Cancel a scheduled message
Cancels a single queued message for a contact. Get the message ID from List scheduled messages. The message is removed and never sent. Returns {"cancelled": 0} when the message is not queued (already sent, already cancelled, or not found).
Authentication
api-keystring
Your Atlas API key. Get it from the Atlas Portal under Settings > API Keys.
Path parameters
campaignId
contactIdentifier
Contact phone number (E.164) or Apple ID email, URL-encoded (+ becomes %2B).
messageId
The message ID.
Response
Messages cancelled
cancelled
Number of queued messages that were cancelled.
Errors
400
Bad Request Error
500
Internal Server Error