diff --git a/qm-plugins/qm-limited-header-php-errors/output/headers/php-errors.php b/qm-plugins/qm-limited-header-php-errors/output/headers/php-errors.php
new file mode 100644
index 0000000000..b4b085a590
--- /dev/null
+++ b/qm-plugins/qm-limited-header-php-errors/output/headers/php-errors.php
@@ -0,0 +1,118 @@
+<?php
+/**
+ * PHP error output for HTTP headers.
+ *
+ * @package query-monitor
+ */
+
+declare(strict_types=1);
+
+if ( ! defined( 'ABSPATH' ) ) {
+	exit;
+}
+
+class QM_Output_Headers_Limited_PHP_Errors extends QM_Output_Headers {
+
+	/**
+	 * Collector instance.
+	 *
+	 * @var QM_Collector_PHP_Errors Collector.
+	 */
+	protected $collector;
+
+	/**
+	 * @return array<string, mixed>
+	 */
+	public function get_output() {
+		/** @var QM_Data_PHP_Errors $data */
+		$data    = $this->collector->get_data();
+		$headers = array();
+
+		if ( empty( $data->errors ) ) {
+			return array();
+		}
+
+		$count = 0;
+
+		foreach ( $data->errors as $type => $errors ) {
+
+			foreach ( $errors as $error_key => $error ) {
+
+				// phpcs:ignore Universal.Operators.DisallowStandalonePostIncrementDecrement.PostIncrementFound
+				$count++;
+
+				$stack = array();
+
+				if ( ! empty( $error['filtered_trace'] ) ) {
+					$stack = array_column( $error['filtered_trace'], 'display' );
+				}
+
+				$output_error = array(
+					'key'       => $error_key,
+					'type'      => $error['type'],
+					'message'   => $error['message'],
+					'file'      => QM_Util::standard_dir( $error['file'], '' ),
+					'line'      => $error['line'],
+					'stack'     => $stack,
+					'component' => $error['component']->name,
+				);
+
+				$key             = sprintf( 'error-%d', $count );
+				$headers[ $key ] = json_encode( $output_error ); // phpcs:ignore WordPress.WP.AlternativeFunctions.json_encode_json_encode
+
+			}
+		}
+
+		// VIP: hack to avoid failed requests due to headers being too large
+		// these are subject to change at any time
+		// All of the values are padded to make sure failsafe is triggered earlier
+		$max_header_length       = 10 * 1024;  // padded
+		$max_total_header_length = 30 * 1024;  // padded
+		$max_total_headers       = 50;        // padded
+
+		$current_headers_length = strlen( join( "\n", headers_list() ) );
+		$current_headers_count  = count( headers_list() );
+
+		// Any single header too long, truncate it
+		foreach ( $headers as $key => $value ) {
+			if ( strlen( $value ) + strlen( $key ) > $max_header_length ) {
+				$headers[ $key ] = substr( $value, 0, $max_header_length );
+			}
+		}
+
+		// Too many headers, slice the array
+		if ( $current_headers_count + $count > $max_total_headers ) {
+			$headers = array_slice( $headers, 0, $max_total_headers - $current_headers_count );
+		}
+
+		// Wholesale remove QM error headers if we're still over the limit
+		$max_qm_headers_length = $max_total_header_length - $current_headers_length;
+		if ( strlen( join( "\n", $headers ) ) > $max_qm_headers_length ) {
+			$headers = [ 'errors-truncated' => 'Too many errors, check your Application performance monitor for details.' ];
+		}
+		// End VIP Hack
+
+		return array_merge(
+			array(
+				'error-count' => $count,
+			),
+			$headers
+		);
+	}
+}
+
+/**
+ * @param array<string, QM_Output> $output
+ * @param QM_Collectors $collectors
+ * @return array<string, QM_Output>
+ * phpcs:disable Generic.CodeAnalysis.UnusedFunctionParameter.FoundAfterLastUsed,Universal.Files.SeparateFunctionsFromOO.Mixed
+ */
+function vip_register_qm_output_headers_php_errors( array $output, QM_Collectors $collectors ) {
+	$collector = QM_Collectors::get( 'php_errors' );
+	if ( $collector ) {
+		$output['php_errors'] = new QM_Output_Headers_Limited_PHP_Errors( $collector );
+	}
+	return $output;
+}
+
+add_filter( 'qm/outputter/headers', 'vip_register_qm_output_headers_php_errors', 111, 2 );
diff --git a/query-monitor.php b/query-monitor.php
index 9b5d9492d5..4f55ecb560 100644
--- a/query-monitor.php
+++ b/query-monitor.php
@@ -107,6 +107,10 @@ function wpcom_vip_qm_require() {
 	if ( file_exists( __DIR__ . '/qm-plugins/qm-db-connections/qm-db-connections.php' ) ) {
 		require_once __DIR__ . '/qm-plugins/qm-db-connections/qm-db-connections.php';
 	}
+
+	if ( file_exists( __DIR__ . '/qm-plugins/qm-limited-header-php-errors/output/headers/php-errors.php' ) ) {
+		require_once __DIR__ . '/qm-plugins/qm-limited-header-php-errors/output/headers/php-errors.php';
+	}
 }
 add_action( 'plugins_loaded', 'wpcom_vip_qm_require', 1 );