Excessive Agency in AI systems, where over-permissioned agents can execute harmful actions, poses significant security risks, particularly as AI advances with agentic workflows powered by large language models (LLMs). Lunar.dev's AI Gateway offers a scalable solution by providing real-time controls and centralized enforcement to secure AI applications, effectively managing vulnerabilities tied to Excessive Agency. This vulnerability arises when AI agents, driven by LLMs, are granted excessive functionality, permissions, or autonomy, allowing them to perform unauthorized or harmful actions. Traditional methods to mitigate these risks, like limiting functionality and enforcing permissions, often fall short due to their reliance on developers to anticipate vulnerabilities. In contrast, an AI Gateway acts as a centralized control point, ensuring consistent enforcement of security standards across all agents by governing LLM traffic and agent actions. By integrating features such as rate limiting, priority queuing, domain access controls, and custom metrics, Lunar.dev's AI Gateway aligns with OWASP's prevention strategies, providing a robust defense against the growing threat of Excessive Agency in LLM-powered AI systems.