Instead of ‘login’ and ‘password’ use your credentials from https://app.dataforseo.com/api-access

            

# Instead of 'login' and 'password' use your credentials from https://app.dataforseo.com/api-access \
login="login" \
password="password" \
cred="$(printf ${login}:${password} | base64)" \
curl --location --request POST "https://api.dataforseo.com/v3/on_page/duplicate_tags" \
--header "Authorization: Basic ${cred}"  \
--header "Content-Type: application/json" \
--data-raw "[
  {
    "id": "07281559-0695-0216-0000-c269be8b7592",
    "type": "duplicate_description",
    "limit": 10
  }
]"


        

<?php
// You can download this file from here https://cdn.dataforseo.com/v3/examples/php/php_RestClient.zip
require('RestClient.php');
$api_url = 'https://api.dataforseo.com/';
// Instead of 'login' and 'password' use your credentials from https://app.dataforseo.com/api-access
$client = new RestClient($api_url, null, 'login', 'password');

$post_array = array();
// simple way to get a result
$post_array[] = array(
   "id" => "07281559-0695-0216-0000-c269be8b7592",
   "type" => "duplicate_description",
   "limit" => 10
);
try {
   // POST /v3/on_page/duplicate_tags
   // the full list of possible parameters is available in documentation
   $result = $client->post('/v3/on_page/duplicate_tags', $post_array);
   print_r($result);
   // do something with post result
} catch (RestClientException $e) {
   echo "\n";
   print "HTTP code: {$e->getHttpCode()}\n";
   print "Error code: {$e->getCode()}\n";
   print "Message: {$e->getMessage()}\n";
   print  $e->getTraceAsString();
   echo "\n";
}

$client = null;
?>

            

from random import Random
from client import RestClient
# You can download this file from here https://api.dataforseo.com/v3/_examples/python/_python_Client.zip
client = RestClient("login", "password")

post_data = dict()
# simple way to get a result
post_data[len(post_data)] = dict(
    id="07281559-0695-0216-0000-c269be8b7592",
    type="duplicate_description",
    limit=10
)
# POST /v3/on_page/duplicate_tags
# the full list of possible parameters is available in documentation
response = client.post("/v3/on_page/duplicate_tags", post_data)
# you can find the full list of the response codes here https://docs.dataforseo.com/v3/appendix/errors
if response["status_code"] == 20000:
    print(response)
    # do something with result
else:
    print("error. Code: %d Message: %s" % (response["status_code"], response["status_message"]))


        

            

const post_array = [];

post_array.push({
  "id": "07281559-0695-0216-0000-c269be8b7592",
  "type": "duplicate_description",
  "limit": 10
});

const axios = require('axios');

axios({
  method: 'post',
  url: 'https://api.dataforseo.com/v3/on_page/duplicate_tags',
  auth: {
    username: 'login',
    password: 'password'
  },
  data: post_array,
  headers: {
    'content-type': 'application/json'
  }
}).then(function (response) {
  var result = response['data']['tasks'];
  // Result data
  console.log(result);
}).catch(function (error) {
  console.log(error);
});


        

            

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;

namespace DataForSeoDemos
{
    public static partial class Demos
    {
        public static async Task on_page_duplicate_tags()
        {
            var httpClient = new HttpClient
            {
                BaseAddress = new Uri("https://api.dataforseo.com/"),
                // Instead of 'login' and 'password' use your credentials from https://app.dataforseo.com/api-access
                DefaultRequestHeaders = { Authorization = new AuthenticationHeaderValue("Basic", Convert.ToBase64String(Encoding.ASCII.GetBytes("login:password"))) }                
            };
            var postData = new List<object>();
            // simple way to get a result
            postData.Add(new
            {
                id = "07281559-0695-0216-0000-c269be8b7592",
                type = "duplicate_description",
                limit = 10
            });
            // POST /v3/on_page/duplicate_tags
            // the full list of possible parameters is available in documentation
            var taskPostResponse = await httpClient.PostAsync("/v3/on_page/duplicate_tags", new StringContent(JsonConvert.SerializeObject(postData)));
            var result = JsonConvert.DeserializeObject<dynamic>(await taskPostResponse.Content.ReadAsStringAsync());
            // you can find the full list of the response codes here https://docs.dataforseo.com/v3/appendix/errors
            if (result.status_code == 20000)
            {
                // do something with result
                Console.WriteLine(result);
            }
            else
                Console.WriteLine($"error. Code: {result.status_code} Message: {result.status_message}");
        }
    }
}

        

The above command returns JSON structured like this:

