Send a test event
send posts to the endpoint’s public URL, the same one a provider posts to, so the event takes the same path through ingest, the endpoint’s criteria and mappings, and delivery as any other. The answer says where it was routed. --endpoint takes an endpoint’s readable base slug, its ID, its name, or a full workspace/project/slug path.
Find what arrived, and what failed
--since takes a duration (30m, 2h, 7d) or a timestamp.
Replay a bad window
--yes.
Each event is replayed once per destination. Replaying a replay works (the server resolves it to the original record), so the CLI sends one replay for each event and destination, however many failed attempts it had, and skips deliveries that are still being retried automatically. It says how many it skipped and why. An event past your plan’s retention can’t be replayed; the server answers
409.429, the run stops there rather than piling on.