diff --git a/backend/alembic/versions/0007_plugins.py b/backend/alembic/versions/0007_plugins.py
new file mode 100644
index 0000000..a1605ae
--- /dev/null
+++ b/backend/alembic/versions/0007_plugins.py
@@ -0,0 +1,29 @@
+"""0007 plugins registry
+
+Revision ID: 0007
+Revises: 0006
+Create Date: 2026-04-07
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+revision = "0007"
+down_revision = "0006"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "plugins",
+        sa.Column("name", sa.String(100), primary_key=True),
+        sa.Column("display_name", sa.String(255), nullable=False),
+        sa.Column("description", sa.Text(), nullable=True),
+        sa.Column("enabled", sa.Boolean(), nullable=False, server_default="true"),
+        sa.Column("registered_at", sa.DateTime(timezone=True), nullable=False),
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("plugins")
diff --git a/backend/app/main.py b/backend/app/main.py
index bae006d..e833f85 100644
--- a/backend/app/main.py
+++ b/backend/app/main.py
@@ -6,14 +6,14 @@ from fastapi.openapi.utils import get_openapi
 
 from app.middleware.auth import AuthMiddleware
 from app.plugins.loader import load_plugins
-from app.routers import alerts, auth, devices, events, objects, racks, snapshots, tags, tasks, zones
+from app.routers import admin, alerts, auth, devices, events, objects, racks, snapshots, tags, tasks, zones
 from app.workers.monitor import start_monitor, stop_monitor
 from app.workers.startup import recover_stale_tasks
 
 
 @asynccontextmanager
 async def lifespan(app: FastAPI):
-    load_plugins()
+    await load_plugins()
     await recover_stale_tasks()
     start_monitor()
     yield
@@ -45,6 +45,7 @@ def create_app() -> FastAPI:
     app.include_router(racks.router)
     app.include_router(zones.router)
     app.include_router(tags.router)
+    app.include_router(admin.router)
     app.include_router(alerts.router)
     app.include_router(snapshots.router)
     app.include_router(tasks.router)
diff --git a/backend/app/models/plugin.py b/backend/app/models/plugin.py
new file mode 100644
index 0000000..d761f1c
--- /dev/null
+++ b/backend/app/models/plugin.py
@@ -0,0 +1,19 @@
+from datetime import datetime
+from typing import Optional
+
+from sqlalchemy import Boolean, DateTime, String, Text
+from sqlalchemy.orm import Mapped, mapped_column
+
+from .base import Base
+
+
+class Plugin(Base):
+    """Registry of known action plugins with enable/disable control."""
+
+    __tablename__ = "plugins"
+
+    name: Mapped[str] = mapped_column(String(100), primary_key=True)
+    display_name: Mapped[str] = mapped_column(String(255), nullable=False)
+    description: Mapped[Optional[str]] = mapped_column(Text(), nullable=True)
+    enabled: Mapped[bool] = mapped_column(Boolean(), nullable=False, default=True)
+    registered_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
diff --git a/backend/app/plugins/loader.py b/backend/app/plugins/loader.py
index 77a40d4..9f527f8 100644
--- a/backend/app/plugins/loader.py
+++ b/backend/app/plugins/loader.py
@@ -1,10 +1,23 @@
 """
-PluginLoader — discovers and registers action plugins at startup.
+PluginLoader — registers action plugins at startup and syncs them with the DB.
 
-Étape 3: builtins include SSH file snapshots, Mikrotik, and Camera plugins.
-Étape 5: will scan plugins/custom/ and cross-reference with the plugins DB table.
+Startup flow:
+  1. For each builtin action, INSERT into `plugins` table (skip if already exists).
+     This preserves the `enabled` flag set by admins.
+  2. Load the list of enabled plugin names from DB.
+  3. Register only enabled actions in the registry.
+
+Hot enable/disable (via Admin API):
+  - Disable: set DB.enabled=False, call action_registry.unregister(name)
+  - Enable:  set DB.enabled=True,  call action_registry.register(BUILTIN_ACTIONS[name])
 """
 
+from datetime import datetime, timezone
+
+from sqlalchemy import select
+from sqlalchemy.dialects.postgresql import insert as pg_insert
+
+from app.models.plugin import Plugin
 from app.plugins.base import BaseAction
 from app.plugins.builtin.camera.get_status import CameraGetStatusAction
 from app.plugins.builtin.camera.set_ntp import CameraSetNTPAction
@@ -16,24 +29,52 @@ from app.plugins.builtin.ssh.get_file import GetFileAction
 from app.plugins.builtin.ssh.get_timedatectl import GetTimedatectlAction
 from app.plugins.builtin.ssh.ssh_command import SSHCommandAction
 from app.plugins.registry import action_registry
+from app.services.database import AsyncSessionLocal
 
-_BUILTIN_ACTIONS: list[BaseAction] = [
-    # Universal
-    PingAction(),
-    # SSH / Linux
-    SSHCommandAction(),
-    GetTimedatectlAction(),
-    GetFileAction(),
-    # Mikrotik (RouterOS via SSH)
-    MikrotikGetConfigAction(),
-    MikrotikGetNTPAction(),
-    MikrotikSetNTPAction(),
-    # Cameras (Hikvision ISAPI)
-    CameraGetStatusAction(),
-    CameraSetNTPAction(),
-]
+# Public dict — used by Admin router for hot enable/disable
+BUILTIN_ACTIONS: dict[str, BaseAction] = {
+    a.name: a
+    for a in [
+        PingAction(),
+        SSHCommandAction(),
+        GetTimedatectlAction(),
+        GetFileAction(),
+        MikrotikGetConfigAction(),
+        MikrotikGetNTPAction(),
+        MikrotikSetNTPAction(),
+        CameraGetStatusAction(),
+        CameraSetNTPAction(),
+    ]
+}
 
