4.8TLS days until expiry (API only)

Type: tls.days_until_expiry. Checks: the number of whole days left on the site's TLS certificate. A TLS certificate is what makes an https:// address secure. Part days round down: 23 hours and 59 minutes left counts as 0 days. If the address redirects, it is the certificate of the final response.

It works on URL, API and multi-step API monitors. You add it through the API. The dashboard does not offer it, but keeps it when you edit the monitor.

Operators: usually gt. Also lt, eq, neq.

Type	Operator	Value	What it means
`tls.days_until_expiry`	gt	`30`	Down when 30 days or fewer are left.
`tls.days_until_expiry`	gt	`14`	Down when 14 days or fewer are left.

TLS days in an API request

json

{"type": "tls.days_until_expiry",
 "op": "ASSERTION_OP_GT", "value": "14"}

When it fails: assertion tls.days_until_expiry > 14: got 9. On a plain http:// address you see assertion tls.days_until_expiry: no TLS connection (HTTP request?).