{
  "version": "0.1.20210129",
  "status_code": 20000,
  "status_message": "Ok.",
  "time": "1.4464 sec.",
  "cost": 0,
  "tasks_count": 1,
  "tasks_error": 0,
  "tasks": [
    {
      "id": "07281559-0695-0216-0000-c269be8b7592",
      "status_code": 20000,
      "status_message": "Ok.",
      "time": "1.3477 sec.",
      "cost": 0,
      "result_count": 1,
      "path": [
        "v3",
        "on_page",
        "duplicate_tags"
      ],
      "data": {
        "api": "on_page",
        "function": "duplicate_tags",
        "type": "duplicate_description",
        "limit": 10
      },
      "result": [
        {
          "crawl_progress": "finished",
          "crawl_status": {
            "max_crawl_pages": 10,
            "pages_in_queue": 0,
            "pages_crawled": 10
          },
          "total_pages_count": 12,
          "pages_count": 10,
          "items_count": 1,
          "items": [
            {
              "accumulator": "Encuentra el regalo hecho a mano perfecto, prendas vintage y de tendencia, joyería única y más... muchísimo más.",
              "total_count": 2,
              "pages": [
                {
                  "resource_type": "html",
                  "status_code": 200,
                  "location": null,
                  "url": "https://www.etsy.com/mx/",
                  "meta": {
                    "title": "Etsy - Compra regalos hechos a mano, vintage, personalizados y únicos para todo el mundo",
                    "charset": 65001,
                    "follow": true,
                    "generator": null,
                    "htags": {
                      "h1": [
                        "Tu configuración de privacidad de Etsy",
                        "Encuentra cosas que te enamoren. Apoya a vendedores independientes. Solo en Etsy.",
                        "Actualiza tu configuración"
                      ],
                      "h3": [
                        "Configuración de la privacidad",
                        "Una comunidad única en su especie",
                        "Apoya a creadores independientes",
                        "Tranquilidad absoluta",
                        "Compra",
                        "Vende",
                        "Sobre Etsy",
                        "Ayuda"
                      ],
                      "h2": [
                        "Cookies y tecnologías obligatorias",
                        "Personalización del sitio",
                        "Publicidad personalizada",
                        "Descubrimientos para el día a día",
                        "Descubre una selección de artículos únicos",
                        "Nuestra selección",
                        "Nuestra selección",
                        "¿Qué es Etsy?",
                        "Pie de página"
                      ],
                      "h4": [
                        "¿Alguna pregunta? Encuentra aquí las respuestas a tus preguntas."
                      ]
                    },
                    "description": "Encuentra el regalo hecho a mano perfecto, prendas vintage y de tendencia, joyería única y más... muchísimo más.",
                    "favicon": "https://www.etsy.com/images/favicon.ico",
                    "meta_keywords": null,
                    "canonical": "https://www.etsy.com/mx/",
                    "internal_links_count": 73,
                    "external_links_count": 3,
                    "inbound_links_count": 24,
                    "images_count": 12,
                    "images_size": 209895,
                    "scripts_count": 7,
                    "scripts_size": 281845,
                    "stylesheets_count": 3,
                    "stylesheets_size": 95776,
                    "title_length": 88,
                    "description_length": 112,
                    "render_blocking_scripts_count": 4,
                    "render_blocking_stylesheets_count": 31,
                    "cumulative_layout_shift": 0.10156329069412295,
                    "content": {
                      "plain_text_size": 8077,
                      "plain_text_rate": 0.05434775294885511,
                      "plain_text_word_count": 1155,
                      "automated_readability_index": 20.769094905094903,
                      "coleman_liau_readability_index": 9.494734111543448,
                      "dale_chall_readability_index": 11.57178887778888,
                      "flesch_kincaid_readability_index": 6.1773626373626485,
                      "smog_readability_index": 27.996756024520007,
                      "description_to_content_consistency": 0.5625,
                      "title_to_content_consistency": 0.7142857313156128,
                      "meta_keywords_to_content_consistency": null
                    },
                    "deprecated_tags": null,
                    "duplicate_meta_tags": [
                      "description",
                      "viewport"
                    ],
                    "spell": null,
                    "resource_errors": {
                      "errors": [
                        {
                          "line": 877,
                          "message": "The closing tag and the currently open tag do not match."
                        },
                        {
                          "line": 878,
                          "message": "The closing tag and the currently open tag do not match."
                        },
                        {
                          "line": 880,
                          "message": "The closing tag and the currently open tag do not match."
                        },
                        {
                          "line": 882,
                          "message": "The closing tag and the currently open tag do not match."
                        },
                        {
                          "line": 1227,
                          "message": "Character reference is not terminated by a semicolon."
                        },
                        {
