diff --git a/src/Utility/HttpStatus.php b/src/Utility/HttpStatus.php
new file mode 100644
index 000000000..495f8529c
--- /dev/null
+++ b/src/Utility/HttpStatus.php
@@ -0,0 +1,193 @@
+<?php
+/**
+ * Helper class for dealing with HTTP status codes.
+ *
+ * @package Requests\Utilities
+ */
+
+namespace WpOrg\Requests\Utility;
+
+use WpOrg\Requests\Exception\InvalidArgument;
+
+/**
+ * HTTP status codes helper class.
+ *
+ * @package Requests\Utilities
+ */
+final class HttpStatus {
+	const TEXT_100 = 'Continue';
+	const TEXT_101 = 'Switching Protocols';
+	const TEXT_200 = 'OK';
+	const TEXT_201 = 'Created';
+	const TEXT_202 = 'Accepted';
+	const TEXT_203 = 'Non-Authoritative Information';
+	const TEXT_204 = 'No Content';
+	const TEXT_205 = 'Reset Content';
+	const TEXT_206 = 'Partial Content';
+	const TEXT_300 = 'Multiple Choices';
+	const TEXT_301 = 'Moved Permanently';
+	const TEXT_302 = 'Found';
+	const TEXT_303 = 'See Other';
+	const TEXT_304 = 'Not Modified';
+	const TEXT_305 = 'Use Proxy';
+	const TEXT_306 = '(Unused)';
+	const TEXT_307 = 'Temporary Redirect';
+	const TEXT_400 = 'Bad Request';
+	const TEXT_401 = 'Unauthorized';
+	const TEXT_402 = 'Payment Required';
+	const TEXT_403 = 'Forbidden';
+	const TEXT_404 = 'Not Found';
+	const TEXT_405 = 'Method Not Allowed';
+	const TEXT_406 = 'Not Acceptable';
+	const TEXT_407 = 'Proxy Authentication Required';
+	const TEXT_408 = 'Request Timeout';
+	const TEXT_409 = 'Conflict';
+	const TEXT_410 = 'Gone';
+	const TEXT_411 = 'Length Required';
+	const TEXT_412 = 'Precondition Failed';
+	const TEXT_413 = 'Request Entity Too Large';
+	const TEXT_414 = 'Request-URI Too Long';
+	const TEXT_415 = 'Unsupported Media Type';
+	const TEXT_416 = 'Requested Range Not Satisfiable';
+	const TEXT_417 = 'Expectation Failed';
+	const TEXT_418 = 'I\'m a teapot';
+	const TEXT_428 = 'Precondition Required';
+	const TEXT_429 = 'Too Many Requests';
+	const TEXT_431 = 'Request Header Fields Too Large';
+	const TEXT_500 = 'Internal Server Error';
+	const TEXT_501 = 'Not Implemented';
+	const TEXT_502 = 'Bad Gateway';
+	const TEXT_503 = 'Service Unavailable';
+	const TEXT_504 = 'Gateway Timeout';
+	const TEXT_505 = 'HTTP Version Not Supported';
+	const TEXT_511 = 'Network Authentication Required';
+
+	const TEXT_WITH_CODE_100 = '100 ' . self::TEXT_100;
+	const TEXT_WITH_CODE_101 = '101 ' . self::TEXT_101;
+	const TEXT_WITH_CODE_200 = '200 ' . self::TEXT_200;
+	const TEXT_WITH_CODE_201 = '201 ' . self::TEXT_201;
+	const TEXT_WITH_CODE_202 = '202 ' . self::TEXT_202;
+	const TEXT_WITH_CODE_203 = '203 ' . self::TEXT_203;
+	const TEXT_WITH_CODE_204 = '204 ' . self::TEXT_204;
+	const TEXT_WITH_CODE_205 = '205 ' . self::TEXT_205;
+	const TEXT_WITH_CODE_206 = '206 ' . self::TEXT_206;
+	const TEXT_WITH_CODE_300 = '300 ' . self::TEXT_300;
+	const TEXT_WITH_CODE_301 = '301 ' . self::TEXT_301;
+	const TEXT_WITH_CODE_302 = '302 ' . self::TEXT_302;
+	const TEXT_WITH_CODE_303 = '303 ' . self::TEXT_303;
+	const TEXT_WITH_CODE_304 = '304 ' . self::TEXT_304;
+	const TEXT_WITH_CODE_305 = '305 ' . self::TEXT_305;
+	const TEXT_WITH_CODE_306 = '306 ' . self::TEXT_306;
+	const TEXT_WITH_CODE_307 = '307 ' . self::TEXT_307;
+	const TEXT_WITH_CODE_400 = '400 ' . self::TEXT_400;
+	const TEXT_WITH_CODE_401 = '401 ' . self::TEXT_401;
+	const TEXT_WITH_CODE_402 = '402 ' . self::TEXT_402;
+	const TEXT_WITH_CODE_403 = '403 ' . self::TEXT_403;
