Campaigns

Send a campaign now

Immediately dispatches a draft campaign. The campaign must be a draft with a subject, sender email, and content. Sending is asynchronous; the campaign transitions to preparing. Requires the campaigns:write scope. Not available to sandbox keys.

post/campaigns/{campaignId}/send

Request

  • Base URL: https://app.lettr.com/api
  • URL: https://app.lettr.com/api/campaigns/{campaignId}/send
  • Auth: HTTP bearer

Path parameters

campaignIdstring uuid required

Campaign ID

Response

Campaign sending started.

messagestring required

Example response

{
  "message": "Campaign scheduled for delivery.",
  "data": {
    "id": "0193e6a8-1f3a-7c2a-b9e2-1aa1d2e5d3f0",
    "name": "Spring Sale",
    "status": "sent",
    "sent_count": 124,
    "created_at": "2026-05-01T09:00:00+00:00"
  }
}

Changes

No recorded changes to this operation across all 1 revision of this API.