curl --request POST \
  --url https://api.cloudtalk.io/v1/contacts/lookup \
  --header 'Authorization: Basic <encoded-value>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "phones": [
    "+12025550143"
  ],
  "emails": [
    "[email protected]"
  ]
}
'

import requests

url = "https://api.cloudtalk.io/v1/contacts/lookup"

payload = {
    "phones": ["+12025550143"],
    "emails": ["[email protected]"]
}
headers = {
    "Authorization": "Basic <encoded-value>",
    "Content-Type": "application/json"
}

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

print(response.text)

const options = {
  method: 'POST',
  headers: {Authorization: 'Basic <encoded-value>', 'Content-Type': 'application/json'},
  body: JSON.stringify({phones: ['+12025550143'], emails: ['[email protected]']})
};

fetch('https://api.cloudtalk.io/v1/contacts/lookup', 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.cloudtalk.io/v1/contacts/lookup",
  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([
    'phones' => [
        '+12025550143'
    ],
    'emails' => [
        '[email protected]'
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Authorization: Basic <encoded-value>",
    "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.cloudtalk.io/v1/contacts/lookup"

	payload := strings.NewReader("{\n  \"phones\": [\n    \"+12025550143\"\n  ],\n  \"emails\": [\n    \"[email protected]\"\n  ]\n}")

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

	req.Header.Add("Authorization", "Basic <encoded-value>")
	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.cloudtalk.io/v1/contacts/lookup")
  .header("Authorization", "Basic <encoded-value>")
  .header("Content-Type", "application/json")
  .body("{\n  \"phones\": [\n    \"+12025550143\"\n  ],\n  \"emails\": [\n    \"[email protected]\"\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.cloudtalk.io/v1/contacts/lookup")

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

request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Basic <encoded-value>'
request["Content-Type"] = 'application/json'
request.body = "{\n  \"phones\": [\n    \"+12025550143\"\n  ],\n  \"emails\": [\n    \"[email protected]\"\n  ]\n}"

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

{
  "data": [
    {
      "id": "44210",
      "type": "contact",
      "name": "Jane Doe",
      "title": "Head of Procurement",
      "company": "Acme Inc.",
      "industry": "Manufacturing",
      "website": "https://acme.example.com",
      "address": "1 Market Street",
      "city": "San Francisco",
      "state": "CA",
      "zip": "94105",
      "country": {
        "code": "US",
        "name": "United States"
      },
      "phones": [
        "+12025550143",
        "+13105550166"
      ],
      "emails": [
        "[email protected]"
      ],
      "tags": [
        {
          "id": "123",
          "name": "vip",
          "readOnly": false
        }
      ],
      "customFields": {
        "Segment": "enterprise"
      },
      "favoriteUserId": "7",
      "source": "api",
      "createdAt": "2026-08-17T09:34:21Z",
      "updatedAt": "2026-10-02T14:05:11Z",
      "dashboardUrl": "https://dashboard.cloudtalk.io/menu/contacts/details/44210"
    }
  ],
  "pagination": {
    "limit": 20,
    "next": null
  },
  "requestId": "c9856b94-db55-402b-a6ba-adb130351158"
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "target": "<string>"
      }
    ],
    "target": "<string>"
  },
  "requestId": "<string>"
}

{
  "code": "UNAUTHORIZED",
  "message": "You are not authorized to access this resource."
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "target": "<string>"
      }
    ],
    "target": "<string>"
  },
  "requestId": "<string>"
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "target": "<string>"
      }
    ],
    "target": "<string>"
  },
  "requestId": "<string>"
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "target": "<string>"
      }
    ],
    "target": "<string>"
  },
  "requestId": "<string>"
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "target": "<string>"
      }
    ],
    "target": "<string>"
  },
  "requestId": "<string>"
}

<string>

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "target": "<string>"
      }
    ],
    "target": "<string>"
  },
  "requestId": "<string>"
}

{
  "error": {
    "code": "<string>",
    "message": "<string>",
    "details": [
      {
        "code": "<string>",
        "message": "<string>",
        "target": "<string>"
      }
    ],
    "target": "<string>"
  },
  "requestId": "<string>"
}