diff --git a/app/api/routers/users.py b/app/api/routers/users.py
index 1b12496..1325f3e 100644
--- a/app/api/routers/users.py
+++ b/app/api/routers/users.py
@@ -30,6 +30,7 @@ def _user_response(user: models.User) -> dict:
         "role_id": user.role_id,
         "role_name": user.role_name,
         "agent_id": user.agent.agent_id if user.agent else None,
+        "discord_user_id": user.discord_user_id,
         "created_at": user.created_at,
     }
     return data
@@ -114,6 +115,7 @@ def create_user(
         username=user.username,
         email=user.email,
         full_name=user.full_name,
+        discord_user_id=user.discord_user_id,
         hashed_password=hashed_password,
         is_admin=False,
         is_active=True,
@@ -202,6 +204,9 @@ def update_user(
             raise HTTPException(status_code=400, detail="You cannot deactivate your own account")
         user.is_active = payload.is_active
 
+    if payload.discord_user_id is not None:
+        user.discord_user_id = payload.discord_user_id or None
+
     db.commit()
     db.refresh(user)
     return _user_response(user)
diff --git a/app/main.py b/app/main.py
index 09a45de..e8a34eb 100644
--- a/app/main.py
+++ b/app/main.py
@@ -271,6 +271,9 @@ def _migrate_schema():
             db.execute(text("ALTER TABLE users ADD COLUMN role_id INTEGER NULL"))
             _ensure_fk(db, "users", "role_id", "roles", "id", "fk_users_role_id")
 
+        if _has_table(db, "users") and not _has_column(db, "users", "discord_user_id"):
+            db.execute(text("ALTER TABLE users ADD COLUMN discord_user_id VARCHAR(32) NULL"))
+
         # --- monitored_servers.api_key for heartbeat v2 ---
         if _has_table(db, "monitored_servers") and not _has_column(db, "monitored_servers", "api_key"):
             db.execute(text("ALTER TABLE monitored_servers ADD COLUMN api_key VARCHAR(64) NULL"))
diff --git a/app/models/models.py b/app/models/models.py
index b790154..8e05ca1 100644
--- a/app/models/models.py
+++ b/app/models/models.py
@@ -72,6 +72,7 @@ class User(Base):
     email = Column(String(100), unique=True, nullable=False)
     hashed_password = Column(String(255), nullable=True)
     full_name = Column(String(100), nullable=True)
+    discord_user_id = Column(String(32), nullable=True)
     is_active = Column(Boolean, default=True)
     is_admin = Column(Boolean, default=False)
     role_id = Column(Integer, ForeignKey("roles.id"), nullable=True)
diff --git a/app/schemas/schemas.py b/app/schemas/schemas.py
index ef8e8e1..cec1e59 100644
--- a/app/schemas/schemas.py
+++ b/app/schemas/schemas.py
@@ -171,6 +171,7 @@ class UserBase(BaseModel):
 class UserCreate(UserBase):
     password: Optional[str] = None
     role_id: Optional[int] = None
+    discord_user_id: Optional[str] = None
     # Agent binding (both must be provided or both omitted)
     agent_id: Optional[str] = None
     claw_identifier: Optional[str] = None
@@ -182,6 +183,7 @@ class UserUpdate(BaseModel):
     password: Optional[str] = None
     role_id: Optional[int] = None
     is_active: Optional[bool] = None
+    discord_user_id: Optional[str] = None
 
 
 class UserResponse(UserBase):
@@ -191,6 +193,7 @@ class UserResponse(UserBase):
     role_id: Optional[int] = None
     role_name: Optional[str] = None
     agent_id: Optional[str] = None
+    discord_user_id: Optional[str] = None
     created_at: datetime
     
     class Config: