Pingdom - With website monitoring from Pingdom you will be the first to know when your website is down. No installation required. 30-day free trial.
Face++ - API for face detection – also detects gender, age, pose
StatusCake - Website Uptime Monitoring & Alerts – Free Unlimited Downtime Monitoring
TrueFace.AI - A facial recognition API with picture attack detection
Better Uptime - We call you when your website goes down
Knoto - Send photos to friends automatically using face recognition