プログラミング言語向けのライブラリはありますか？

まず composer を使ってライブラリをインストールします:

composer require gender-api/client

<?php

use GenderApi\Client as GenderApiClient;

$client = new GenderApiClient('your-api-key');

// Simple gender lookup
$result = $client->getByFirstName('Elisabeth');

if ($result->genderFound()) {
    echo $result->getGender();    // "female"
    echo $result->getAccuracy();  // 99
}

// First name with country (e.g., "Andrea" varies by country)
$result = $client->getByFirstNameAndCountry('Andrea', 'IT');
echo $result->getGender(); // "male" (in Italy)

// Full name with automatic first/last name splitting
$result = $client->getByFirstNameAndLastName('Sandra Miller');

echo $result->getFirstName(); // "Sandra"
echo $result->getLastName();  // "Miller"
echo $result->getGender();    // "female"

// Email address analysis
$result = $client->getByEmailAddress('elisabeth.smith@company.com');
echo $result->getGender();  // "female"

// Batch processing - multiple names in one call
$names = ['Michael', 'Sarah', 'Kim'];
$results = $client->getByMultipleNames($names);

foreach ($results as $result) {
    printf(
        "%s: %s (%d%% confidence)\n",
        $result->getFirstName(),
        $result->getGender(),
        $result->getAccuracy()
    );
}

クライアントの詳細なドキュメントはこちら:

https://github.com/markus-perl/gender-api-client