Architectural Components of MCP
In the previous section, we discussed the key concepts and terminology of MCP. Now, let’s dive deeper into the architectural components that make up the MCP ecosystem. The Model Context Protocol (MCP) is built on a client-server architecture that enables structured communication between AI models and external systems. The MCP architecture consists of three primary components, each with well-defined roles and responsibilities: Host, Client, and Server. We touched on these in the previous section, but let’s dive deeper into each component and their responsibilities. The Host is the user-facing AI application that end-users interact with directly. Examples include: The Host’s responsibilities include: In most cases, users will select their host application based on their needs and preferences. For example, a developer may choose Cursor for its powerful code editing capabilities, while domain experts may use custom applications built in smolagents. The Client is a component within the Host
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