diff --git a/.changeset/fix-undefined-context-key.md b/.changeset/fix-undefined-context-key.md
new file mode 100644
index 000000000..f8bc49475
--- /dev/null
+++ b/.changeset/fix-undefined-context-key.md
@@ -0,0 +1,5 @@
+---
+"@headstartwp/headstartwp": patch
+---
+
+Fix: Add null coalescing check for context parameter in extend_post_content to prevent PHP 8+ "Undefined array key" warning. Fixes #940
diff --git a/wp/headless-wp/includes/classes/Integrations/Gutenberg.php b/wp/headless-wp/includes/classes/Integrations/Gutenberg.php
index cf6f50848..6b3525967 100644
--- a/wp/headless-wp/includes/classes/Integrations/Gutenberg.php
+++ b/wp/headless-wp/includes/classes/Integrations/Gutenberg.php
@@ -87,7 +87,7 @@ public function extend_post_content( \WP_REST_Response $data, \WP_Post $post, \W
 
 		$params = $request->get_params();
 
-		if ( 'view' !== $params['context'] ) {
+		if ( 'view' !== ( $params['context'] ?? '' ) ) {
 			return $data;
 		}