{"message":"Telegram DM Backend API","version":"2.2.0","description":"Enhanced system with database-backed duplicate prevention and ultra-safe delays","endpoints":{"GET /api/accounts/uploaded":"List available uploaded accounts","POST /api/accounts/test":"Test account connection","GET /api/accounts/stats/:account_name":"Get account statistics","GET /api/accounts/warmness/:account_name":"Get account warmness information","GET /api/accounts/warmest?min_warmness=50":"Get warmest available account","GET /api/invites/recent-contacts/:channel_name?days=30":"Get recently contacted users for duplicate prevention","GET /api/invites/stats?channel_name=&account_name=":"Get invite statistics from database","POST /api/send-invites/uploaded":"Send invite messages using uploaded account","POST /api/send-invites/warmed":"Send invites using automatically selected warmed account","POST /api/send-invites/rotated":"Send invites with automatic account rotation on rate limits"}}