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MCP System Architecture

Component Diagram

graph TD
    User[User] -->|Query| Client[MCP Client]
    Client -->|Process Query| LLM[Claude LLM]
    Client -->|Tool Calls| Server[MCP Server]
    Server -->|Tool Results| Client
    LLM -->|Response| Client
    Client -->|Final Response| User

    subgraph MCP Client
        ClientSession[Client Session]
        StdioTransport[Stdio Transport]
        AnthropicClient[Anthropic Client]
    end

    subgraph MCP Server
        ToolRegistry[Tool Registry]
        ToolExecutor[Tool Executor]
    end
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Component Descriptions

MCP Client

  • ClientSession: Manages the connection and communication with the MCP Server
  • StdioTransport: Handles standard input/output communication with the server
  • AnthropicClient: Interfaces with Claude LLM for processing queries and tool selection

MCP Server

  • ToolRegistry: Maintains a list of available tools and their descriptions
  • ToolExecutor: Executes the actual tool calls and returns results

Claude LLM

  • Processes user queries
  • Determines which tools to use
  • Generates responses based on tool results

Communication Flow

  1. User sends a query to the MCP Client
  2. Client forwards the query to Claude LLM
  3. LLM processes the query and may request tool usage
  4. Client makes tool calls to the MCP Server
  5. Server executes tools and returns results
  6. Results are sent back to LLM for further processing
  7. Final response is returned to the user

Key Features

  • Asynchronous communication between components
  • Tool-based interaction with the server
  • Support for both Python and JavaScript server implementations
  • Environment variable configuration via .env file
  • Interactive chat loop for user interaction