Title: Psr18ClientDiscovery
Published: May 20, 2026

---

# class Psr18ClientDiscovery {}

## In this article

 * [Methods](https://developer.wordpress.org/reference/classes/wordpress-aiclientdependencies-http-discovery-psr18clientdiscovery/?output_format=md#methods)
 * [Source](https://developer.wordpress.org/reference/classes/wordpress-aiclientdependencies-http-discovery-psr18clientdiscovery/?output_format=md#source)

[ Back to top](https://developer.wordpress.org/reference/classes/wordpress-aiclientdependencies-http-discovery-psr18clientdiscovery/?output_format=md#wp--skip-link--target)

Finds a PSR-18 HTTP Client.

## 󠀁[Methods](https://developer.wordpress.org/reference/classes/wordpress-aiclientdependencies-http-discovery-psr18clientdiscovery/?output_format=md#methods)󠁿

| Name | Description | 
| [Psr18ClientDiscovery::find](https://developer.wordpress.org/reference/classes/wordpress-aiclientdependencies-http-discovery-psr18clientdiscovery/find/) | Finds a PSR-18 HTTP Client. |

## 󠀁[Source](https://developer.wordpress.org/reference/classes/wordpress-aiclientdependencies-http-discovery-psr18clientdiscovery/?output_format=md#source)󠁿

    ```php
    final class Psr18ClientDiscovery extends ClassDiscovery
    {
        /**
         * Finds a PSR-18 HTTP Client.
         *
         * @return ClientInterface
         *
         * @throws RealNotFoundException
         */
        public static function find()
        {
            try {
                $client = static::findOneByType(ClientInterface::class);
            } catch (DiscoveryFailedException $e) {
                throw new RealNotFoundException('No PSR-18 clients found. Make sure to install a package providing "psr/http-client-implementation". Example: "php-http/guzzle7-adapter".', 0, $e);
            }
            return static::instantiateClass($client);
        }
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/php-ai-client/third-party/http/discovery/psr18clientdiscovery.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/php-ai-client/third-party/Http/Discovery/Psr18ClientDiscovery.php#L13)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/php-ai-client/third-party/Http/Discovery/Psr18ClientDiscovery.php#L13-L31)

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