Title: ClientException
Published: May 20, 2026

---

# class ClientException {}

## In this article

 * [Description](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-clientexception/?output_format=md#description)
 * [Methods](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-clientexception/?output_format=md#methods)
 * [Source](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-clientexception/?output_format=md#source)
 * [Changelog](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-clientexception/?output_format=md#changelog)

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

Exception thrown for 4xx HTTP client errors.

## 󠀁[Description](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-clientexception/?output_format=md#description)󠁿

This represents errors where the client request was malformed, unauthorized, forbidden,
or otherwise invalid.

## 󠀁[Methods](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-clientexception/?output_format=md#methods)󠁿

| Name | Description | 
| [ClientException::fromClientErrorResponse](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-clientexception/fromclienterrorresponse/) | Creates a ClientException from a client error response (4xx). | 
| [ClientException::getRequest](https://developer.wordpress.org/reference/classes/wordpress-aiclient-providers-http-exception-clientexception/getrequest/) | Returns the request that failed as our Request DTO. |

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

    ```php
    class ClientException extends InvalidArgumentException
    {
        /**
         * The request that failed.
         *
         * @var Request|null
         */
        protected ?Request $request = null;
        /**
         * Returns the request that failed as our Request DTO.
         *
         * @since 0.2.0
         *
         * @return Request
         * @throws \RuntimeException If no request is available
         */
        public function getRequest(): Request
        {
            if ($this->request === null) {
                throw new \RuntimeException('Request object not available. This exception was directly instantiated. ' . 'Use a factory method that provides request context.');
            }
            return $this->request;
        }
        /**
         * Creates a ClientException from a client error response (4xx).
         *
         * This method extracts error details from common API response formats
         * and creates an exception with a descriptive message and status code.
         *
         * @since 0.2.0
         *
         * @param Response $response The HTTP response that failed.
         * @return self
         */
        public static function fromClientErrorResponse(Response $response): self
        {
            $statusCode = $response->getStatusCode();
            $statusTexts = [400 => 'Bad Request', 401 => 'Unauthorized', 403 => 'Forbidden', 404 => 'Not Found', 422 => 'Unprocessable Entity', 429 => 'Too Many Requests'];
            if (isset($statusTexts[$statusCode])) {
                $errorMessage = sprintf('%s (%d)', $statusTexts[$statusCode], $statusCode);
            } else {
                $errorMessage = sprintf('Client error (%d): Request was rejected due to client-side issue', $statusCode);
            }
            // Extract error message from response data using centralized utility
            $extractedError = ErrorMessageExtractor::extractFromResponseData($response->getData());
            if ($extractedError !== null) {
                $errorMessage .= ' - ' . $extractedError;
            }
            return new self($errorMessage, $statusCode);
        }
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/php-ai-client/src/providers/http/exception/clientexception.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/php-ai-client/src/Providers/Http/Exception/ClientException.php#L18)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/php-ai-client/src/Providers/Http/Exception/ClientException.php#L18-L68)

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

| Version | Description | 
| [0.2.0](https://developer.wordpress.org/reference/since/0.2.0/) | Introduced. |

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