To validate incoming webhooks from Zoom, add the following code snippet towards the end of your child theme’s functions.php. Please make sure you update the snippet with your App secret token.
/** * Snippet to validate incoming webhooks from Zoom. */ add_filter( 'rest_request_after_callbacks', 'automator_validate_zoom_webhook', 10, 3 ); function automator_validate_zoom_webhook( $response, $handler, $request ) { $app_secret_token = 'replace_with_your_app_secret_token'; // <<< Update this value $request_params = $request->get_json_params(); if ( empty( $request_params['event'] ) ) { return $response; } if ( 'endpoint.url_validation' !== $request_params['event'] ) { return $response; } if ( empty( $request_params['payload']['plainToken'] ) ) { return $response; } $plain_token = $request_params['payload']['plainToken']; $encrypted_token = hash_hmac( 'sha256', $plain_token, $app_secret_token ); $response_body = array( 'plainToken' => $plain_token, 'encryptedToken' => $encrypted_token ); $response = new WP_REST_Response( $response_body, 200 ); return $response; }
To get the app secret token, find your app in the list here and then go to the “Feature” tab.