Daily Vercel domain health check in Slack

Every morning at 8am in my local timezone, run an agent that audits every domain in my Vercel account and alerts me in Slack if anything is at risk of taking a site offline. Trigger is cron, once per day.

Step 1: Use Vercel's List Domains to fetch the full inventory of domains on the account. Page through if there are more than fit in one response.

Step 2: For each domain, call Vercel's Get Domain to read its expiration date, verification status, auto-renew setting, nameserver configuration, and whether the registrar is Vercel or external.

Step 3: Categorize every domain into one of three buckets. Critical: expiring within 14 days, OR not verified, OR nameservers are misconfigured (intended Vercel nameservers but pointing elsewhere, or vice versa). Warning: expiring within 30 days, OR auto-renew is turned off on a Vercel-registered domain. Healthy: everything else. For externally registered domains the expiration date may be unknown, so only the verification and nameserver checks apply to those.

Step 4: If any domains are in the critical or warning buckets, use Slack Bot's Send a Message to post a single message into the #ops channel (let me pick the exact channel when I set this up). Group the message by bucket with critical first, then warning. For each domain include the domain name, what is wrong in plain English, a one-line remediation (renew the registration, turn auto-renew back on, update the nameservers at the registrar, re-add the TXT record to verify, etc.), and a direct link to that domain's Vercel settings page in the format https://vercel.com/[team-slug]/domains/[domain].

Step 5: If every domain is healthy, do not post anything. Staying silent on good days is intentional so the channel does not become noise.

Use the Slack Bot integration for the alert (acts as a bot, posts into the channel). The Vercel List Domains and Get Domain operations are the only Vercel calls needed.