Invariant Explorer, accessible at explorer.invariantlabs.ai, is an open-source observability tool designed to help developers visualize, debug, and analyze AI agent behavior through trace data. It provides an intuitive interface for inspecting agent traces, allowing users to identify anomalies, annotate critical decision points, and collaborate effectively. Explorer supports both managed cloud and self-hosted deployments, offering flexibility for various development environments. By integrating with the Invariant SDK or Gateway, developers can upload traces for analysis, facilitating a deeper understanding of agent performance and aiding in the development of robust AI systems.