Get Gender by Username - Multiple Request

The Multiple Username endpoint allows you to analyze the gender of up to 50 usernames in a single request. This is useful for bulk processing and high-performance integrations. All parameters are sent via a POST request as JSON. You must authenticate using the Bearer token method in the Authorization header.

The API will try to extract a likely first name from each username, which may help improve gender prediction. You can also pass an optional country filter and a custom id field for each record to match results with your database.

Request URL

POST https://api.genderapi.io/api/username/multi/country

Required HTTP Headers

• Content-Type: application/json
• Authorization: Bearer YOUR_API_KEY

Request Body Parameters

Example Request Body

{
  "data": [
    { "username": "anna_smith88", "country": "US", "id": "123" },
    { "username": "michael_bauer", "country": "DE", "id": "456" },
    { "username": "giulia_rossi", "country": "IT", "id": "789" }
  ]
}

Example Requests

cURL Example

curl -X POST "https://api.genderapi.io/api/username/multi/country" \
     -H "Content-Type: application/json" \
     -H "Authorization: Bearer YOUR_API_KEY" \
     -d '{"data":[{"username":"anna_smith88","country":"US","id":"123"},{"username":"michael_bauer","country":"DE","id":"456"},{"username":"giulia_rossi","country":"IT","id":"789"}]}'

PHP cURL Example

<?php
$url = "https://api.genderapi.io/api/username/multi/country";

$data = array(
    "data" => array(
        array(
            "username" => "anna_smith88",
            "country" => "US",
            "id" => "123"
        ),
        array(
            "username" => "michael_bauer",
            "country" => "DE",
            "id" => "456"
        ),
        array(
            "username" => "giulia_rossi",
            "country" => "IT",
            "id" => "789"
        )
    )
);

$payload = json_encode($data);

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    "Content-Type: application/json",
    "Authorization: Bearer YOUR_API_KEY"
));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $payload);

$response = curl_exec($ch);
curl_close($ch);

echo $response;
?>

JavaScript fetch Example

fetch("https://api.genderapi.io/api/username/multi/country", {
  method: "POST",
  headers: {
    "Content-Type": "application/json",
    "Authorization": "Bearer YOUR_API_KEY"
  },
  body: JSON.stringify({
    data: [
      { username: "anna_smith88", country: "US", id: "123" },
      { username: "michael_bauer", country: "DE", id: "456" },
      { username: "giulia_rossi", country: "IT", id: "789" }
    ]
  })
})
.then(response => response.json())
.then(data => console.log(data));

Python requests Example

import requests

url = "https://api.genderapi.io/api/username/multi/country"

payload = {
    "data": [
        { "username": "anna_smith88", "country": "US", "id": "123" },
        { "username": "michael_bauer", "country": "DE", "id": "456" },
        { "username": "giulia_rossi", "country": "IT", "id": "789" }
    ]
}

headers = {
    "Content-Type": "application/json",
    "Authorization": "Bearer YOUR_API_KEY"
}

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

print(response.json())

Example JSON Response

{
  "status": true,
  "used_credits": 3,
  "remaining_credits": 7265,
  "expires": 1717069765,
  "names": [
    {
      "name": "Anna",
      "q": "anna_smith88",
      "gender": "female",
      "country": "US",
      "total_names": 1234,
      "probability": 92,
      "id": "123"
    },
    {
      "name": "Michael",
      "q": "michael_bauer",
      "gender": "male",
      "country": "DE",
      "total_names": 5678,
      "probability": 89,
      "id": "456"
    },
    {
      "name": "Giulia",
      "q": "giulia_rossi",
      "gender": "female",
      "country": "IT",
      "total_names": 4321,
      "probability": 95,
      "id": "789"
    }
  ],
  "duration": "5ms"
}

Response Fields