Send an SMS message

Sends an SMS message to a contact. Only the contact ID and message are required — the recipient phone, sender phone, and SMS provider are automatically resolved from the contact and playbook configuration. The recipient defaults to the contact phone on file. The sender is resolved from the playbook assigned phone number, then the SMS agent phone, then the first SMS-capable number. The provider follows the playbook-level override, then the tenant default, then Vonage. If an interactionId is provided, the message is appended to an existing conversation. Otherwise, the system finds or creates a conversation automatically.

package mainimport (  "fmt"  "net/http"  "io/ioutil"  "strings")func main() {  url := "https://api.vayaflow.com/api/v1/sms/send"  body := strings.NewReader(`{    "contactId": "contact_abc123",    "message": "Hi John, just following up on your inquiry."  }`)  req, _ := http.NewRequest("POST", url, body)  req.Header.Add("Content-Type", "application/json")  res, _ := http.DefaultClient.Do(req)  defer res.Body.Close()  body, _ := ioutil.ReadAll(res.Body)  fmt.Println(res)  fmt.Println(string(body))}

{
  "success": true,
  "data": {
    "messageId": "msg_abc123",
    "status": "sent",
    "interactionId": "int_abc123"
  }
}

{
  "success": false,
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid input data",
    "details": [
      "string"
    ]
  }
}

{
  "success": false,
  "error": {
    "code": "UNAUTHORIZED",
    "message": "Authentication required"
  }
}

{
  "success": false,
  "error": {
    "code": "NOT_FOUND",
    "message": "Resource not found"
  }
}