diff --git a/backend/core/models/user_identity.py b/backend/core/models/user_identity.py
new file mode 100644
index 000000000..aac40b8cd
--- /dev/null
+++ b/backend/core/models/user_identity.py
@@ -0,0 +1,9 @@
+from typing import Optional
+from uuid import UUID
+
+from pydantic import BaseModel
+
+
+class UserIdentity(BaseModel):
+    user_id: UUID
+    openai_api_key: Optional[str] = None
diff --git a/backend/core/models/users.py b/backend/core/models/users.py
index 0ebc05e5b..5294f1ac7 100644
--- a/backend/core/models/users.py
+++ b/backend/core/models/users.py
@@ -2,19 +2,20 @@ from typing import Optional
 from uuid import UUID
 
 from logger import get_logger
-from models.settings import common_dependencies
 from pydantic import BaseModel
 
+from models.settings import common_dependencies
+
 logger = get_logger(__name__)
 
 
+# [TODO] Rename the user table and its references to 'user_usage'
 class User(BaseModel):
     id: UUID
     email: Optional[str]
     user_openai_api_key: Optional[str] = None
     requests_count: int = 0
 
-    # [TODO] Rename the user table and its references to 'user_usage'
     def create_user(self, date):
         """
         Create a new user entry in the database
diff --git a/backend/core/repository/user_identity/create_user_identity.py b/backend/core/repository/user_identity/create_user_identity.py
new file mode 100644
index 000000000..26d95e8f6
--- /dev/null
+++ b/backend/core/repository/user_identity/create_user_identity.py
@@ -0,0 +1,13 @@
+from models.settings import common_dependencies
+from models.user_identity import UserIdentity
+
+
+def create_user_identity(user_identity: UserIdentity) -> UserIdentity:
+    commons = common_dependencies()
+    user_identity_dict = user_identity.dict()
+    user_identity_dict["user_id"] = str(user_identity.user_id)
+    response = (
+        commons["supabase"].from_("user_identity").insert(user_identity_dict).execute()
+    )
+
+    return UserIdentity(**response.data[0])
diff --git a/backend/core/repository/user_identity/get_user_identity.py b/backend/core/repository/user_identity/get_user_identity.py
new file mode 100644
index 000000000..0e3c2a236
--- /dev/null
+++ b/backend/core/repository/user_identity/get_user_identity.py
@@ -0,0 +1,21 @@
+from uuid import UUID
+
+from models.settings import common_dependencies
+from models.user_identity import UserIdentity
+from repository.user_identity.create_user_identity import create_user_identity
+
+
+def get_user_identity(user_id: UUID) -> UserIdentity:
+    commons = common_dependencies()
+    response = (
+        commons["supabase"]
+        .from_("user_identity")
+        .select("*")
+        .filter("user_id", "eq", user_id)
+        .execute()
+    )
+
+    if len(response.data) == 0:
+        return create_user_identity(UserIdentity(user_id=user_id))
+
+    return UserIdentity(**response.data[0])
diff --git a/backend/core/repository/user_identity/update_user_identity.py b/backend/core/repository/user_identity/update_user_identity.py
new file mode 100644
index 000000000..a30136e2b
--- /dev/null
+++ b/backend/core/repository/user_identity/update_user_identity.py
@@ -0,0 +1,36 @@
+from typing import Optional
+from uuid import UUID
+
+from models.settings import common_dependencies
+from models.user_identity import UserIdentity
+from pydantic import BaseModel
+from repository.user_identity.create_user_identity import (
+    create_user_identity,
+)
+
+
+class UserIdentityUpdatableProperties(BaseModel):
+    openai_api_key: Optional[str]
+
+
+def update_user_identity(
+    user_id: UUID,
+    user_identity_updatable_properties: UserIdentityUpdatableProperties,
+) -> UserIdentity:
+    commons = common_dependencies()
+    response = (
+        commons["supabase"]
+        .from_("user_identity")
+        .update(user_identity_updatable_properties.__dict__)
+        .filter("user_id", "eq", user_id)
+        .execute()
+    )
+
+    if len(response.data) == 0:
+        user_identity = UserIdentity(
+            user_id=user_id,
+            openai_api_key=user_identity_updatable_properties.openai_api_key,
+        )
+        return create_user_identity(user_identity)
+
+    return UserIdentity(**response.data[0])
diff --git a/backend/core/routes/user_routes.py b/backend/core/routes/user_routes.py
index ae0b68c8f..c54fc455f 100644
--- a/backend/core/routes/user_routes.py
+++ b/backend/core/routes/user_routes.py
@@ -5,7 +5,13 @@ from auth import AuthBearer, get_current_user
 from fastapi import APIRouter, Depends, Request
 from models.brains import Brain, get_default_user_brain
 from models.settings import BrainRateLimiting
+from models.user_identity import UserIdentity
 from models.users import User
+from repository.user_identity.get_user_identity import get_user_identity
+from repository.user_identity.update_user_identity import (
+    UserIdentityUpdatableProperties,
+    update_user_identity,
+)
 
