Psi is an advanced Model Context Protocol (MCP) server engineered for in-depth quantum systems analysis and simulation. It offers a comprehensive suite of tools for researchers and and developers working in quantum computing, quantum chemistry, many-body physics, quantum machine learning, and quantum field theory, enabling the creation, simulation, and optimization of complex quantum systems and experiments. With its modular architecture and Smithery compatibility, Psi provides a powerful platform for exploring the frontiers of quantum science.