{ "code": "woocommerce_rest_authentication_error", "message": "Consumer key is invalid.", "data": { "status": 401 } } Used WAMP & XAMPP local servers Steps followed for troubleshooting: Enable the legacy REST API is checked I have made new rest api and applied the same consumer key I created new admin and tried I replace htaccess with default wordpress I have upgrade both wordpress and woocommerce version to latest I have disabled all other plugins Used OAuth 1.0. Just added the consumer key and consumer secret and send the request I still haven't solved the issue.