diff --git a/includes/class-informatiq-sp-google-api.php b/includes/class-informatiq-sp-google-api.php
index a39f7043..e434f4f2 100644
--- a/includes/class-informatiq-sp-google-api.php
+++ b/includes/class-informatiq-sp-google-api.php
@@ -300,13 +300,13 @@ class Informatiq_SP_Google_API {
 			}
 
 			// Fallback: Use product's own price as reference.
-			// Price is nested inside attributes in the new Merchant API.
-			if ( isset( $product['attributes']['price']['amountMicros'] ) ) {
-				$price = (float) $product['attributes']['price']['amountMicros'] / 1000000;
+			// In v1, price is nested inside productAttributes.
+			if ( isset( $product['productAttributes']['price']['amountMicros'] ) ) {
+				$price = (float) $product['productAttributes']['price']['amountMicros'] / 1000000;
 				$this->logger->warning( "No competitive data available for SKU={$sku}, using own price as reference" );
 				return $price;
 			}
-			// Also check top-level price (in case API changes).
+			// Also check top-level price as fallback.
 			if ( isset( $product['price']['amountMicros'] ) ) {
 				$price = (float) $product['price']['amountMicros'] / 1000000;
 				$this->logger->warning( "No competitive data available for SKU={$sku}, using own price as reference (top-level)" );
@@ -326,8 +326,8 @@ class Informatiq_SP_Google_API {
 	 *
 	 * Matching logic:
 	 * 1. SKU matches offerId
-	 * 2. SKU matches gtin (for stores where SKU is the barcode)
-	 * 3. GTIN matches gtin
+	 * 2. SKU matches gtins (for stores where SKU is the barcode)
+	 * 3. GTIN matches gtins
 	 *
 	 * @param string $sku  Product SKU.
 	 * @param string $gtin Product GTIN.
@@ -338,7 +338,8 @@ class Informatiq_SP_Google_API {
 			$page_token = null;
 
 			do {
-				$endpoint = "/products/v1beta/accounts/{$this->merchant_id}/products";
+				// v1 endpoint (v1beta was discontinued on February 28, 2026).
+				$endpoint = "/products/v1/accounts/{$this->merchant_id}/products";
 				$endpoint .= '?pageSize=250';
 
 				if ( $page_token ) {
@@ -354,27 +355,18 @@ class Informatiq_SP_Google_API {
 							return $product;
 						}
 
-						// Check if SKU matches Google's GTIN array (for stores where SKU is the barcode).
-						// GTIN is stored in attributes.gtin as an array.
-						if ( ! empty( $product['attributes']['gtin'] ) && is_array( $product['attributes']['gtin'] ) ) {
-							if ( in_array( $sku, $product['attributes']['gtin'], true ) ) {
-								$this->logger->info( "Product matched by attributes.gtin={$sku} (SKU used as barcode)" );
-								return $product;
-							}
-						}
-
-						// Also check attributes.gtins (alternative field).
-						if ( ! empty( $product['attributes']['gtins'] ) && is_array( $product['attributes']['gtins'] ) ) {
-							if ( in_array( $sku, $product['attributes']['gtins'], true ) ) {
-								$this->logger->info( "Product matched by attributes.gtins={$sku} (SKU used as barcode)" );
+						// In v1, GTIN is stored in productAttributes.gtins as an array.
+						if ( ! empty( $product['productAttributes']['gtins'] ) && is_array( $product['productAttributes']['gtins'] ) ) {
+							if ( in_array( $sku, $product['productAttributes']['gtins'], true ) ) {
+								$this->logger->info( "Product matched by productAttributes.gtins={$sku} (SKU used as barcode)" );
 								return $product;
 							}
 						}
 
 						// Check if separate GTIN parameter matches.
 						if ( ! empty( $gtin ) ) {
-							if ( ! empty( $product['attributes']['gtin'] ) && is_array( $product['attributes']['gtin'] ) ) {
-								if ( in_array( $gtin, $product['attributes']['gtin'], true ) ) {
+							if ( ! empty( $product['productAttributes']['gtins'] ) && is_array( $product['productAttributes']['gtins'] ) ) {
+								if ( in_array( $gtin, $product['productAttributes']['gtins'], true ) ) {
 									$this->logger->info( "Product matched by GTIN parameter={$gtin}" );
 									return $product;
 								}
@@ -404,8 +396,8 @@ class Informatiq_SP_Google_API {
 	 */
 	private function fetch_competitive_price_from_reports( $sku, $gtin ) {
 		try {
-			// Use the Reports API to search for competitive visibility data.
-			$endpoint = "/reports/v1beta/accounts/{$this->merchant_id}/reports:search";
+			// v1 reports endpoint (v1beta was discontinued on February 28, 2026).
+			$endpoint = "/reports/v1/accounts/{$this->merchant_id}/reports:search";
 
 			// Try searching by offer_id first (fields prefixed with product_view.).
 			$query = array(
@@ -465,7 +457,8 @@ class Informatiq_SP_Google_API {
 	 */
 	public function get_price_insights() {
 		try {
-			$endpoint = "/reports/v1beta/accounts/{$this->merchant_id}/reports:search";
+			// v1 reports endpoint (v1beta was discontinued on February 28, 2026).
+			$endpoint = "/reports/v1/accounts/{$this->merchant_id}/reports:search";
 
 			$all_insights = array();
 			$page_token = null;
@@ -566,8 +559,8 @@ class Informatiq_SP_Google_API {
 	 */
 	public function test_connection() {
 		try {
-			// Try to list products to test connection.
-			$endpoint = "/products/v1beta/accounts/{$this->merchant_id}/products?pageSize=1";
+			// v1 endpoint (v1beta was discontinued on February 28, 2026).
+			$endpoint = "/products/v1/accounts/{$this->merchant_id}/products?pageSize=1";
 			$this->api_request( 'GET', $endpoint );
 
 			$this->logger->info( 'Google Merchant API connection test successful' );
@@ -590,7 +583,8 @@ class Informatiq_SP_Google_API {
 			$page_token   = null;
 
 			do {
-				$endpoint = "/products/v1beta/accounts/{$this->merchant_id}/products";
+				// v1 endpoint (v1beta was discontinued on February 28, 2026).
+				$endpoint = "/products/v1/accounts/{$this->merchant_id}/products";
 				$endpoint .= '?pageSize=250';
 
 				if ( $page_token ) {