POST
/sms/sendSend a single SMS message to a phone number.
| Name | Type | Required | Description |
|---|---|---|---|
to | string | required | Recipient phone number (E.164 or local format). |
message | string | required | SMS body text. Max 160 chars for single segment. |
sender_name | string | optional | Sender ID shown on the recipient's device. |
schedule_at | string | optional | ISO 8601 datetime to schedule the message. |