curl --request POST \
  --url https://your-instance.example.com/api/campaigns/validate-contacts \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "contacts": [
    {
      "firstName": "Jamie",
      "phoneNumber": "+14155550133"
    },
    {
      "firstName": "Casey",
      "phoneNumber": "+14155550144"
    }
  ],
  "segmentationConfig": {
    "enabled": false
  },
  "assignmentConfig": {
    "isAssignmentEnabled": false
  }
}
'

import requests

url = "https://your-instance.example.com/api/campaigns/validate-contacts"

payload = {
    "contacts": [
        {
            "firstName": "Jamie",
            "phoneNumber": "+14155550133"
        },
        {
            "firstName": "Casey",
            "phoneNumber": "+14155550144"
        }
    ],
    "segmentationConfig": { "enabled": False },
    "assignmentConfig": { "isAssignmentEnabled": 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({
    contacts: [
      {firstName: 'Jamie', phoneNumber: '+14155550133'},
      {firstName: 'Casey', phoneNumber: '+14155550144'}
    ],
    segmentationConfig: {enabled: false},
    assignmentConfig: {isAssignmentEnabled: false}
  })
};

fetch('https://your-instance.example.com/api/campaigns/validate-contacts', 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://your-instance.example.com/api/campaigns/validate-contacts",
  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([
    'contacts' => [
        [
                'firstName' => 'Jamie',
                'phoneNumber' => '+14155550133'
        ],
        [
                'firstName' => 'Casey',
                'phoneNumber' => '+14155550144'
        ]
    ],
    'segmentationConfig' => [
        'enabled' => false
    ],
    'assignmentConfig' => [
        'isAssignmentEnabled' => 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://your-instance.example.com/api/campaigns/validate-contacts"

	payload := strings.NewReader("{\n  \"contacts\": [\n    {\n      \"firstName\": \"Jamie\",\n      \"phoneNumber\": \"+14155550133\"\n    },\n    {\n      \"firstName\": \"Casey\",\n      \"phoneNumber\": \"+14155550144\"\n    }\n  ],\n  \"segmentationConfig\": {\n    \"enabled\": false\n  },\n  \"assignmentConfig\": {\n    \"isAssignmentEnabled\": false\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://your-instance.example.com/api/campaigns/validate-contacts")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"contacts\": [\n    {\n      \"firstName\": \"Jamie\",\n      \"phoneNumber\": \"+14155550133\"\n    },\n    {\n      \"firstName\": \"Casey\",\n      \"phoneNumber\": \"+14155550144\"\n    }\n  ],\n  \"segmentationConfig\": {\n    \"enabled\": false\n  },\n  \"assignmentConfig\": {\n    \"isAssignmentEnabled\": false\n  }\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://your-instance.example.com/api/campaigns/validate-contacts")

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  \"contacts\": [\n    {\n      \"firstName\": \"Jamie\",\n      \"phoneNumber\": \"+14155550133\"\n    },\n    {\n      \"firstName\": \"Casey\",\n      \"phoneNumber\": \"+14155550144\"\n    }\n  ],\n  \"segmentationConfig\": {\n    \"enabled\": false\n  },\n  \"assignmentConfig\": {\n    \"isAssignmentEnabled\": false\n  }\n}"

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

{
  "success": true,
  "data": {
    "newContacts": [
      {
        "firstName": "Jamie",
        "phoneNumber": "+14155550133"
      }
    ],
    "existingContacts": [],
    "assignedToOtherUsers": [],
    "alreadyMessagedOutbound": [],
    "alreadyMessagedInbound": [],
    "assignedToYouNotOwned": [],
    "protectedContacts": []
  }
}

{
  "success": false,
  "message": "Validation error",
  "error": "name is required"
}

{
  "success": false,
  "message": "Validation error",
  "error": "name is required"
}