 user_router = APIRouter()
 
@@ -56,3 +62,32 @@ async def get_user_endpoint(
         "requests_stats": requests_stats,
         "date": date,
     }
+
+
+@user_router.put(
+    "/user/identity",
+    dependencies=[Depends(AuthBearer())],
+    tags=["User"],
+)
+def update_user_identity_route(
+    user_identity_updatable_properties: UserIdentityUpdatableProperties,
+    current_user: User = Depends(get_current_user),
+) -> UserIdentity:
+    """
+    Update user identity.
+    """
+    return update_user_identity(current_user.id, user_identity_updatable_properties)
+
+
+@user_router.get(
+    "/user/identity",
+    dependencies=[Depends(AuthBearer())],
+    tags=["User"],
+)
+def get_user_identity_route(
+    current_user: User = Depends(get_current_user),
+) -> UserIdentity:
+    """
+    Get user identity.
+    """
+    return get_user_identity(current_user.id)
diff --git a/scripts/20230731172400_add_user_identity_table.sql b/scripts/20230731172400_add_user_identity_table.sql
new file mode 100644
index 000000000..ae5195eb0
--- /dev/null
+++ b/scripts/20230731172400_add_user_identity_table.sql
@@ -0,0 +1,16 @@
+BEGIN;
+
+-- Create user_identity table if it doesn't exist
+CREATE TABLE IF NOT EXISTS user_identity (
+  user_id UUID PRIMARY KEY,
+  openai_api_key VARCHAR(255)
+);
+
+-- Insert migration record if it doesn't exist
+INSERT INTO migrations (name) 
+SELECT '20230731172400_add_user_identity_table'
+WHERE NOT EXISTS (
+    SELECT 1 FROM migrations WHERE name = '20230731172400_add_user_identity_table'
+);
+
+COMMIT;
diff --git a/scripts/tables.sql b/scripts/tables.sql
index 2f0816baa..12c84fb41 100644
--- a/scripts/tables.sql
+++ b/scripts/tables.sql
@@ -167,6 +167,12 @@ CREATE TABLE IF NOT EXISTS brain_subscription_invitations (
   FOREIGN KEY (brain_id) REFERENCES brains (brain_id)
 );
 
+--- Create user_identity table
+CREATE TABLE IF NOT EXISTS user_identity (
+  user_id UUID PRIMARY KEY,
+  openai_api_key VARCHAR(255)
+);
+
 CREATE OR REPLACE FUNCTION public.get_user_email_by_user_id(user_id uuid)
 RETURNS TABLE (email text)
 SECURITY definer
@@ -194,7 +200,7 @@ CREATE TABLE IF NOT EXISTS migrations (
 );
 
 INSERT INTO migrations (name) 
-SELECT '202307241530031_add_fields_to_brain'
+SELECT '20230731172400_add_user_identity_table'
 WHERE NOT EXISTS (
-    SELECT 1 FROM migrations WHERE name = '202307241530031_add_fields_to_brain'
+    SELECT 1 FROM migrations WHERE name = '20230731172400_add_user_identity_table'
 );