 
-def load_plugins() -> None:
-    for action in _BUILTIN_ACTIONS:
-        action_registry.register(action)
+async def load_plugins() -> None:
+    now = datetime.now(timezone.utc)
+
+    async with AsyncSessionLocal() as db:
+        async with db.begin():
+            for action in BUILTIN_ACTIONS.values():
+                stmt = (
+                    pg_insert(Plugin)
+                    .values(
+                        name=action.name,
+                        display_name=action.display_name,
+                        description=(action.__class__.__doc__ or "").strip() or None,
+                        enabled=True,
+                        registered_at=now,
+                    )
+                    .on_conflict_do_nothing(index_elements=["name"])
+                )
+                await db.execute(stmt)
+
+    # Load enabled plugins from DB
+    async with AsyncSessionLocal() as db:
+        result = await db.execute(select(Plugin.name).where(Plugin.enabled == True))
+        enabled_names = {row[0] for row in result.all()}
+
+    # Register only enabled actions
+    for name, action in BUILTIN_ACTIONS.items():
+        if name in enabled_names:
+            action_registry.register(action)
+
+    print(f"[plugins] Registered {len(enabled_names)}/{len(BUILTIN_ACTIONS)} plugin(s)")
diff --git a/backend/app/plugins/registry.py b/backend/app/plugins/registry.py
index bf8c80f..c4e3d6c 100644
--- a/backend/app/plugins/registry.py
+++ b/backend/app/plugins/registry.py
@@ -14,6 +14,9 @@ class ActionRegistry:
     def all(self) -> list[BaseAction]:
         return list(self._actions.values())
 
+    def unregister(self, name: str) -> None:
+        self._actions.pop(name, None)
+
     def for_category(self, category: str) -> list[BaseAction]:
         return [a for a in self._actions.values() if a.is_compatible(category)]
 
diff --git a/backend/app/routers/admin.py b/backend/app/routers/admin.py
new file mode 100644
index 0000000..2aeb28c
--- /dev/null
+++ b/backend/app/routers/admin.py
@@ -0,0 +1,160 @@
+"""
+Admin router — plugin management and user CRUD.
+All endpoints require admin role.
+"""
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.dependencies import get_db, require_admin
+from app.models.plugin import Plugin
+from app.models.user import User
+from app.plugins.loader import BUILTIN_ACTIONS
+from app.plugins.registry import action_registry
+from app.schemas.admin import PluginRead, PluginUpdate, UserCreate, UserRead, UserUpdate
+from app.services.auth import hash_password
+
+router = APIRouter(prefix="/api/v1/admin", tags=["admin"])
+
+
+# ── Plugins ────────────────────────────────────────────────────────────────────
+
+@router.get("/plugins", response_model=list[PluginRead])
+async def list_plugins(
+    db: AsyncSession = Depends(get_db),
+    _: User = Depends(require_admin),
+):
+    result = await db.execute(select(Plugin).order_by(Plugin.name))
+    plugins = result.scalars().all()
+
+    out = []
+    for p in plugins:
+        action = BUILTIN_ACTIONS.get(p.name)
+        out.append(
+            PluginRead(
+                name=p.name,
+                display_name=p.display_name,
+                description=p.description,
+                enabled=p.enabled,
+                registered_at=p.registered_at,
+                compatible_categories=action.compatible_categories if action else [],
+            )
+        )
+    return out
+
+
+@router.patch("/plugins/{name}", response_model=PluginRead)
+async def update_plugin(
+    name: str,
+    body: PluginUpdate,
+    db: AsyncSession = Depends(get_db),
+    _: User = Depends(require_admin),
+):
+    plugin = await db.get(Plugin, name)
+    if plugin is None:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Plugin not found")
+
+    plugin.enabled = body.enabled
+
+    # Hot-reload the registry immediately
+    if body.enabled:
+        action = BUILTIN_ACTIONS.get(name)
+        if action:
+            action_registry.register(action)
+    else:
+        action_registry.unregister(name)
+
+    await db.flush()
+    action = BUILTIN_ACTIONS.get(name)
+    return PluginRead(
+        name=plugin.name,
+        display_name=plugin.display_name,
+        description=plugin.description,
+        enabled=plugin.enabled,
+        registered_at=plugin.registered_at,
+        compatible_categories=action.compatible_categories if action else [],
+    )
+
+
+# ── Users ──────────────────────────────────────────────────────────────────────
+
+@router.get("/users", response_model=list[UserRead])
+async def list_users(
+    db: AsyncSession = Depends(get_db),
+    _: User = Depends(require_admin),
+):
+    result = await db.execute(select(User).order_by(User.username))
+    return result.scalars().all()
+
+
+@router.post("/users", response_model=UserRead, status_code=status.HTTP_201_CREATED)
+async def create_user(
+    body: UserCreate,
+    db: AsyncSession = Depends(get_db),
+    _: User = Depends(require_admin),
+):
+    # Check username uniqueness
+    existing = await db.execute(select(User).where(User.username == body.username))
+    if existing.scalar_one_or_none() is not None:
+        raise HTTPException(
+            status_code=status.HTTP_409_CONFLICT,
+            detail=f"Username '{body.username}' is already taken",
+        )
+
+    user = User(
+        username=body.username,
+        email=body.email,
+        full_name=body.full_name,
+        password_hash=hash_password(body.password),
+        role=body.role,
+        is_active=True,
+    )
+    db.add(user)
+    await db.flush()
+    await db.refresh(user)
+    return user
+
+
+@router.patch("/users/{user_id}", response_model=UserRead)
+async def update_user(
+    user_id: int,
+    body: UserUpdate,
+    db: AsyncSession = Depends(get_db),
+    current_admin: User = Depends(require_admin),
+):
+    user = await db.get(User, user_id)
+    if user is None:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="User not found")
+
+    if body.email is not None:
+        user.email = body.email
+    if body.full_name is not None:
+        user.full_name = body.full_name
+    if body.role is not None:
+        user.role = body.role
+    if body.is_active is not None:
+        user.is_active = body.is_active
+    if body.password:
+        user.password_hash = hash_password(body.password)
+
+    await db.flush()
+    await db.refresh(user)
+    return user
+
+
+@router.delete("/users/{user_id}", status_code=status.HTTP_204_NO_CONTENT)
+async def delete_user(
+    user_id: int,
+    db: AsyncSession = Depends(get_db),
+    current_admin: User = Depends(require_admin),
+):
+    if user_id == current_admin.id:
+        raise HTTPException(
+            status_code=status.HTTP_400_BAD_REQUEST,
+            detail="Cannot delete your own account",
+        )
+    user = await db.get(User, user_id)
+    if user is None:
+        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="User not found")
+    await db.delete(user)
diff --git a/backend/app/routers/auth.py b/backend/app/routers/auth.py
index 8234f1c..580f6bf 100644
--- a/backend/app/routers/auth.py
+++ b/backend/app/routers/auth.py
@@ -21,7 +21,12 @@ async def login(body: LoginRequest, request: Request, db: AsyncSession = Depends
         ip_address=request.client.host if request.client else None,
         user_agent=request.headers.get("User-Agent"),
     )
-    return TokenResponse(access_token=access_token, refresh_token=refresh_token)
+    return TokenResponse(
+        access_token=access_token,
+        refresh_token=refresh_token,
+        username=user.username,
+        role=user.role,
+    )
 
