Bulk replay from the delivery timeline

Until today, replaying failed deliveries meant clicking through them one at a time — fine for a blip, miserable after an incident. The delivery timeline now has checkboxes. Filter by endpoint, status, and time range, select up to 500 deliveries, and hit Replay selected. Deliveries are re-sent in their original order, and every replay carries the same idempotency key as the first attempt so a consumer that already processed an event can safely drop the duplicate.

The same operation is available from the CLI, which is where most of you will want it after a long outage window:

relaycast replay --endpoint checkout-live \
  --status failed \
  --since 2026-08-25T00:00:00Z

Replays respect each endpoint’s rate limit and run through the normal retry pipeline, so a replay can never stampede an endpoint that is still recovering. A progress panel shows sent, acknowledged, and failed counts as the batch drains, and an Abort button stops the remainder instantly.

Every bulk replay is recorded in the audit log with who started it, the filter that selected the deliveries, and the final counts — useful when you are writing the post-incident review an hour later.