                          "line": 1227,
                          "message": "Character reference is not terminated by a semicolon."
                        },
                        {
                          "line": 1227,
                          "message": "Character reference is not terminated by a semicolon."
                        },
                        {
                          "line": 1227,
                          "message": "Character reference is not terminated by a semicolon."
                        },
                        {
                          "line": 1227,
                          "message": "Character reference is not terminated by a semicolon."
                        }
                      ],
                      "warnings": [
                        {
                          "line": 0,
                          "message": "Has node with more than 60 childs."
                        }
                      ]
                    },
                    "social_media_tags": {
                      "fb:app_id": "89186614300",
                      "og:site_name": "Etsy",
                      "og:locale": "es_ES",
                      "og:title": "Etsy - Compra regalos hechos a mano, vintage, personalizados y únicos para todo el mundo",
                      "og:description": "Encuentra el regalo hecho a mano perfecto, prendas vintage y de tendencia, joyería única y más... muchísimo más."
                    }
                  },
                  "page_timing": {
                    "time_to_interactive": 872,
                    "dom_complete": 1007,
                    "largest_contentful_paint": 1648.4750006347895,
                    "first_input_delay": 0.0550001859664917,
                    "connection_time": 10,
                    "time_to_secure_connection": 22,
                    "request_sent_time": 0,
                    "waiting_time": 406,
                    "download_time": 1,
                    "duration_time": 439,
                    "fetch_start": 0,
                    "fetch_end": 439
                  },
                  "onpage_score": 88.36,
                  "total_dom_size": 2312840,
                  "custom_js_response": null,
                  "custom_js_client_exception": null,
                  "broken_resources": false,
                  "broken_links": false,
                  "duplicate_title": true,
                  "duplicate_description": true,
                  "duplicate_content": true,
                  "click_depth": 1,
                  "size": 148870,
                  "encoded_size": 33167,
                  "total_transfer_size": 34974,
                  "fetch_time": "2021-02-24 17:02:22 +00:00",
                  "cache_control": {
                    "cachable": false,
                    "ttl": 0
                  },
                  "checks": {
                    "no_content_encoding": false,
                    "high_loading_time": false,
                    "is_redirect": false,
                    "is_4xx_code": false,
                    "is_5xx_code": false,
                    "is_broken": false,
                    "is_www": true,
                    "is_https": true,
                    "is_http": false,
                    "high_waiting_time": false,
                    "no_doctype": false,
                    "canonical": true,
                    "no_encoding_meta_tag": true,
                    "no_h1_tag": false,
                    "https_to_http_links": false,
                    "has_html_doctype": true,
                    "size_greater_than_3mb": false,
                    "meta_charset_consistency": true,
                    "has_meta_refresh_redirect": false,
                    "has_render_blocking_resources": true,
                    "redirect_chain": false,
                    "low_content_rate": true,
                    "high_content_rate": false,
                    "low_character_count": false,
                    "high_character_count": false,
                    "small_page_size": false,
                    "large_page_size": false,
                    "low_readability_rate": true,
                    "irrelevant_description": false,
                    "irrelevant_title": false,
                    "irrelevant_meta_keywords": false,
                    "title_too_long": true,
                    "title_too_short": false,
                    "deprecated_html_tags": false,
                    "duplicate_meta_tags": true,
                    "duplicate_title_tag": false,
                    "no_image_alt": true,
                    "no_image_title": true,
                    "no_description": false,
                    "no_title": false,
                    "no_favicon": false,
                    "seo_friendly_url": false,
                    "flash": false,
                    "frame": false,
                    "lorem_ipsum": false,
                    "seo_friendly_url_characters_check": true,
                    "seo_friendly_url_dynamic_check": true,
                    "seo_friendly_url_keywords_check": false,
                    "seo_friendly_url_relative_length_check": true,
                    "is_orphan_page": false,
                    "is_link_relation_conflict": false,
                    "has_links_to_redirects": false,
                    "recursive_canonical": false,
                    "canonical_chain": false,
                    "canonical_to_redirect": false,
                    "canonical_to_broken": false
                  },
                  "content_encoding": "gzip",
                  "media_type": "text/html",
                  "server": "Apache",
                  "is_resource": false,
                  "last_modified": {
                    "header": "2021-10-21 14:11:10 +00:00",
                    "sitemap": null,
                    "meta_tag": "2021-03-15 00:00:00 +00:00"
                  }
                }
              ]
            }
          ]
        }
      ]
    }
  ]
}