 
 @router.post("/refresh", response_model=TokenResponse)
@@ -36,7 +41,12 @@ async def refresh(body: RefreshRequest, request: Request, db: AsyncSession = Dep
 
     user, new_refresh_token = result
     access_token = auth_service.create_access_token(user.id)
-    return TokenResponse(access_token=access_token, refresh_token=new_refresh_token)
+    return TokenResponse(
+        access_token=access_token,
+        refresh_token=new_refresh_token,
+        username=user.username,
+        role=user.role,
+    )
 
 
 @router.post("/logout", status_code=status.HTTP_204_NO_CONTENT)
diff --git a/backend/app/routers/objects.py b/backend/app/routers/objects.py
index c1421a4..a011552 100644
--- a/backend/app/routers/objects.py
+++ b/backend/app/routers/objects.py
@@ -8,9 +8,11 @@ from app.models.device import Device
 from app.models.object import Object
 from app.models.tag import Tag
 from app.models.user import User
+from app.schemas.admin import SheetsSyncRequest
 from app.schemas.object import ObjectCreate, ObjectRead, ObjectUpdate, SyncResult
 from app.services import crypto
 from app.services.object_db import sync_from_object_db
+from app.services.sheets import sync_from_sheets
 
 router = APIRouter(prefix="/api/v1/objects", tags=["objects"])
 
@@ -136,3 +138,28 @@ async def sync_devices(
         skipped=result.skipped,
         errors=result.errors,
     )
+
+
+@router.post("/{obj_id}/sync/sheets", response_model=SyncResult)
+async def sync_devices_from_sheets(
+    obj_id: int,
+    body: SheetsSyncRequest,
+    db: AsyncSession = Depends(get_db),
+    _: User = Depends(get_current_user),
+):
+    await _load_object(db, obj_id)
+    try:
+        result = await sync_from_sheets(
+            db,
+            object_id=obj_id,
+            spreadsheet_id=body.spreadsheet_id,
+            sheet_name=body.sheet_name,
+        )
+    except ValueError as exc:
+        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=str(exc))
+    return SyncResult(
+        created=result.created,
+        updated=result.updated,
+        skipped=result.skipped,
+        errors=result.errors,
+    )
diff --git a/backend/app/schemas/admin.py b/backend/app/schemas/admin.py
new file mode 100644
index 0000000..007ffb5
--- /dev/null
+++ b/backend/app/schemas/admin.py
@@ -0,0 +1,58 @@
+from datetime import datetime
+from typing import Optional
+
+from pydantic import BaseModel, ConfigDict
+
+
+# ── Plugins ────────────────────────────────────────────────────────────────────
+
+class PluginRead(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    name: str
+    display_name: str
+    description: Optional[str]
+    enabled: bool
+    registered_at: datetime
+    compatible_categories: list[str] = []
+
+
+class PluginUpdate(BaseModel):
+    enabled: bool
+
+
+# ── Users ──────────────────────────────────────────────────────────────────────
+
+class UserRead(BaseModel):
+    model_config = ConfigDict(from_attributes=True)
+
+    id: int
+    username: str
+    email: Optional[str]
+    full_name: Optional[str]
+    role: str
+    is_active: bool
+    created_at: datetime
+
+
+class UserCreate(BaseModel):
+    username: str
+    password: str
+    email: Optional[str] = None
+    full_name: Optional[str] = None
+    role: str = "operator"  # "admin" | "operator"
+
+
+class UserUpdate(BaseModel):
+    email: Optional[str] = None
+    full_name: Optional[str] = None
+    role: Optional[str] = None
+    is_active: Optional[bool] = None
+    password: Optional[str] = None  # if set, hashes and updates
+
+
+# ── Google Sheets sync ─────────────────────────────────────────────────────────
+
+class SheetsSyncRequest(BaseModel):
+    spreadsheet_id: str
+    sheet_name: Optional[str] = None  # defaults to first sheet
diff --git a/backend/app/schemas/auth.py b/backend/app/schemas/auth.py
index 143044f..a01370f 100644
--- a/backend/app/schemas/auth.py
+++ b/backend/app/schemas/auth.py
@@ -10,6 +10,8 @@ class TokenResponse(BaseModel):
     access_token: str
     refresh_token: str
     token_type: str = "bearer"
+    username: str = ""
+    role: str = "operator"
 
