OS.ST SSL Service (Annual Subscription)

OS.ST SSL Service is sold as an annual subscription per hosted domain. Under the hood runs a fully automated certificate lifecycle pipeline: scheduled ACME (acme.sh) renewal; a watchdog rebuilds HAProxy certificates in three tiers — mtime cache, content compare, then install and reload only on real change, gated by haproxy -c. The domain list is self-derived from the HAProxy config, so there is no second list to maintain. os.st clients integrate through a client API to check and manage their own domains' certificates; an on-demand sync API lives in our control panel.