HR MCP Server

# HR MCP Server Architecture This document provides a high-level overview of the HR MCP Server architecture using diagrams. ## System Design The following diagram shows the system architecture of the HR MCP Server and how it integrates with Claude: ```mermaid graph TD subgraph "HR MCP Server" A[Claude LLM] -- "Requests Tools/Prompts" --> B[MCP Transport Layer] B -- "JSON-RPC" --> C[MCP Server] subgraph "Core Server Components" C --> D[Tools Manager] C --> E[Prompts Manager] C --> F[Logging System] end subgraph "Tools Implementation" D --> G[get_employee_info] D --> H[search_employees] D --> I[request_global_leave] end subgraph "Prompts Implementation" E --> J[translate_text] end subgraph "Data Layer" K[(Employee Database)] G --> K H --> K I --> K end subgraph "Input Validation" L[Zod Schema Validation] G --> L H --> L I --> L J --> L end end M[Claude Desktop] -- "StdIO" --> A ``` ## Component Details ### Tools - **get_employee_info**: Retrieves detailed employee information by ID - **search_employees**: Advanced search functionality with filtering and sorting - **request_global_leave**: Processes employee leave requests across multiple countries ### Prompts - **translate_text**: HCM-aware translation with specialized terminology handling ### Data Layer The system uses an in-memory employee database with synthetic HR data. In a production environment, this would be replaced with a proper database system. ### Validation All inputs are validated using Zod schemas to ensure type safety and proper error handling. ## Communication Flow 1. Claude Desktop connects to the MCP Server via StdIO transport 2. Claude LLM sends tool or prompt requests via the MCP protocol 3. The MCP Server processes requests through the appropriate tool or prompt handler 4. Tool handlers query the employee database and format responses 5. Prompt handlers generate language model instructions 6. Responses are returned to Claude through the transport layer 7. Logging occurs at key points with JSON-RPC formatted messages