 
 class RefreshRequest(BaseModel):
diff --git a/backend/app/services/sheets.py b/backend/app/services/sheets.py
new file mode 100644
index 0000000..6b5753d
--- /dev/null
+++ b/backend/app/services/sheets.py
@@ -0,0 +1,165 @@
+"""
+Google Sheets sync service.
+
+Reads device rows from a Google Spreadsheet and upserts them into the devices table.
+Column mapping (case-insensitive): ip, hostname, category, role, model, mac, notes.
+
+Prerequisites:
+  - Set GOOGLE_SERVICE_ACCOUNT_JSON env var with a service account JSON key.
+  - Share the target spreadsheet with the service account email (read-only is enough).
+
+gspread is synchronous; calls are wrapped in run_in_executor to avoid blocking.
+"""
+
+import asyncio
+import functools
+import json
+import os
+from dataclasses import dataclass, field
+from typing import Optional
+
+from sqlalchemy import select
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from app.models.device import Device
+
+try:
+    import gspread
+    from google.oauth2.service_account import Credentials as ServiceAccountCredentials
+
+    _GSPREAD_AVAILABLE = True
+except ImportError:
+    _GSPREAD_AVAILABLE = False
+
+_SCOPES = [
+    "https://spreadsheets.google.com/feeds",
+    "https://www.googleapis.com/auth/drive.readonly",
+]
+
+# Supported column names (lowercase) → Device field
+_COLUMN_MAP = {
+    "ip": "ip",
+    "hostname": "hostname",
+    "category": "category",
+    "role": "role",
+    "model": "model",
+    "mac": "mac",
+    "notes": "notes",
+}
+
+_VALID_CATEGORIES = {"raspberry", "mikrotik", "camera", "embedded", "server", "other"}
+
+
+@dataclass
+class SheetsSyncResult:
+    created: int = 0
+    updated: int = 0
+    skipped: int = 0
+    errors: list[str] = field(default_factory=list)
+
+
+def _get_gspread_client():
+    if not _GSPREAD_AVAILABLE:
+        raise ValueError(
+            "gspread is not installed. Add 'gspread' to project dependencies."
+        )
+
+    creds_raw = os.environ.get("GOOGLE_SERVICE_ACCOUNT_JSON")
+    if not creds_raw:
+        raise ValueError(
+            "GOOGLE_SERVICE_ACCOUNT_JSON environment variable is not set. "
+            "Provide a service account JSON key to enable Google Sheets sync."
+        )
+
+    creds_data = json.loads(creds_raw)
+    creds = ServiceAccountCredentials.from_service_account_info(creds_data, scopes=_SCOPES)
+    return gspread.authorize(creds)
+
+
+def _fetch_rows_sync(spreadsheet_id: str, sheet_name: Optional[str]) -> list[dict]:
+    """Synchronous fetch — runs in executor."""
+    client = _get_gspread_client()
+    sh = client.open_by_key(spreadsheet_id)
+    ws = sh.worksheet(sheet_name) if sheet_name else sh.sheet1
+    return ws.get_all_records()  # list of dicts keyed by header row
+
+
+async def fetch_rows(spreadsheet_id: str, sheet_name: Optional[str]) -> list[dict]:
+    loop = asyncio.get_event_loop()
+    return await loop.run_in_executor(
+        None,
+        functools.partial(_fetch_rows_sync, spreadsheet_id, sheet_name),
+    )
+
+
+def _normalize_row(raw: dict) -> dict:
+    """Lowercase keys, strip values."""
+    return {k.lower().strip(): str(v).strip() for k, v in raw.items() if v != ""}
+
+
+async def sync_from_sheets(
+    db: AsyncSession,
+    object_id: int,
+    spreadsheet_id: str,
+    sheet_name: Optional[str] = None,
+) -> SheetsSyncResult:
+    result = SheetsSyncResult()
+
+    # 1. Fetch rows from Google Sheets (blocking I/O in executor)
+    try:
+        raw_rows = await fetch_rows(spreadsheet_id, sheet_name)
+    except Exception as exc:
+        result.errors.append(f"Failed to read spreadsheet: {exc}")
+        return result
+
+    # 2. Load existing devices for this object (keyed by ip)
+    existing_result = await db.execute(
+        select(Device).where(Device.object_id == object_id)
+    )
+    existing: dict[str, Device] = {d.ip: d for d in existing_result.scalars().all()}
+
+    for i, raw in enumerate(raw_rows, start=2):  # row 2 = first data row (after header)
+        row = _normalize_row(raw)
+        ip = row.get("ip", "").strip()
+
+        if not ip:
+            result.errors.append(f"Row {i}: missing 'ip' column — skipped")
+            result.skipped += 1
+            continue
+
+        category = row.get("category", "other")
+        if category not in _VALID_CATEGORIES:
+            category = "other"
+
+        if ip in existing:
+            dev = existing[ip]
+            changed = False
+            for col, field_name in _COLUMN_MAP.items():
+                if col in row and col != "ip":
+                    new_val = row[col] or None
+                    if getattr(dev, field_name) != new_val:
+                        setattr(dev, field_name, new_val)
+                        changed = True
+            dev.source = "sheets_sync"
+            if changed:
+                result.updated += 1
+            else:
+                result.skipped += 1
+        else:
+            dev = Device(
+                object_id=object_id,
+                ip=ip,
+                hostname=row.get("hostname") or None,
+                category=category,
+                role=row.get("role", "other"),
+                model=row.get("model") or None,
+                mac=row.get("mac") or None,
+                notes=row.get("notes") or None,
+                source="sheets_sync",
+                status="unknown",
+            )
+            db.add(dev)
+            existing[ip] = dev
+            result.created += 1
+
+    return result
diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 219dc8e..6207f71 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -18,6 +18,9 @@ dependencies = [
     "python-multipart>=0.0.20",
     "httpx>=0.28",
     "asyncssh>=2.18",
+    # Google Sheets sync (optional — requires GOOGLE_SERVICE_ACCOUNT_JSON env var)
+    "gspread>=6.0",
+    "google-auth>=2.0",
 ]
 
