LeaveManager MCP Server

A Model Context Protocol (MCP) server for managing employee leave requests, balances, and history. This server provides a simple and efficient way to handle leave management operations through standardized API endpoints.

Features

• Leave Balance Management: Check remaining leave days for employees
• Leave Application: Apply for leave on specific dates
• Leave History: View complete leave history for employees
• Date Range Support: Apply for multiple consecutive or non-consecutive leave dates
• Real-time Balance Updates: Automatic balance updates after leave applications

Available Functions

1. Get Leave Balance

Check the remaining leave days for a specific employee.

{
  "function": "get_leave_balance",
  "parameters": {
    "employee_id": "string"
  }
}

Response: Returns the number of leave days remaining for the employee.

2. Apply Leave

Submit a leave application for specific dates.

{
  "function": "apply_leave",
  "parameters": {
    "employee_id": "string",
    "leave_dates": ["2025-06-03", "2025-06-04"]
  }
}

Response: Confirms leave application and returns updated balance.

3. Get Leave History

Retrieve the complete leave history for an employee.

{
  "function": "get_leave_history",
  "parameters": {
    "employee_id": "string"
  }
}

Response: Returns chronological list of all leave applications and their status.

Usage Examples

Check Leave Balance

curl -X POST http://localhost:3000/mcp \
  -H "Content-Type: application/json" \
  -d '{
    "method": "get_leave_balance",
    "params": {
      "employee_id": "E001"
    }
  }'

Apply for Single Day Leave

curl -X POST http://localhost:3000/mcp \
  -H "Content-Type: application/json" \
  -d '{
    "method": "apply_leave",
    "params": {
      "employee_id": "E001",
      "leave_dates": ["2025-06-03"]
    }
  }'

Apply for Multiple Days Leave

curl -X POST http://localhost:3000/mcp \
  -H "Content-Type: application/json" \
  -d '{
    "method": "apply_leave",
    "params": {
      "employee_id": "E001",
      "leave_dates": ["2025-06-03", "2025-06-04", "2025-06-05"]
    }
  }'

Date Format

All dates should be provided in ISO 8601 format: YYYY-MM-DD

Examples:

• 2025-06-03 (June 3rd, 2025)
• 2025-12-25 (December 25th, 2025)

Error Handling

The server provides detailed error responses for common scenarios:

• Invalid Employee ID: Returns error if employee doesn't exist
• Insufficient Leave Balance: Prevents leave application if insufficient days remaining
• Invalid Date Format: Returns error for malformed dates
• Past Date Application: Prevents application for dates in the past
• Duplicate Leave Application: Prevents applying for already approved dates

API Response Format

Success Response

{
  "success": true,
  "data": {
    "message": "Leave applied for 1 day(s). Remaining balance: 17."
  }
}

Error Response

{
  "success": false,
  "error": {
    "code": "INSUFFICIENT_BALANCE",
    "message": "Insufficient leave balance. Required: 3, Available: 2"
  }
}

License

This project is licensed under the MIT License - see the LICENSE file for details.

Changelog

v1.0.0

• Initial release
• Basic leave management functionality
• Employee balance tracking
• Leave application system
• Leave history retrieval

Note: This is an MCP (Model Context Protocol) server designed to work with AI assistants and automation tools.