Model Context Protocol (MCP) is an open protocol designed to enable AI agents to interact with external tools and data in a standardized way. MCP is composed of three components: server , client , and host . MCP host The MCP host acts as the interface between the user and the agent (such as Claude Desktop or IDE) and plays the role of connecting to external tools or data through MCP clients and servers. Previously, Anthropic’s Claude Desktop was introduced as a host, but it required a separate desktop app, license, and API key management, leading to dependency on the Claude ecosystem. mcp-use is an open-source Python/Node package that connects LangChain LLMs (e.g., GPT-4, Claude, Groq) to MCP servers in just six lines of code, eliminating dependencies and supporting multi-server and multi-model setups. MCP Client The MCP client manages the MCP protocol within the host and is responsible for connecting to MCP servers that provide the necessary functions for the ...
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