 [project.optional-dependencies]
diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index 43550cb..6b45927 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -1,5 +1,6 @@
 import { Navigate, Route, Routes } from 'react-router-dom'
 import { AppLayout } from './components/AppLayout'
+import { AdminPage } from './pages/Admin'
 import { AlertsPage } from './pages/Alerts'
 import { LoginPage } from './pages/Login'
 import { ObjectDetailPage } from './pages/ObjectDetail'
@@ -27,6 +28,7 @@ export default function App() {
         }
       >
         <Route index element={<Navigate to="/objects" replace />} />
+        <Route path="admin" element={<AdminPage />} />
         <Route path="alerts" element={<AlertsPage />} />
         <Route path="objects" element={<ObjectsPage />} />
         <Route path="objects/:id" element={<ObjectDetailPage />} />
diff --git a/frontend/src/api/admin.ts b/frontend/src/api/admin.ts
new file mode 100644
index 0000000..f5401e6
--- /dev/null
+++ b/frontend/src/api/admin.ts
@@ -0,0 +1,88 @@
+import { useMutation, useQuery, useQueryClient } from '@tanstack/react-query'
+import { api } from './client'
+
+// ── Plugins ───────────────────────────────────────────────────────────────────
+
+export interface PluginItem {
+  name: string
+  display_name: string
+  description: string | null
+  enabled: boolean
+  registered_at: string
+  compatible_categories: string[]
+}
+
+export const usePlugins = () =>
+  useQuery({
+    queryKey: ['admin-plugins'],
+    queryFn: () => api.get<PluginItem[]>('/api/v1/admin/plugins').then((r) => r.data),
+  })
+
+export const useUpdatePlugin = () => {
+  const qc = useQueryClient()
+  return useMutation({
+    mutationFn: ({ name, enabled }: { name: string; enabled: boolean }) =>
+      api.patch<PluginItem>(`/api/v1/admin/plugins/${name}`, { enabled }).then((r) => r.data),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['admin-plugins'] }),
+  })
+}
+
+// ── Users ─────────────────────────────────────────────────────────────────────
+
+export interface UserItem {
+  id: number
+  username: string
+  email: string | null
+  full_name: string | null
+  role: string
+  is_active: boolean
+  created_at: string
+}
+
+export interface UserCreatePayload {
+  username: string
+  password: string
+  email?: string
+  full_name?: string
+  role?: string
+}
+
+export interface UserUpdatePayload {
+  email?: string
+  full_name?: string
+  role?: string
+  is_active?: boolean
+  password?: string
+}
+
+export const useAdminUsers = () =>
+  useQuery({
+    queryKey: ['admin-users'],
+    queryFn: () => api.get<UserItem[]>('/api/v1/admin/users').then((r) => r.data),
+  })
+
+export const useCreateAdminUser = () => {
+  const qc = useQueryClient()
+  return useMutation({
+    mutationFn: (body: UserCreatePayload) =>
+      api.post<UserItem>('/api/v1/admin/users', body).then((r) => r.data),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['admin-users'] }),
+  })
+}
+
+export const useUpdateAdminUser = () => {
+  const qc = useQueryClient()
+  return useMutation({
+    mutationFn: ({ id, body }: { id: number; body: UserUpdatePayload }) =>
+      api.patch<UserItem>(`/api/v1/admin/users/${id}`, body).then((r) => r.data),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['admin-users'] }),
+  })
+}
+
+export const useDeleteAdminUser = () => {
+  const qc = useQueryClient()
+  return useMutation({
+    mutationFn: (id: number) => api.delete(`/api/v1/admin/users/${id}`),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['admin-users'] }),
+  })
+}
diff --git a/frontend/src/api/objects.ts b/frontend/src/api/objects.ts
index aec2a4a..b2ac56f 100644
--- a/frontend/src/api/objects.ts
+++ b/frontend/src/api/objects.ts
@@ -194,3 +194,17 @@ export const useSyncObject = (objId: number) => {
     onSuccess: () => qc.invalidateQueries({ queryKey: ['devices', objId] }),
   })
 }
+
+export interface SheetsSyncPayload {
+  spreadsheet_id: string
+  sheet_name?: string
+}
+
+export const useSyncSheets = (objId: number) => {
+  const qc = useQueryClient()
+  return useMutation({
+    mutationFn: (body: SheetsSyncPayload) =>
+      api.post<SyncResult>(`/api/v1/objects/${objId}/sync/sheets`, body).then((r) => r.data),
+    onSuccess: () => qc.invalidateQueries({ queryKey: ['devices', objId] }),
+  })
+}
diff --git a/frontend/src/components/AppLayout.tsx b/frontend/src/components/AppLayout.tsx
index 22847ed..578a1a3 100644
--- a/frontend/src/components/AppLayout.tsx
+++ b/frontend/src/components/AppLayout.tsx
@@ -2,6 +2,7 @@ import {
   ApartmentOutlined,
   BellOutlined,
   LogoutOutlined,
+  SettingOutlined,
   ThunderboltOutlined,
 } from '@ant-design/icons'
 import { Badge, Layout, Menu, Typography } from 'antd'
@@ -18,7 +19,7 @@ export function AppLayout() {
   const navigate = useNavigate()
   const location = useLocation()
   const qc = useQueryClient()
-  const { username, refreshToken, clearTokens } = useAuthStore()
+  const { username, role, refreshToken, clearTokens } = useAuthStore()
 
