{"status":"error","message":"Invalid action or missing parameters","available_actions":{"check_license":"GET - Check license validity for domain","get_license":"GET - Get license details","get_user_licenses":"GET - Get all licenses for a user","create_license":"POST - Create new license","update_license":"POST - Update license details","validate_domain":"GET - Validate domain for license"},"usage_examples":{"check_license":"?action=check_license&license_key=LIC-XXXXX&domain=example.com","get_license":"?action=get_license&license_key=LIC-XXXXX","get_user_licenses":"?action=get_user_licenses&user_id=123","create_license":"POST: action=create_license&user_id=123&company_id=456&package_id=789&max_domains=5&domain=example.com","update_license":"POST: action=update_license&license_key=LIC-XXXXX&status=inactive","validate_domain":"?action=validate_domain&license_key=LIC-XXXXX&domain=example.com"}}