Reference

What's in this section

Reference pages are the source of truth for shapes, names, and exhaustive lists. They are intentionally dry; if you want narrative, see Concepts or Tutorials.

• REST API: authentication, shared conventions, and commonly automated endpoints.
• Webhooks: outbound payloads, headers, signature verification.
• Limits & quotas: per-capability numerical limits (monitors, heartbeats, status pages).
• Email delivery & unsubscribe: critical vs. non-critical mail, one-click unsubscribe, bounce/complaint suppression.

Reference content rarely changes. When it does, the page header carries a "Last updated" stamp so you can confirm freshness at a glance.