   // Open alert count for sidebar badge — refresh every 60s
   const { data: openAlerts } = useAlerts({
@@ -42,6 +43,8 @@ export function AppLayout() {
     ? 'tasks'
     : location.pathname.startsWith('/alerts')
     ? 'alerts'
+    : location.pathname.startsWith('/admin')
+    ? 'admin'
     : 'objects'
 
   const handleLogout = async () => {
@@ -91,6 +94,16 @@ export function AppLayout() {
               label: 'Задачи',
               onClick: () => navigate('/tasks'),
             },
+            ...(role === 'admin'
+              ? [
+                  {
+                    key: 'admin',
+                    icon: <SettingOutlined />,
+                    label: 'Администрирование',
+                    onClick: () => navigate('/admin'),
+                  },
+                ]
+              : []),
           ]}
         />
         <div style={{ position: 'absolute', bottom: 16, left: 0, right: 0, padding: '0 24px' }}>
diff --git a/frontend/src/pages/Admin.tsx b/frontend/src/pages/Admin.tsx
new file mode 100644
index 0000000..8e06b30
--- /dev/null
+++ b/frontend/src/pages/Admin.tsx
@@ -0,0 +1,323 @@
+import {
+  DeleteOutlined,
+  EditOutlined,
+  PlusOutlined,
+  UserOutlined,
+  ApiOutlined,
+} from '@ant-design/icons'
+import {
+  Badge,
+  Breadcrumb,
+  Button,
+  Col,
+  Divider,
+  Form,
+  Input,
+  Modal,
+  Popconfirm,
+  Row,
+  Select,
+  Space,
+  Switch,
+  Table,
+  Tag,
+  Tabs,
+  Typography,
+  message,
+} from 'antd'
+import { useState } from 'react'
+import {
+  useAdminUsers,
+  useCreateAdminUser,
+  useDeleteAdminUser,
+  usePlugins,
+  useUpdateAdminUser,
+  useUpdatePlugin,
+  type UserItem,
+} from '../api/admin'
+import { stripEmpty } from '../utils/form'
+
+// ── Plugins Tab ───────────────────────────────────────────────────────────────
+function PluginsTab() {
+  const { data: plugins, isLoading } = usePlugins()
+  const updatePlugin = useUpdatePlugin()
+
+  const toggle = async (name: string, enabled: boolean) => {
+    try {
+      await updatePlugin.mutateAsync({ name, enabled })
+      message.success(enabled ? `Плагин «${name}» включён` : `Плагин «${name}» отключён`)
+    } catch {
+      message.error('Ошибка при обновлении плагина')
+    }
+  }
+
+  const columns = [
+    {
+      title: 'Название',
+      key: 'display_name',
+      render: (_: unknown, row: (typeof plugins)[0]) => (
+        <Space direction="vertical" size={0}>
+          <Typography.Text strong>{row.display_name}</Typography.Text>
+          <Typography.Text type="secondary" style={{ fontSize: 12 }}>
+            {row.name}
+          </Typography.Text>
+        </Space>
+      ),
+    },
+    {
+      title: 'Описание',
+      dataIndex: 'description',
+      key: 'description',
+      render: (v: string | null) => v ?? '—',
+    },
+    {
+      title: 'Категории',
+      dataIndex: 'compatible_categories',
+      key: 'categories',
+      render: (cats: string[]) =>
+        cats.length === 0 ? (
+          <Tag color="default">Все</Tag>
+        ) : (
+          cats.map((c) => <Tag key={c}>{c}</Tag>)
+        ),
+    },
+    {
+      title: 'Статус',
+      key: 'enabled',
+      width: 100,
+      render: (_: unknown, row: (typeof plugins)[0]) => (
+        <Switch
+          checked={row.enabled}
+          onChange={(val) => toggle(row.name, val)}
+          loading={updatePlugin.isPending}
+          checkedChildren="Вкл"
+          unCheckedChildren="Откл"
+        />
+      ),
+    },
+  ]
+
+  return (
+    <Table
+      dataSource={plugins ?? []}
+      columns={columns}
+      rowKey="name"
+      loading={isLoading}
+      size="middle"
+      pagination={false}
+    />
+  )
+}
+
+// ── Users Tab ─────────────────────────────────────────────────────────────────
+function UsersTab() {
+  const { data: users, isLoading } = useAdminUsers()
+  const createUser = useCreateAdminUser()
+  const updateUser = useUpdateAdminUser()
+  const deleteUser = useDeleteAdminUser()
+
+  const [createModal, setCreateModal] = useState(false)
+  const [editTarget, setEditTarget] = useState<UserItem | null>(null)
+  const [form] = Form.useForm()
+
+  const openCreate = () => {
+    form.resetFields()
+    setEditTarget(null)
+    setCreateModal(true)
+  }
+
+  const openEdit = (user: UserItem) => {
+    form.resetFields()
+    form.setFieldsValue({
+      email: user.email ?? '',
+      full_name: user.full_name ?? '',
+      role: user.role,
+      is_active: user.is_active,
+    })
+    setEditTarget(user)
+    setCreateModal(true)
+  }
+
+  const handleSave = async () => {
+    const values = await form.validateFields()
+    const payload = stripEmpty(values)
+    try {
+      if (editTarget) {
+        await updateUser.mutateAsync({ id: editTarget.id, body: payload as any })
+        message.success('Пользователь обновлён')
+      } else {
+        await createUser.mutateAsync(payload as any)
+        message.success('Пользователь создан')
+      }
+      setCreateModal(false)
+      setEditTarget(null)
+    } catch (err: any) {
+      const detail = err?.response?.data?.detail
+      message.error(detail ?? 'Ошибка при сохранении')
+    }
+  }
+
+  const handleDelete = async (id: number) => {
+    try {
+      await deleteUser.mutateAsync(id)
+      message.success('Пользователь удалён')
+    } catch (err: any) {
+      message.error(err?.response?.data?.detail ?? 'Ошибка при удалении')
+    }
+  }
+
+  const columns = [
+    {
+      title: 'Логин',
+      dataIndex: 'username',
+      key: 'username',
+      render: (v: string) => <Typography.Text strong>{v}</Typography.Text>,
+    },
+    { title: 'Email', dataIndex: 'email', key: 'email', render: (v: string | null) => v ?? '—' },
+    {
+      title: 'Роль',
+      dataIndex: 'role',
+      key: 'role',
+      render: (v: string) => (
+        <Tag color={v === 'admin' ? 'red' : 'blue'}>{v}</Tag>
+      ),
+    },
+    {
+      title: 'Статус',
+      dataIndex: 'is_active',
+      key: 'is_active',
+      render: (v: boolean) =>
+        v ? <Badge status="success" text="Активен" /> : <Badge status="default" text="Неактивен" />,
+    },
+    {
+      title: '',
+      key: 'actions',
+      width: 100,
