Alibaba Cloud Web Application Firewall (WAF) is a fully managed Web Application and API Protection (WAAP) security solution that integrates web application protection, bot management, and API security. It defends against common web attacks such as SQL injection and cross-site scripting (XSS), and provides multi-dimensional protection using Alibaba Cloud-developed rules, AI-based deep learning, proactive protection rules, and exclusive network-wide threat intelligence. The service supports bot detection and mitigation across web applications, mobile apps, and mini-programs, and includes API asset auto-discovery to identify endpoints, detect security risks, and manage full API lifecycle security. Additional capabilities include data leak prevention, web tamper proofing, account risk detection, HTTP flood attack mitigation, anti-scanning and anti-detection, and custom protection rules. WAF supports multi-scenario deployment across public clouds, hybrid clouds, and on-premises data centers, covering both Alibaba Cloud and third-party cloud environments. It provides full web access log recording with real-time SQL-based querying and custom alerting. The service complies with classified protection requirements and PCI DSS standards. WAF is available in multiple global regions including mainland China, Hong Kong, Singapore, Malaysia, the US, Germany, Indonesia, UAE, and Japan. It is a commercial product offered via subscription and pay-as-you-go pricing models, with promotional pricing available for new users.