v4
latestOpenAPI 3.1.02026-07-3163216290.7 KBWebhooks
Email opened
Sent when a campaign or workflow email is opened. Not available for transactional emails because email opens are not tracked for transactional emails. Contains sourceType and the related campaignId or loopId (workflow ID), plus contactIdentity and email objects.
postWebhookemailOpened
Headers
webhook-idstring required
Unique message ID. Use to deduplicate deliveries.
webhook-timestampstring required
Unix timestamp of when the message was sent.
webhook-signaturestring required
HMAC signature for verifying the request. Verify using your endpoint signing secret from the Loops dashboard.
Payload
Response
Webhook received successfully. Return any 2xx status code to acknowledge delivery.