+      render: (_: unknown, row: UserItem) => (
+        <Space>
+          <Button size="small" icon={<EditOutlined />} onClick={() => openEdit(row)} />
+          <Popconfirm
+            title="Удалить пользователя?"
+            okText="Удалить"
+            cancelText="Отмена"
+            okButtonProps={{ danger: true }}
+            onConfirm={() => handleDelete(row.id)}
+          >
+            <Button size="small" danger icon={<DeleteOutlined />} />
+          </Popconfirm>
+        </Space>
+      ),
+    },
+  ]
+
+  return (
+    <>
+      <div style={{ marginBottom: 16, textAlign: 'right' }}>
+        <Button type="primary" icon={<PlusOutlined />} onClick={openCreate}>
+          Создать пользователя
+        </Button>
+      </div>
+
+      <Table
+        dataSource={users ?? []}
+        columns={columns}
+        rowKey="id"
+        loading={isLoading}
+        size="middle"
+        pagination={false}
+      />
+
+      <Modal
+        title={editTarget ? `Редактировать: ${editTarget.username}` : 'Создать пользователя'}
+        open={createModal}
+        onCancel={() => { setCreateModal(false); setEditTarget(null) }}
+        onOk={handleSave}
+        confirmLoading={createUser.isPending || updateUser.isPending}
+        okText={editTarget ? 'Сохранить' : 'Создать'}
+      >
+        <Form form={form} layout="vertical" style={{ marginTop: 16 }}>
+          {!editTarget && (
+            <>
+              <Form.Item name="username" label="Логин" rules={[{ required: true }]}>
+                <Input />
+              </Form.Item>
+              <Form.Item name="password" label="Пароль" rules={[{ required: true }]}>
+                <Input.Password />
+              </Form.Item>
+            </>
+          )}
+          {editTarget && (
+            <Form.Item name="password" label="Новый пароль (оставьте пустым для сохранения)">
+              <Input.Password />
+            </Form.Item>
+          )}
+          <Row gutter={12}>
+            <Col span={12}>
+              <Form.Item name="email" label="Email">
+                <Input />
+              </Form.Item>
+            </Col>
+            <Col span={12}>
+              <Form.Item name="full_name" label="Полное имя">
+                <Input />
+              </Form.Item>
+            </Col>
+          </Row>
+          <Row gutter={12}>
+            <Col span={12}>
+              <Form.Item name="role" label="Роль" initialValue="operator">
+                <Select options={[
+                  { value: 'admin', label: 'Администратор' },
+                  { value: 'operator', label: 'Оператор' },
+                ]} />
+              </Form.Item>
+            </Col>
+            {editTarget && (
+              <Col span={12}>
+                <Form.Item name="is_active" label="Статус" valuePropName="checked">
+                  <Switch checkedChildren="Активен" unCheckedChildren="Неактивен" />
+                </Form.Item>
+              </Col>
+            )}
+          </Row>
+        </Form>
+      </Modal>
+    </>
+  )
+}
+
+// ── Main Page ─────────────────────────────────────────────────────────────────
+export function AdminPage() {
+  return (
+    <div>
+      <Breadcrumb style={{ marginBottom: 16 }} items={[{ title: 'Администрирование' }]} />
+      <Typography.Title level={4} style={{ marginBottom: 16 }}>
+        Администрирование
+      </Typography.Title>
+
+      <Tabs
+        defaultActiveKey="plugins"
+        items={[
+          {
+            key: 'plugins',
+            label: (
+              <span>
+                <ApiOutlined /> Плагины
+              </span>
+            ),
+            children: <PluginsTab />,
+          },
+          {
+            key: 'users',
+            label: (
+              <span>
+                <UserOutlined /> Пользователи
+              </span>
+            ),
+            children: <UsersTab />,
+          },
+        ]}
+      />
+    </div>
+  )
+}
diff --git a/frontend/src/pages/Login.tsx b/frontend/src/pages/Login.tsx
index 7b9248e..f2319dc 100644
--- a/frontend/src/pages/Login.tsx
+++ b/frontend/src/pages/Login.tsx
@@ -16,7 +16,7 @@ export function LoginPage() {
     setError(null)
     try {
       const { data } = await api.post('/api/v1/auth/login', values)
-      setTokens(data.access_token, data.refresh_token, values.username)
+      setTokens(data.access_token, data.refresh_token, data.username || values.username, data.role || 'operator')
       navigate('/objects')
     } catch {
       setError('Неверный логин или пароль')
diff --git a/frontend/src/pages/ObjectDetail.tsx b/frontend/src/pages/ObjectDetail.tsx
index d577e86..14f8ce3 100644
--- a/frontend/src/pages/ObjectDetail.tsx
+++ b/frontend/src/pages/ObjectDetail.tsx
@@ -2,6 +2,7 @@ import {
   DeleteOutlined,
   EditOutlined,
   FileTextOutlined,
+  GoogleOutlined,
   PlayCircleOutlined,
   PlusOutlined,
   SyncOutlined,
@@ -44,6 +45,7 @@ import {
   useObject,
   usePreviewCSV,
   useSyncObject,
+  useSyncSheets,
   type DeviceImportPreview,
   type DeviceItem,
 } from '../api/objects'
@@ -64,6 +66,7 @@ export function ObjectDetailPage() {
   const { data: racks } = useRacks(objId)
   const { data: zones } = useZones(objId)
   const syncMutation = useSyncObject(objId)
+  const syncSheetsMutation = useSyncSheets(objId)
   const { data: actions } = useActions()
   const createTask = useCreateTask()
   const createDevice = useCreateDevice(objId)
@@ -81,6 +84,7 @@ export function ObjectDetailPage() {
   const [editDevice, setEditDevice] = useState<DeviceItem | null>(null)
   const [csvModal, setCsvModal] = useState(false)
   const [rackModal, setRackModal] = useState(false)
+  const [sheetsModal, setSheetsModal] = useState(false)
   const [csvFile, setCsvFile] = useState<File | null>(null)
   const [csvPreview, setCsvPreview] = useState<DeviceImportPreview | null>(null)
   const [searchText, setSearchText] = useState('')
@@ -89,6 +93,7 @@ export function ObjectDetailPage() {
   const [deviceForm] = Form.useForm()
   const [rackForm] = Form.useForm()
   const [zoneForm] = Form.useForm()
+  const [sheetsForm] = Form.useForm()
   const [selectedAction, setSelectedAction] = useState<string>('')
 
