The Model Context Protocol (MCP) is an open protocol designed to enhance the integration of AI applications with SaaS tools by providing a standardized interface for agents to discover, access, and invoke external tools across various platforms. It operates on a client-server architecture, where MCP Servers expose capabilities as standardized tools, and MCP Clients—often embedded in AI applications—connect to these servers to utilize the available tools. This modularity allows for dynamic tool addition without altering the AI applications. MCP enables AI agents to orchestrate workflows across multiple SaaS applications, adapt to new integrations, and deliver a seamless, action-oriented user experience, addressing the modern expectation of effortless software interoperability. The Membrane MCP Server serves as a practical, open-source implementation of this protocol, offering features such as dynamic tool selection, session management, and secure access, thereby simplifying the process for developers and product teams to scale integrations without additional engineering efforts.