POST
/
user
/
sms
Send SMS
curl --request POST \
  --url https://app.autocalls.ai/api/user/sms \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "from": 123,
  "to": "<string>",
  "body": "<string>"
}'
{
  "message": "SMS sent successfully",
  "data": {
    "id": 456,
    "phone_number_id": 78,
    "to": "+1234567890",
    "body": "Hello! This is a test message from Your Company. How can we help you today?",
    "user_id": 1,
    "segments": 1,
    "segment_price": 0.0075,
    "total_cost": 0.0075,
    "status": "sent",
    "sms_sid": "SM1234567890abcdef1234567890abcdef",
    "created_at": "2025-08-04 15:30:00",
    "updated_at": "2025-08-04 15:30:02"
  }
}
This endpoint allows you to send SMS messages using your purchased phone numbers. The SMS will be sent via Twilio and costs will be automatically deducted from your account balance.

​
Request Body

​
from
integer
required
The ID of your phone number to send the SMS from (must be SMS-capable)
​
to
string
required
The recipient’s phone number in international format (e.g., “+1234567890”)
​
body
string
required
The SMS message content (max 300 characters)

​
Response

​
message
string
Success message confirming SMS was sent
​
data
object

​
Error Responses

​
400 Bad Request
​
500 Internal Server Error
{
  "message": "SMS sent successfully",
  "data": {
    "id": 456,
    "phone_number_id": 78,
    "to": "+1234567890",
    "body": "Hello! This is a test message from Your Company. How can we help you today?",
    "user_id": 1,
    "segments": 1,
    "segment_price": 0.0075,
    "total_cost": 0.0075,
    "status": "sent",
    "sms_sid": "SM1234567890abcdef1234567890abcdef",
    "created_at": "2025-08-04 15:30:00",
    "updated_at": "2025-08-04 15:30:02"
  }
}

​
Notes

  • The sender phone number must belong to the authenticated user
  • The sender phone number must be SMS-capable
  • The phone number subscription must be active (not expired)
  • Sufficient account balance is required to cover SMS costs
  • Phone numbers are automatically formatted to E.164 format
  • SMS costs vary by destination country and are charged per segment
  • Long messages may be split into multiple segments, increasing the cost
  • The recipient phone number must be valid according to international standards