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POST
https://app.autocalls.ai/api/
/
user
/
whatsapp
/
send
curl -X POST "https://app.autocalls.ai/api/user/whatsapp/send" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "sender_id": 12,
    "template_id": 45,
    "recipient_phone": "+1234567890",
    "recipient_name": "John Doe",
    "variables": {
      "1": "John",
      "2": "January 15, 2026",
      "3": "2:00 PM"
    }
  }'

{
  "success": true,
  "conversation_id": 1234,
  "message_id": 567,
  "whatsapp_message_id": 890,
  "message_sid": "SMxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
  "status": "queued"
}
This endpoint sends a WhatsApp message using a pre-approved template. Template messages are required when initiating a conversation with a user for the first time or when messaging outside the 24-hour messaging window.
This endpoint is rate-limited to 5 requests per second per user.

​
Request Body

​
sender_id
integer
required
The ID of the WhatsApp sender to send from (obtained from the Get Senders endpoint)
​
template_id
integer
required
The ID of the message template to use (obtained from the Get Templates endpoint)
​
recipient_phone
string
required
The recipient’s phone number in international format (e.g., +1234567890)
​
recipient_name
string
The recipient’s name, max 255 characters (used for conversation tracking and CRM purposes)
​
variables
object
Key-value pairs for template variables. Keys should match the variable names from the template. If the template has variables {{1}}, {{2}}, etc., provide them as {"1": "value1", "2": "value2"} or using the named keys from the template’s variables array.

​
Response Fields

​
success
boolean
Whether the message was sent successfully
​
conversation_id
integer
The ID of the conversation (new or existing) associated with this message
​
message_id
integer
The ID of the conversation message record
​
whatsapp_message_id
integer
The ID of the WhatsApp message record
​
message_sid
string
The Twilio message SID for tracking delivery
​
status
string
The initial message delivery status (e.g., queued, sent)

​
Error Responses

​
402 Insufficient Balance
​
404 Not Found
​
422 Unprocessable Entity
curl -X POST "https://app.autocalls.ai/api/user/whatsapp/send" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "sender_id": 12,
    "template_id": 45,
    "recipient_phone": "+1234567890",
    "recipient_name": "John Doe",
    "variables": {
      "1": "John",
      "2": "January 15, 2026",
      "3": "2:00 PM"
    }
  }'

{
  "success": true,
  "conversation_id": 1234,
  "message_id": 567,
  "whatsapp_message_id": 890,
  "message_sid": "SMxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx",
  "status": "queued"
}

​
Notes

  • Template messages must use approved templates. Templates with pending or rejected status will fail.
  • The sender must be online. Offline senders cannot send messages.
  • Message costs are automatically deducted from your account balance (credits for tenant users, minutes for direct users).
  • After sending a template message, a 24-hour messaging window opens. During this window, you can send freeform messages without needing a template.
  • If a conversation already exists with the recipient, the message is added to the existing conversation.
  • Rate limit: 5 requests per second per user.