OptionalbodyOptionalcallback_Override the default callback URL for this batch. Constraints: Must be valid URL.
Optionalclient_The client identifier of a batch message. If set, the identifier will be added in the delivery report/callback of this batch.
Optionaldelivery_Request delivery report callback. Note that delivery reports can be fetched from the API regardless of this setting.
Optionalexpire_If set, the system will stop trying to deliver the message at this point.
Must be after send_at. Default and max is 3 days after send_at. Formatted as ISO-8601. For example: YYYY-MM-DDThh:mm:ss.SSSZ.
Optionalfeedback_If set to true then feedback is expected after successful delivery.
OptionalfromSender number. Must be valid phone number, short code or alphanumeric.
Optionalfrom_Number Plan Indicator for the sender number. Use to override the automatic detection.
Optionalfrom_The type of number for the sender number. Use to override the automatic detection.
Optionalsend_If set, in the future the message will be delayed until send_at occurs. Formatted as ISO-8601: YYYY-MM-DDThh:mm:ss.SSSZ. Constraints: Must be before expire_at. If set in the past, messages will be sent immediately.
Optionalto_List of phone numbers and group IDs to add to the batch.
Optionalto_List of phone numbers and group IDs to remove from the batch.
OptionaltypeSMS in binary format.
OptionaludhThe UDH header of a binary message HEX encoded. Max 140 bytes together with body.
The message content Base64 encoded. Max 140 bytes together with udh.