Open Source PrismGuard: AI API Transparent Proxy and Intelligent Audit Middleware

PrismGuard is an open source intelligent middleware designed specifically for AI APIs, featuring a non-intrusive transparent proxy architecture that enables seamless integration by simply modifying the base_url. This tool addresses the four core challenges enterprises face when using AI APIs: hierarchical intelligent risk control achieves efficient content moderation through hybrid strategies (keyword matching, local lightweight models, LLM review); heterogeneous protocol conversion supports format conversion between mainstream models like OpenAI, Claude, and Gemini; streaming response air defense mechanism prevents clients from receiving invalid content; zero-code intrusion design decouples business logic from risk control strategies. Its intelligent audit process includes four key components: cache-first approach, sampling freshness, hierarchical adjudication, and automatic evolution, forming a closed-loop optimization mechanism that continuously improves audit accuracy over time. The open source release of PrismGuard provides enterprises using AI APIs with an efficient, low-cost interface governance solution.