Open rates are not always accurate. Learn more about why open rates may not
be accurate.
email.opened
Received when an email is opened.
Event triggered whenever the recipient opened the email.
Documentation Index
Fetch the complete documentation index at: /docs/llms.txt
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{
"type": "email.opened",
"created_at": "2026-02-22T23:41:12.126Z",
"data": {
"broadcast_id": "8b146471-e88e-4322-86af-016cd36fd216",
"created_at": "2026-02-22T23:41:11.894Z",
"email_id": "56761188-7520-42d8-8898-ff6fc54ce618",
"message_id": "<111-222-333@email.example.com>",
"from": "Acme <onboarding@resend.dev>",
"to": ["delivered@resend.dev"],
"subject": "Sending this example",
"template_id": "43f68331-0622-4e15-8202-246a0388854b",
"tags": {
"category": "confirm_email"
}
}
}
Received when an email is opened.
{
"type": "email.opened",
"created_at": "2026-02-22T23:41:12.126Z",
"data": {
"broadcast_id": "8b146471-e88e-4322-86af-016cd36fd216",
"created_at": "2026-02-22T23:41:11.894Z",
"email_id": "56761188-7520-42d8-8898-ff6fc54ce618",
"message_id": "<111-222-333@email.example.com>",
"from": "Acme <onboarding@resend.dev>",
"to": ["delivered@resend.dev"],
"subject": "Sending this example",
"template_id": "43f68331-0622-4e15-8202-246a0388854b",
"tags": {
"category": "confirm_email"
}
}
}
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