Monibot is a hosted monitoring service for websites, servers and applications. It checks websites over HTTP and flags slow responses and SSL certificates that are about to expire, receives heartbeats from cron jobs, systemd timers and scheduled tasks, collects CPU, memory, disk and network figures through a lightweight server agent, and accepts custom metrics through a REST API. Alerts are sent by email, through the push services Pushover and ntfy, or by webhook.
Monibot states that it is made and hosted in Germany. Its privacy policy names the German companies Hetzner Online GmbH and united-domains AG as hosting providers, and lists Simple Analytics (Netherlands), Stripe (Ireland), Pushover and ntfy as further third parties. The service is delivered as SaaS only. A separate command-line client for the REST API is published on GitHub under the MIT licence, but the service itself is not described as open source. The site does not name the operating company, so check the imprint and privacy policy for the legal entity.