curl --request POST \
  --url https://api.heyy.io/v3/contacts/{contactId}/labels \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "labels": [
    {
      "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
    }
  ]
}
'

import requests

url = "https://api.heyy.io/v3/contacts/{contactId}/labels"

payload = { "labels": [{ "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a" }] }
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({labels: [{id: '3c90c3cc-0d44-4b50-8888-8dd25736052a'}]})
};

fetch('https://api.heyy.io/v3/contacts/{contactId}/labels', 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.heyy.io/v3/contacts/{contactId}/labels",
  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([
    'labels' => [
        [
                'id' => '3c90c3cc-0d44-4b50-8888-8dd25736052a'
        ]
    ]
  ]),
  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.heyy.io/v3/contacts/{contactId}/labels"

	payload := strings.NewReader("{\n  \"labels\": [\n    {\n      \"id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\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.heyy.io/v3/contacts/{contactId}/labels")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{\n  \"labels\": [\n    {\n      \"id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.heyy.io/v3/contacts/{contactId}/labels")

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  \"labels\": [\n    {\n      \"id\": \"3c90c3cc-0d44-4b50-8888-8dd25736052a\"\n    }\n  ]\n}"

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

{
  "success": true,
  "data": {
    "id": "<string>",
    "createdAt": "2023-11-07T05:31:56Z",
    "updatedAt": "2023-11-07T05:31:56Z",
    "firstName": "<string>",
    "lastName": "<string>",
    "fullName": "<string>",
    "isSubscribed": true,
    "handles": [
      {
        "id": "<string>",
        "createdAt": "2023-11-07T05:31:56Z",
        "updatedAt": "2023-11-07T05:31:56Z",
        "type": "phone_number",
        "isPrimary": true,
        "value": "<string>",
        "extra": {},
        "hasChats": true
      }
    ],
    "labels": [
      {
        "id": "<string>"
      }
    ],
    "attributes": [
      {
        "attribute": {
          "id": "<string>",
          "createdAt": "2023-11-07T05:31:56Z",
          "updatedAt": "2023-11-07T05:31:56Z",
          "name": "<string>",
          "type": "text",
          "displayName": "<string>",
          "visibility": {
            "inbox": true,
            "contacts": true,
            "create": true
          },
          "details": {
            "options": [
              {
                "color": "<string>",
                "value": "<string>"
              }
            ]
          }
        },
        "value": "<string>",
        "id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
        "contactId": "3c90c3cc-0d44-4b50-8888-8dd25736052a"
      }
    ],
    "displayName": "<string>",
    "phoneNumber": "<string>",
    "email": "<string>",
    "chats": [
      {
        "id": "<string>"
      }
    ],
    "metadata": {}
  }
}

{
  "success": false,
  "error": {
    "messageKey": "invalid_body_params",
    "message": "Invalid body params",
    "invalidParams": {
      "email": {
        "key": "invalid_string",
        "message": "Invalid email"
      }
    }
  }
}

{
  "success": false,
  "error": {
    "messageKey": "unauthorized",
    "message": "Unauthorized"
  }
}

{
  "success": false,
  "error": {
    "messageKey": "insufficient_billing_plan",
    "message": "Insufficient billing plan"
  }
}

{
  "success": false,
  "error": {
    "messageKey": "forbidden",
    "message": "Forbidden"
  }
}

{
  "success": false,
  "error": {
    "messageKey": "contact_not_found",
    "message": "Contact not found"
  }
}

{
  "success": false,
  "error": {
    "messageKey": "too_many_requests",
    "message": "Too many requests. Limit is applied per minute per tenant. Please retry after the time indicated by the X-RateLimit-Reset header."
  }
}

{
  "success": false,
  "error": {
    "messageKey": "internal_error",
    "message": "Oops! Something went wrong"
  }
}