curl --request POST \
  --url https://{tenant_domain}/third-party/v1/whatsapp/campaigns/{id}/recipients \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "recipients": [
    {
      "phone_number": "+49123456789",
      "placeholders": {
        "first_name": "Jane",
        "order_id": "12345"
      },
      "profile_id": 123,
      "name": "Jane Doe"
    }
  ],
  "reset": false,
  "is_last": false
}
'

import requests

url = "https://{tenant_domain}/third-party/v1/whatsapp/campaigns/{id}/recipients"

payload = {
    "recipients": [
        {
            "phone_number": "+49123456789",
            "placeholders": {
                "first_name": "Jane",
                "order_id": "12345"
            },
            "profile_id": 123,
            "name": "Jane Doe"
        }
    ],
    "reset": False,
    "is_last": False
}
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({
    recipients: [
      {
        phone_number: '+49123456789',
        placeholders: {first_name: 'Jane', order_id: '12345'},
        profile_id: 123,
        name: 'Jane Doe'
      }
    ],
    reset: false,
    is_last: false
  })
};

fetch('https://{tenant_domain}/third-party/v1/whatsapp/campaigns/{id}/recipients', 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://{tenant_domain}/third-party/v1/whatsapp/campaigns/{id}/recipients",
  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([
    'recipients' => [
        [
                'phone_number' => '+49123456789',
                'placeholders' => [
                                'first_name' => 'Jane',
                                'order_id' => '12345'
                ],
                'profile_id' => 123,
                'name' => 'Jane Doe'
        ]
    ],
    'reset' => false,
    'is_last' => false
  ]),
  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://{tenant_domain}/third-party/v1/whatsapp/campaigns/{id}/recipients"

	payload := strings.NewReader("{\n  \"recipients\": [\n    {\n      \"phone_number\": \"+49123456789\",\n      \"placeholders\": {\n        \"first_name\": \"Jane\",\n        \"order_id\": \"12345\"\n      },\n      \"profile_id\": 123,\n      \"name\": \"Jane Doe\"\n    }\n  ],\n  \"reset\": false,\n  \"is_last\": false\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://{tenant_domain}/third-party/v1/whatsapp/campaigns/{id}/recipients")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"recipients\": [\n    {\n      \"phone_number\": \"+49123456789\",\n      \"placeholders\": {\n        \"first_name\": \"Jane\",\n        \"order_id\": \"12345\"\n      },\n      \"profile_id\": 123,\n      \"name\": \"Jane Doe\"\n    }\n  ],\n  \"reset\": false,\n  \"is_last\": false\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://{tenant_domain}/third-party/v1/whatsapp/campaigns/{id}/recipients")

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  \"recipients\": [\n    {\n      \"phone_number\": \"+49123456789\",\n      \"placeholders\": {\n        \"first_name\": \"Jane\",\n        \"order_id\": \"12345\"\n      },\n      \"profile_id\": 123,\n      \"name\": \"Jane Doe\"\n    }\n  ],\n  \"reset\": false,\n  \"is_last\": false\n}"

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

{
  "data": {
    "received": 1000,
    "inserted": 987,
    "skipped": 13,
    "total": 4187,
    "finalized": false
  }
}