+	const TEXT_WITH_CODE_404 = '404 ' . self::TEXT_404;
+	const TEXT_WITH_CODE_405 = '405 ' . self::TEXT_405;
+	const TEXT_WITH_CODE_406 = '406 ' . self::TEXT_406;
+	const TEXT_WITH_CODE_407 = '407 ' . self::TEXT_407;
+	const TEXT_WITH_CODE_408 = '408 ' . self::TEXT_408;
+	const TEXT_WITH_CODE_409 = '409 ' . self::TEXT_409;
+	const TEXT_WITH_CODE_410 = '410 ' . self::TEXT_410;
+	const TEXT_WITH_CODE_411 = '411 ' . self::TEXT_411;
+	const TEXT_WITH_CODE_412 = '412 ' . self::TEXT_412;
+	const TEXT_WITH_CODE_413 = '413 ' . self::TEXT_413;
+	const TEXT_WITH_CODE_414 = '414 ' . self::TEXT_414;
+	const TEXT_WITH_CODE_415 = '415 ' . self::TEXT_415;
+	const TEXT_WITH_CODE_416 = '416 ' . self::TEXT_416;
+	const TEXT_WITH_CODE_417 = '417 ' . self::TEXT_417;
+	const TEXT_WITH_CODE_418 = '418 ' . self::TEXT_418;
+	const TEXT_WITH_CODE_428 = '428 ' . self::TEXT_428;
+	const TEXT_WITH_CODE_429 = '429 ' . self::TEXT_429;
+	const TEXT_WITH_CODE_431 = '431 ' . self::TEXT_431;
+	const TEXT_WITH_CODE_500 = '500 ' . self::TEXT_500;
+	const TEXT_WITH_CODE_501 = '501 ' . self::TEXT_501;
+	const TEXT_WITH_CODE_502 = '502 ' . self::TEXT_502;
+	const TEXT_WITH_CODE_503 = '503 ' . self::TEXT_503;
+	const TEXT_WITH_CODE_504 = '504 ' . self::TEXT_504;
+	const TEXT_WITH_CODE_505 = '505 ' . self::TEXT_505;
+	const TEXT_WITH_CODE_511 = '511 ' . self::TEXT_511;
+
+	/**
+	 * Map of status codes to their text.
+	 *
+	 * @var array<string>
+	 */
+	const MAP = [
+		100 => self::TEXT_100,
+		101 => self::TEXT_101,
+		200 => self::TEXT_200,
+		201 => self::TEXT_201,
+		202 => self::TEXT_202,
+		203 => self::TEXT_203,
+		204 => self::TEXT_204,
+		205 => self::TEXT_205,
+		206 => self::TEXT_206,
+		300 => self::TEXT_300,
+		301 => self::TEXT_301,
+		302 => self::TEXT_302,
+		303 => self::TEXT_303,
+		304 => self::TEXT_304,
+		305 => self::TEXT_305,
+		306 => self::TEXT_306,
+		307 => self::TEXT_307,
+		400 => self::TEXT_400,
+		401 => self::TEXT_401,
+		402 => self::TEXT_402,
+		403 => self::TEXT_403,
+		404 => self::TEXT_404,
+		405 => self::TEXT_405,
+		406 => self::TEXT_406,
+		407 => self::TEXT_407,
+		408 => self::TEXT_408,
+		409 => self::TEXT_409,
+		410 => self::TEXT_410,
+		411 => self::TEXT_411,
+		412 => self::TEXT_412,
+		413 => self::TEXT_413,
+		414 => self::TEXT_414,
+		415 => self::TEXT_415,
+		416 => self::TEXT_416,
+		417 => self::TEXT_417,
+		418 => self::TEXT_418,
+		428 => self::TEXT_428,
+		429 => self::TEXT_429,
+		431 => self::TEXT_431,
+		500 => self::TEXT_500,
+		501 => self::TEXT_501,
+		502 => self::TEXT_502,
+		503 => self::TEXT_503,
+		504 => self::TEXT_504,
+		505 => self::TEXT_505,
+		511 => self::TEXT_511,
+	];
+
+	/**
+	 * Get the status message from a status code.
+	 *
+	 * @param int|string $code Status code.
+	 * @return string Status message.
+	 */
+	public static function get_text($code) {
+		if (!self::is_valid_code($code)) {
+			throw InvalidArgument::create(1, '$code', 'a valid HTTP status code as an int or numeric string', $code);
+		}
+
+		return self::MAP[$code];
+	}
+
+	/**
+	 * Verify whether a status code is valid.
+	 *
+	 * @param int|string $code Status code to check.
+	 * @return bool Whether the status code is valid.
+	 */
+	public static function is_valid_code($code) {
+		if (!is_int($code) && !is_string($code)) {
+			return false;
+		}
+
+		return array_key_exists($code, self::MAP);
+	}
+}