Send a WhatsApp message

curl --request POST \
  --url https://api.wavix.com/v1/whatsapp/messages \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "from": "+14155550100",
  "to": "+447537151866",
  "idempotency_key": "order-1001-shipped",
  "template": {
    "name": "order_shipped",
    "language": "en_US",
    "placeholders": [
      "Maria",
      "#1001"
    ]
  }
}
'

import requests

url = "https://api.wavix.com/v1/whatsapp/messages"

payload = {
    "from": "+14155550100",
    "to": "+447537151866",
    "idempotency_key": "order-1001-shipped",
    "template": {
        "name": "order_shipped",
        "language": "en_US",
        "placeholders": ["Maria", "#1001"]
    }
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    from: '+14155550100',
    to: '+447537151866',
    idempotency_key: 'order-1001-shipped',
    template: {name: 'order_shipped', language: 'en_US', placeholders: ['Maria', '#1001']}
  })
};

fetch('https://api.wavix.com/v1/whatsapp/messages', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.wavix.com/v1/whatsapp/messages",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'from' => '+14155550100',
    'to' => '+447537151866',
    'idempotency_key' => 'order-1001-shipped',
    'template' => [
        'name' => 'order_shipped',
        'language' => 'en_US',
        'placeholders' => [
                'Maria',
                '#1001'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.wavix.com/v1/whatsapp/messages"

	payload := strings.NewReader("{\n  \"from\": \"+14155550100\",\n  \"to\": \"+447537151866\",\n  \"idempotency_key\": \"order-1001-shipped\",\n  \"template\": {\n    \"name\": \"order_shipped\",\n    \"language\": \"en_US\",\n    \"placeholders\": [\n      \"Maria\",\n      \"#1001\"\n    ]\n  }\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.wavix.com/v1/whatsapp/messages")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"from\": \"+14155550100\",\n  \"to\": \"+447537151866\",\n  \"idempotency_key\": \"order-1001-shipped\",\n  \"template\": {\n    \"name\": \"order_shipped\",\n    \"language\": \"en_US\",\n    \"placeholders\": [\n      \"Maria\",\n      \"#1001\"\n    ]\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.wavix.com/v1/whatsapp/messages")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"from\": \"+14155550100\",\n  \"to\": \"+447537151866\",\n  \"idempotency_key\": \"order-1001-shipped\",\n  \"template\": {\n    \"name\": \"order_shipped\",\n    \"language\": \"en_US\",\n    \"placeholders\": [\n      \"Maria\",\n      \"#1001\"\n    ]\n  }\n}"

response = http.request(request)
puts response.read_body

{
  "message": {
    "uuid": "3a525ca2-6909-4c72-9399-905adf7f3a74",
    "from": "+14155550100",
    "to": "+447537151866",
    "status": "delivered",
    "template": {
      "name": "order_shipped",
      "language": "en_US"
    },
    "created_at": "2026-01-15T10:30:00.123Z"
  }
}

Send a WhatsApp message

Sends a WhatsApp template message from one of your registered senders to a recipient, and returns the message with its ID.

The API sends only template messages, so every send names one of your templates.

Behavior: Returns 201 with the new message. Poll whatsapp_messages_get for the delivery outcome. A repeat send with the same idempotency_key returns 200 with the original message and sends nothing.

Requires: Your account must have WhatsApp and its sending capability enabled, must have a subscription plan, and must not be blocked or suspended. from must be a sender registered on your account.

POST

messages

Send a WhatsApp message

curl --request POST \
  --url https://api.wavix.com/v1/whatsapp/messages \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "from": "+14155550100",
  "to": "+447537151866",
  "idempotency_key": "order-1001-shipped",
  "template": {
    "name": "order_shipped",
    "language": "en_US",
    "placeholders": [
      "Maria",
      "#1001"
    ]
  }
}
'

import requests

url = "https://api.wavix.com/v1/whatsapp/messages"

payload = {
    "from": "+14155550100",
    "to": "+447537151866",
    "idempotency_key": "order-1001-shipped",
    "template": {
        "name": "order_shipped",
        "language": "en_US",
        "placeholders": ["Maria", "#1001"]
    }
}
headers = {
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({
    from: '+14155550100',
    to: '+447537151866',
    idempotency_key: 'order-1001-shipped',
    template: {name: 'order_shipped', language: 'en_US', placeholders: ['Maria', '#1001']}
  })
};

fetch('https://api.wavix.com/v1/whatsapp/messages', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.wavix.com/v1/whatsapp/messages",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'from' => '+14155550100',
    'to' => '+447537151866',
    'idempotency_key' => 'order-1001-shipped',
    'template' => [
        'name' => 'order_shipped',
        'language' => 'en_US',
        'placeholders' => [
                'Maria',
                '#1001'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Bearer <token>",
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.wavix.com/v1/whatsapp/messages"

	payload := strings.NewReader("{\n  \"from\": \"+14155550100\",\n  \"to\": \"+447537151866\",\n  \"idempotency_key\": \"order-1001-shipped\",\n  \"template\": {\n    \"name\": \"order_shipped\",\n    \"language\": \"en_US\",\n    \"placeholders\": [\n      \"Maria\",\n      \"#1001\"\n    ]\n  }\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.wavix.com/v1/whatsapp/messages")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"from\": \"+14155550100\",\n  \"to\": \"+447537151866\",\n  \"idempotency_key\": \"order-1001-shipped\",\n  \"template\": {\n    \"name\": \"order_shipped\",\n    \"language\": \"en_US\",\n    \"placeholders\": [\n      \"Maria\",\n      \"#1001\"\n    ]\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.wavix.com/v1/whatsapp/messages")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"from\": \"+14155550100\",\n  \"to\": \"+447537151866\",\n  \"idempotency_key\": \"order-1001-shipped\",\n  \"template\": {\n    \"name\": \"order_shipped\",\n    \"language\": \"en_US\",\n    \"placeholders\": [\n      \"Maria\",\n      \"#1001\"\n    ]\n  }\n}"

response = http.request(request)
puts response.read_body

{
  "message": {
    "uuid": "3a525ca2-6909-4c72-9399-905adf7f3a74",
    "from": "+14155550100",
    "to": "+447537151866",
    "status": "delivered",
    "template": {
      "name": "order_shipped",
      "language": "en_US"
    },
    "created_at": "2026-01-15T10:30:00.123Z"
  }
}

Authorizations

Authorization

string

header

required

Wavix API key. Pass as Authorization: Bearer <api_key>. Keys support per-resource scopes (none / read / write). See Restricted keys and scopes.

Body

application/json

Attributes of the message to send.

Attributes of a WhatsApp template message to send. Consumed by whatsapp_messages_send.

from

string

required

Phone number of a sender registered on your account, in E.164 format, as returned by whatsapp_senders_list. The leading + is optional.

Pattern: ^\+?\d{6,20}$

Example:

"+14155550100"

string

required

Recipient's phone number in E.164 format. The leading + is optional.

Pattern: ^\+?\d{6,20}$

Example:

"+447537151866"

template

WhatsAppSendTemplate · object

required

The template to send and the values for its dynamic parts. Consumed in template by whatsapp_messages_send.

Show child attributes

idempotency_key

string

Key that makes the send safe to retry, unique per account.

Maximum string length: 128

Example:

"order-1001-shipped"

Response

The message created by the earlier send with the same idempotency_key.

Returned by whatsapp_messages_send.

message

WhatsAppMessage · object

required

A WhatsApp message you sent. Returned by whatsapp_messages_send.

Show child attributes

Using the APIs

API reference

WebSocket protocol

Send a WhatsApp message

Authorizations

Body

Response