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 GET "https://api.dataforseo.com/v3/keywords_data/bing/audience_estimation/job_functions" \
--header "Authorization: Basic ${cred}" \
--header "Content-Type: application/json" \

<?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');

try {
	// using this method you can get a list of job functions
	// GET /v3/keywords_data/bing/audience_estimation/job_functions
	$result = $client->get('/v3/keywords_data/bing/audience_estimation/job_functions');
	print_r($result);
	// do something with 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 client import RestClient
# You can download this file from here https://cdn.dataforseo.com/v3/examples/python/python_Client.zip
client = RestClient("login", "password")
# using this method you can get a list of job functions
# GET /v3/keywords_data/bing/audience_estimation/job_functions
# the full list of possible parameters is available in documentation
response = client.get("/v3/keywords_data/bing/audience_estimation/job_functions")
# 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 axios = require('axios');

axios({
    method: 'get',
    url: 'https://api.dataforseo.com/v3/keywords_data/bing/audience_estimation/job_functions',
    auth: {
        username: 'login',
        password: 'password'
    },
    headers: {
        'content-type': 'application/json'
    }
}).then(function (response) {
    var result = response['data']['tasks'][0]['result'];
    // Result data
    console.log(result);
}).catch(function (error) {
    console.log(error);
});

using Newtonsoft.Json;
using System;
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 keywords_data_bing_audience_estimation_job_functions()
        {
            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"))) }
            };
            // using this method you can get a list of job functions
            // GET /v3/keywords_data/bing/audience_estimation/job_functions
            // the full list of possible parameters is available in documentation
            var response = await httpClient.GetAsync("/v3/keywords_data/bing/audience_estimation/job_functions");
            var result = JsonConvert.DeserializeObject<dynamic>(await response.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": "0.1.20240801",
  "status_code": 20000,
  "status_message": "Ok.",
  "time": "0.0648 sec.",
  "cost": 0,
  "tasks_count": 1,
  "tasks_error": 0,
  "tasks": [
    {
      "id": "09271638-1535-0603-0000-457ce2c34757",
      "status_code": 20000,
      "status_message": "Ok.",
      "time": "0.0001 sec.",
      "cost": 0,
      "result_count": 26,
      "path": [
        "v3",
        "keywords_data",
        "bing",
        "audience_estimation",
        "job_functions"
      ],
      "data": {
        "api": "keywords_data",
        "function": "job_functions",
        "se": "bing",
        "se_type": "audience_estimation"
      },
      "result": [
        {
          "job_function_id": 806299177,
          "job_function_name": "Education"
        },
        {
          "job_function_id": 806298687,
          "job_function_name": "Community and Social Services"
        },
        {
          "job_function_id": 806300647,
          "job_function_name": "Program and Project Management"
        },
        {
          "job_function_id": 806298785,
          "job_function_name": "Arts and Design"
        },
        {
          "job_function_id": 806299275,
          "job_function_name": "Media and Communication"
        },
        {
          "job_function_id": 806299667,
          "job_function_name": "Research"
        },
        {
          "job_function_id": 806299765,
          "job_function_name": "Support"
        },
        {
          "job_function_id": 806299079,
          "job_function_name": "Quality Assurance"
        },
        {
          "job_function_id": 806300451,
          "job_function_name": "Legal"
        },
        {
          "job_function_id": 806299569,
          "job_function_name": "Engineering"
        },
        {
          "job_function_id": 806299863,
          "job_function_name": "Entrepreneurship"
        },
        {
          "job_function_id": 806300843,
          "job_function_name": "Product Management"
        },
        {
          "job_function_id": 806299961,
          "job_function_name": "Purchasing"
        },
        {
          "job_function_id": 806300745,
          "job_function_name": "Operations"
        },
        {
          "job_function_id": 806300255,
          "job_function_name": "Real Estate"
        },
        {
          "job_function_id": 806299373,
          "job_function_name": "Healthcare Services"
        },
        {
          "job_function_id": 806300059,
          "job_function_name": "Military and Protective Services"
        },
        {
          "job_function_id": 806299471,
          "job_function_name": "Administrative"
        },
        {
          "job_function_id": 806298981,
          "job_function_name": "Human Resources"
        },
        {
          "job_function_id": 806301126,
          "job_function_name": "Information Technology"
        },
        {
          "job_function_id": 806300549,
          "job_function_name": "Consulting"
        },
        {
          "job_function_id": 806298607,
          "job_function_name": "Marketing"
        },
        {
          "job_function_id": 806300353,
          "job_function_name": "Sales"
        },
        {
          "job_function_id": 806301028,
          "job_function_name": "Business Development"
        },
        {
          "job_function_id": 806298883,
          "job_function_name": "Finance"
        },
        {
          "job_function_id": 806300157,
          "job_function_name": "Accounting"
        }
      ]
    }
  ]
}