Title: RequestAuthenticationMethod::getImplementationClass
Published: May 20, 2026

---

# RequestAuthenticationMethod::getImplementationClass(): WordPressAiClientProvidersHttpEnumsclass-string<RequestAuthenticationInterface&WithArrayTransformationInterface>

## In this article

 * [Return](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-enums-requestauthenticationmethod/getimplementationclass/?output_format=md#return)
 * [Source](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-enums-requestauthenticationmethod/getimplementationclass/?output_format=md#source)
 * [Changelog](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-enums-requestauthenticationmethod/getimplementationclass/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-enums-requestauthenticationmethod/getimplementationclass/?output_format=md#wp--skip-link--target)

Gets the implementation class for the authentication method.

## 󠀁[Return](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-enums-requestauthenticationmethod/getimplementationclass/?output_format=md#return)󠁿

 WordPressAiClientProvidersHttpEnumsclass-string<RequestAuthenticationInterface&
WithArrayTransformationInterface> The implementation class.

## 󠀁[Source](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-enums-requestauthenticationmethod/getimplementationclass/?output_format=md#source)󠁿

    ```php
    public function getImplementationClass(): string
    {
        // At the moment, this is the only supported method.
        // Once more methods are available, add conditionals here for each method.
        return ApiKeyRequestAuthentication::class;
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/php-ai-client/src/providers/http/enums/requestauthenticationmethod.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/php-ai-client/src/Providers/Http/Enums/RequestAuthenticationMethod.php#L33)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/php-ai-client/src/Providers/Http/Enums/RequestAuthenticationMethod.php#L33-L38)

## 󠀁[Changelog](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-enums-requestauthenticationmethod/getimplementationclass/?output_format=md#changelog)󠁿

| Version | Description | 
| [0.4.0](https://developer.wordpress.org/reference/since/0.4.0/) | Introduced. |

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