   const currentAction = actions?.find((a) => a.name === selectedAction)
@@ -130,6 +135,23 @@ export function ObjectDetailPage() {
     }
   }
 
+  const handleSyncSheets = async () => {
+    try {
+      const values = await sheetsForm.validateFields()
+      const result = await syncSheetsMutation.mutateAsync({
+        spreadsheet_id: values.spreadsheet_id,
+        sheet_name: values.sheet_name || undefined,
+      })
+      message.success(`Google Sheets: +${result.created} создано, ${result.updated} обновлено`)
+      setSheetsModal(false)
+      sheetsForm.resetFields()
+    } catch (err: any) {
+      const detail = err?.response?.data?.detail
+      if (detail) message.error(detail)
+      // validation errors are shown inline — no extra message needed
+    }
+  }
+
   const openAddDevice = () => {
     deviceForm.resetFields()
     setEditDevice(null)
@@ -473,6 +495,9 @@ export function ObjectDetailPage() {
             <Button icon={<UploadOutlined />} onClick={() => setCsvModal(true)}>
               Импорт CSV
             </Button>
+            <Button icon={<GoogleOutlined />} onClick={() => setSheetsModal(true)}>
+              Google Sheets
+            </Button>
             <Button icon={<PlusOutlined />} onClick={openAddDevice}>
               Добавить устройство
             </Button>
@@ -788,6 +813,37 @@ export function ObjectDetailPage() {
         </Form>
       </Modal>
 
+      {/* ── Google Sheets Sync Modal ── */}
+      <Modal
+        title="Синхронизация из Google Sheets"
+        open={sheetsModal}
+        onCancel={() => { setSheetsModal(false); sheetsForm.resetFields() }}
+        onOk={handleSyncSheets}
+        confirmLoading={syncSheetsMutation.isPending}
+        okText="Синхронизировать"
+      >
+        <Form form={sheetsForm} layout="vertical" style={{ marginTop: 16 }}>
+          <Form.Item
+            name="spreadsheet_id"
+            label="ID таблицы Google Sheets"
+            rules={[{ required: true, message: 'Введите ID таблицы' }]}
+            extra="Часть URL после /spreadsheets/d/ и перед /edit"
+          >
+            <Input placeholder="1BxiMVs0XRA5nFMdKvBdBZjgmUUqptlbs74OgVE2upms" />
+          </Form.Item>
+          <Form.Item
+            name="sheet_name"
+            label="Название листа (необязательно)"
+            extra="По умолчанию используется первый лист"
+          >
+            <Input placeholder="Sheet1" />
+          </Form.Item>
+        </Form>
+        <Typography.Text type="secondary" style={{ fontSize: 12 }}>
+          Ожидаемые столбцы: ip, hostname, category, role, model, mac, notes
+        </Typography.Text>
+      </Modal>
+
       {/* ── Task Modal ── */}
       <Modal
         title="Создать задачу"
diff --git a/frontend/src/store/auth.ts b/frontend/src/store/auth.ts
index 5876ff9..dc7d0f7 100644
--- a/frontend/src/store/auth.ts
+++ b/frontend/src/store/auth.ts
@@ -5,7 +5,8 @@ interface AuthState {
   accessToken: string | null
   refreshToken: string | null
   username: string | null
-  setTokens: (access: string, refresh: string, username: string) => void
+  role: string | null
+  setTokens: (access: string, refresh: string, username: string, role: string) => void
   clearTokens: () => void
 }
 
@@ -15,10 +16,11 @@ export const useAuthStore = create<AuthState>()(
       accessToken: null,
       refreshToken: null,
       username: null,
-      setTokens: (access, refresh, username) =>
-        set({ accessToken: access, refreshToken: refresh, username }),
+      role: null,
+      setTokens: (access, refresh, username, role) =>
+        set({ accessToken: access, refreshToken: refresh, username, role }),
       clearTokens: () =>
-        set({ accessToken: null, refreshToken: null, username: null }),
+        set({ accessToken: null, refreshToken: null, username: null, role: null }),
     }),
     { name: 'fleet-auth' }
   )