Deploying applications that use Large Language Models (LLMs) pose significant challenges in cost control and access management. Current solutions lack granularity and overlook essential budget management features. This article introduces LLMetrics, a purpose-built LLM API gateway addressing these shortcomings. Unlike traditional gateways or observability platforms, LLMetrics offers detailed user-level tracking, robust access controls, and simplified management, ensuring secure and efficient LLM deployment for businesses of all sizes.