNEHAG"]
     }
   ],
   "current_page_number": 1,
diff --git a/engine/apps/public_api/serializers/users.py b/engine/apps/public_api/serializers/users.py
index 4c3df2f46b..de0a2fecea 100644
--- a/engine/apps/public_api/serializers/users.py
+++ b/engine/apps/public_api/serializers/users.py
@@ -7,8 +7,8 @@
 
 
 class SlackUserIdentitySerializer(serializers.ModelSerializer):
-    user_id = serializers.CharField(source="slack_id")
-    team_id = serializers.CharField(source="slack_team_identity.slack_id")
+    user_id: str = serializers.CharField(source="slack_id")
+    team_id: str = serializers.CharField(source="slack_team_identity.slack_id")
 
     class Meta:
         model = SlackUserIdentity
@@ -19,49 +19,51 @@ class Meta:
 
 
 class FastUserSerializer(serializers.ModelSerializer):
-    id = serializers.ReadOnlyField(read_only=True, source="public_primary_key")
-    email = serializers.EmailField(read_only=True)
-    role = serializers.SerializerMethodField()  # LEGACY, should be removed eventually
-    is_phone_number_verified = serializers.SerializerMethodField()
+    id: str = serializers.ReadOnlyField(read_only=True, source="public_primary_key")
+    email: str = serializers.EmailField(read_only=True)
+    role: str = serializers.SerializerMethodField()  # LEGACY, should be removed eventually
+    is_phone_number_verified: bool = serializers.SerializerMethodField()
 
     class Meta:
         model = User
         fields = ["id", "email", "username", "role", "is_phone_number_verified"]
 
     @staticmethod
-    def get_role(obj):
+    def get_role(obj: User) -> str:
         """
         LEGACY, should be removed eventually
         """
         return LegacyAccessControlRole(obj.role).name.lower()
 
-    def get_is_phone_number_verified(self, obj):
+    def get_is_phone_number_verified(self, obj: User) -> bool:
         return obj.verified_phone_number is not None
 
 
 class UserSerializer(serializers.ModelSerializer, EagerLoadingMixin):
-    id = serializers.ReadOnlyField(read_only=True, source="public_primary_key")
-    email = serializers.EmailField(read_only=True)
-    slack = SlackUserIdentitySerializer(read_only=True, source="slack_user_identity")
-    role = serializers.SerializerMethodField()  # LEGACY, should be removed eventually
-    is_phone_number_verified = serializers.SerializerMethodField()
+    id: str = serializers.ReadOnlyField(read_only=True, source="public_primary_key")
+    email: str = serializers.EmailField(read_only=True)
+    slack: SlackUserIdentity = SlackUserIdentitySerializer(read_only=True, source="slack_user_identity")
+    role: str = serializers.SerializerMethodField()  # LEGACY, should be removed eventually
+    is_phone_number_verified: bool = serializers.SerializerMethodField()
+    teams: list[str] = serializers.SlugRelatedField(read_only=True, many=True, slug_field="public_primary_key")
 
     SELECT_RELATED = [
         "slack_user_identity",
         "slack_user_identity__slack_team_identity",
     ]
+    PREFETCH_RELATED = ["teams"]
 
     class Meta:
         model = User
-        fields = ["id", "email", "slack", "username", "role", "is_phone_number_verified", "timezone"]
+        fields = ["id", "email", "slack", "username", "role", "is_phone_number_verified", "timezone", "teams"]
         read_only_fields = ["timezone"]
 
     @staticmethod
-    def get_role(obj):
+    def get_role(obj: User) -> str:
         """
         LEGACY, should be removed eventually
         """
         return LegacyAccessControlRole(obj.role).name.lower()
 
-    def get_is_phone_number_verified(self, obj):
+    def get_is_phone_number_verified(self, obj: User) -> bool:
         return obj.verified_phone_number is not None
diff --git a/engine/apps/public_api/tests/test_users.py b/engine/apps/public_api/tests/test_users.py
index 433ac4854b..3c7cd54267 100644
--- a/engine/apps/public_api/tests/test_users.py
+++ b/engine/apps/public_api/tests/test_users.py
@@ -35,6 +35,7 @@ def test_get_user(
         "role": "admin",
         "is_phone_number_verified": False,
         "timezone": user.timezone,
+        "teams": [],
     }
 
     assert response.status_code == status.HTTP_200_OK
@@ -51,10 +52,13 @@ def test_get_user(
 @pytest.mark.django_db
 def test_get_users_list(
     user_public_api_setup,
+    make_team,
     make_user_for_organization,
 ):
     organization, user_1, token, slack_team_identity, slack_user_identity = user_public_api_setup
+    team = make_team(organization)
     user_2 = make_user_for_organization(organization)
+    user_2.teams.add(team)
 
     client = APIClient()
 
@@ -74,6 +78,7 @@ def test_get_users_list(
                 "role": "admin",
                 "is_phone_number_verified": False,
                 "timezone": user_1.timezone,
+                "teams": [],
             },
             {
                 "id": user_2.public_primary_key,
@@ -83,6 +88,7 @@ def test_get_users_list(
                 "role": "admin",
                 "is_phone_number_verified": False,
                 "timezone": user_2.timezone,
+                "teams": [team.public_primary_key],
             },
         ],
         "current_page_number": 1,