Realtime Event Engine

Delivery Lifecycle

Current lifecycle states and retry sequence for webhook delivery attempts.

Status flow: pending -> retrying -> delivered or dead_letter.

Retry backoff: 2s, 10s, 60s.

Attempts: 4 total (initial attempt + 3 retries), with no jitter.

Retry trigger: all non-2xx outcomes are retried (4xx, 5xx, timeout, and connection errors) until attempts are exhausted.

Use event_id and correlation_id for end-to-end tracing.

No public replay endpoint is currently available for dead-letter events.