Changelog
Changes to the Heizen API, newest first.
2026-10-01
The first public version of the Heizen API.
- REST endpoints for interviewers, candidates, invitations, sessions, results, imports, exports, webhook endpoints and events.
- Test mode (
hz_test_keys) that never uses credits. - Webhooks signed in the Standard Webhooks format, with retries over 21 hours.
- Idempotency keys on every creating endpoint, and a 600-requests-a-minute rate limit per key.
- Cancelled interviews report session status
cancelled(invitation statuscanceled), and sessions and exports can filter on it. expires_aton invitation create and bulk invite sets when a link stops working.- The
@heizen/interviewerTypeScript SDK.