What it is
ntfy is the private notification endpoint for the homelab. It gives local services a simple place to publish alert messages without sending every internal event directly to a public SaaS endpoint.
Why I run it
Healthchecks and future scheduled jobs need a delivery path that can be tested, locked down, and reused. ntfy is small enough to be boring and flexible enough to become the "send a local alert" primitive.
How I use it
Healthchecks publishes to the homelab-alerts topic with a dedicated token. Anonymous publish is denied, and the phone subscription remains a deliberate device setup step before I rely on mobile delivery.