{"service":"WhatsApp Business API — Meta Cloud","version":"1.0.0","engine":"Meta Graph API oficial","status":"running","webhook":{"verify":"GET  /api/webhook  ← URL que configuras en Meta Developers","receive":"POST /api/webhook  ← Meta envía eventos aquí"},"endpoints":{"status":"GET  /api/status","send":"POST /api/send","sendImage":"POST /api/send-image","sendDocument":"POST /api/send-document","sendAudio":"POST /api/send-audio","sendVideo":"POST /api/send-video","sendTemplate":"POST /api/send-template","sendButtons":"POST /api/send-buttons","sendBulk":"POST /api/send-bulk"},"auth":"Header: x-api-key: <tu_api_key>"}