Schedule or send an email
Send a draft now or schedule it up to a year ahead, to lists or one segment.
POST https://cotlet.dev/api/v1/constant-contact/emails/{email_id}
write Confirm
Sets the audience and the time of an email, like the Schedule page. Give list_ids or one segment_id; leave send_at out to send now. send_at is a date and time with an offset, in the future and within a year. Sending needs an Account Owner or Account Manager login, and can take up to 30 minutes on a large list. resend_to_non_openers is not available with a subject line A/B test and on some plans. By default you confirm each call; you can switch that off for this tool.
Parameters
| Name | Type | Description |
|---|---|---|
| email_id string required | string | Email ID from list_emails. |
| list_ids array | array | IDs of the lists to send to. Use this or segment_id. |
| segment_id integer | integer | Send to this segment. Use this or list_ids. |
| send_at datetime | datetime | ISO 8601 date and time with offset. Leave out to send now. |
| resend_to_non_openers boolean | boolean | Also resend to contacts who did not open it. Default: false. |
Request
curl -X POST https://cotlet.dev/api/v1/constant-contact/emails/7b1e9c30-4d2a-4f86-9a15-c3e8d0b72f41 \
-H "Authorization: Bearer $COTLET_API_KEY" \
-H "Content-Type: application/json" \
-d '{"list_ids":["5a8d3f21-6b9c-4e07-8d14-2f7c9e0a1b36"],"send_at":"2026-11-03T09:00:00+01:00"}'result = client.call("constant-contact", "send_email", {"email_id":"7b1e9c30-4d2a-4f86-9a15-c3e8d0b72f41","list_ids":["5a8d3f21-6b9c-4e07-8d14-2f7c9e0a1b36"],"send_at":"2026-11-03T09:00:00+01:00"})const result = await cotlet.call('constant-contact', 'send_email', {"email_id":"7b1e9c30-4d2a-4f86-9a15-c3e8d0b72f41","list_ids":["5a8d3f21-6b9c-4e07-8d14-2f7c9e0a1b36"],"send_at":"2026-11-03T09:00:00+01:00"});cotlet call constant-contact send_email --data '{"email_id":"7b1e9c30-4d2a-4f86-9a15-c3e8d0b72f41","list_ids":["5a8d3f21-6b9c-4e07-8d14-2f7c9e0a1b36"],"send_at":"2026-11-03T09:00:00+01:00"}'Example response
{
"email_id": "7b1e9c30-4d2a-4f86-9a15-c3e8d0b72f41",
"status": "scheduled",
"scheduled_for": "2026-11-03T08:00:00Z",
"audience": "Tenants"
}