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Webhook deliveries and replay

COPE delivers webhooks at least once. Your integration should treat every delivery as retryable and idempotent.

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Replay behavior

• Deduplicate by the event id before applying side effects: a retry or a replay repeats it.
• Replay commands should be sent with an idempotency key when a replay API route is available.
• Bulk replay is represented as a replay job rather than a synchronous loop.
• Bulk replay returns no_matching_deliveries when the selected window has no failed deliveries to replay.

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Test events

Use test events to verify endpoint reachability, signature verification, and idempotent processing before subscribing to production event traffic. A test event arrives in the same envelope as a production delivery.