Automated SSL Certificate Expiry Notification

This n8n workflow automates the process of monitoring the SSL certificate status of a domain and sending an alert if it has expired. The workflow begins with a manual trigger, allowing users to initiate the check on demand. It then creates a domain item containing the domain name (e.g., ‘n8n.io’) using a Function Item node. The domain name is dynamically passed to the ‘Get SSL Certificate’ node, which retrieves the current SSL certificate details via a specified API credential. The workflow includes a conditional ‘If’ node to evaluate whether the SSL certificate is valid. If the certificate has expired (i.e., is not valid), the workflow triggers a Telegram message alerting a specified chat about the expired certificate. This setup is useful for website administrators or DevOps teams who need to proactively monitor SSL certificate health and avoid security risks or downtime due to expired certificates.