Are there usage limits?

**Are there usage limits?**

✅ YES — Certain enforces usage limits for both its API and platform features.

Short answer

- API: 20 concurrent connections (exceeding returns HTTP 429; retry after ~2s and use exponential backoff).

Source: [Certain API 2.0 Developer Documentation](https://developer.certain.com/api2docs/developer)

- Platform/account: event capacity and inventory limits exist (attendee types, sessions, room blocks, event capacity). You can configure threshold notification emails (one notification per setting until you “reset” the alert system) and view account usage (events, billable registrations, imports).

Sources: [Account Usage](https://platform-support.certain.com/hc/en-us/articles/30505062433431), [Notification Setup](https://platform-support.certain.com/hc/en-us/articles/30570708998295), [Email Alerts](https://platform-support.certain.com/hc/en-us/articles/200210450-Email-Alerts)

Details / recommended actions

- For API integrations: limit concurrent requests to ≤20, implement retries with exponential backoff, queue requests, and add monitoring to avoid 429 errors. If you need more concurrency, contact your Customer Success Manager. ([Developer doc](https://developer.certain.com/api2docs/developer))

- For event/platform limits: configure notification thresholds, use the Reset option to re-enable notifications for new thresholds, and review Account Usage reports to track events/registrations/imports. (See links above.)

Which limits are you asking about — API rate limits for integrations or event/platform capacity and notifications?