Darko Martinovic McpServer

Supermarket MCP Server

A modern, dual-mode server for supermarket inventory and sales management. Supports both Web API (REST) and console/MCP operation for integration with AI tools like Claude Desktop.

🎬 Demo Video

See the McpServer in action with Claude Desktop integration and Web API functionality:

https://github.com/user-attachments/assets/7675de32-fa05-48e1-9327-8417670e9165

The demo showcases dual-mode operation, MCP tool integration with Claude Desktop, and REST API endpoints.

🆕 Latest Features

Recent Additions:

• API Versioning - All endpoints now use versioned paths (/api/v1/...) for future compatibility
• Unified Tool Proxy - Native .NET tool execution service replacing external middleware
• Articles with Ingredients - New endpoint for retrieving articles with ingredient information from MongoDB
• Custom Plugin Support - Define custom logic to access your database or API through configurable plugins
• Advanced JSON Viewer - Interactive data visualizer with expand/collapse functionality and intelligent formatting
• Enhanced AI Response Tracking - Each AI response now includes detailed metadata:
• Number of tokens used (prompt + completion)
• Estimated cost breakdown
• Tools utilized during processing
• AI model information

Features

• Dual Mode: Run as a Web API (REST endpoints) or as a console MCP tool provider
• API Versioning: URI-based versioning (/api/v1/...) for all endpoints
• Plugin Architecture: Extensible system supporting multiple data sources and operations
• Supermarket Analytics: Inventory, sales, revenue, category, and stock tools (SQL Server)
• ThirdApi Integration: MongoDB-based operations for prices analysis, content statistics, and article ingredients
• Unified Tool Proxy: Execute any MCP tool via a single endpoint with automatic routing
• Resource-like Endpoints: Real-time inventory, daily summaries, detailed product info
• Advanced Analytics: Complex MongoDB aggregation pipelines for data analysis
• Comprehensive Logging: Serilog-based, file and console

Quick Start

Prerequisites

• .NET 9.0+
• SQL Server 2014+ (for Supermarket plugin)
• MongoDB 4.0+ (for ThirdApi plugin, optional)

Setup

1. Database:

• Run Database/SetupDatabase.sql to create tables and sample data

1. Configure:

• Edit appsettings.json with your SQL Server connection string

1. Build:

``bash dotnet build ``

1. Run:

• Web API mode:

``bash dotnet run --webapi # or use your published executable with --webapi ``

• Console/MCP mode:

``bash dotnet run # or use with Claude Desktop/Inspector as shown below ``

Usage

Web API Mode

• Start the server with --webapi
• Base URL: http://localhost:5000
• API Version: v1

Tool Proxy Endpoints (Unified Tool Execution)

• POST /api/v1/tool - Execute any MCP tool by name
• POST /api/v1/search - Search for tools via Azure Cognitive Search
• GET /api/v1/tools/schema - Get all available tool schemas
• GET /api/v1/proxy/health - Tool proxy health check

Supermarket Plugin Endpoints (SQL Server)

• GET /api/v1/supermarket/products - All products
• GET /api/v1/supermarket/products/low-stock?threshold=10 - Low stock products
• GET /api/v1/supermarket/sales?startDate=2025-01-01&endDate=2025-12-31 - Sales data
• GET /api/v1/supermarket/revenue?startDate=2025-01-01&endDate=2025-12-31 - Total revenue
• GET /api/v1/supermarket/inventory/status - Inventory status
• GET /api/v1/supermarket/inventory/detailed - Detailed inventory
• GET /api/v1/supermarket/health - SQL Server health check

ThirdApi Plugin Endpoints (MongoDB)

• GET /api/v1/thirdapi/prices-without-base-item - Prices analysis
• GET /api/v1/thirdapi/latest-statistics - Processing statistics
• GET /api/v1/thirdapi/content-types - Content types summary
• GET /api/v1/thirdapi/articles/search?name=MASTI - Find articles by name
• GET /api/v1/thirdapi/articles/{contentKey} - Find article by content key
• GET /api/v1/thirdapi/articles/ingredients - Articles with ingredients
• GET /api/v1/thirdapi/plu-data - PLU data from SAP Fiori
• GET /api/v1/thirdapi/health - MongoDB health check

Chat Endpoints

• POST /api/v1/chat/message - Process chat message with AI
• GET /api/v1/chat/functions - Get available AI functions

Health & Documentation

• GET /health - General system health check
• GET /swagger - Swagger UI API documentation

MCP Tool Provider Mode

• Start the server without --webapi
• Integrate with Claude Desktop or MCP Inspector
• Example Claude config (claude_desktop_config.json):

``json { "mcpServers": { "supermarket": { "command": "dotnet", "args": ["run", "--project", "/path/to/your/McpServer", "--no-build"] } } } ``

• Config file location: C:\Users\\AppData\Roaming\Claude

Configuration

Database Connections

• SQL Server (Supermarket Plugin): Edit appsettings.json:

``json { "ConnectionStrings": { "DefaultConnection": "Server=your-server;Database=your-db;Integrated Security=true;TrustServerCertificate=true;" } } ``

• MongoDB (ThirdApi Plugin): Default connection to mongodb://localhost:27017/ThirdApi
• Connects to ThirdApi database
• Uses Pump collection for article and price data
• Uses Summary collection for statistics

Claude Desktop Integration

• Claude Desktop: See above for config example and file location

Plugin Architecture

The server supports a plugin-based architecture allowing multiple data sources:

• Supermarket Plugin: SQL Server-based inventory and sales management
• ThirdApi Plugin: MongoDB-based price analysis, content statistics, and article ingredients
• Extensible Design: Easy to add new plugins for additional data sources

Each plugin provides:

• MCP tools for AI integration
• REST API endpoints for web clients
• Health monitoring and logging
• Independent data service layer

API Versioning

All API endpoints use URI-based versioning:

/api/v1/supermarket/products
/api/v1/thirdapi/articles/ingredients
/api/v1/tool

• Default Version: v1.0
• Version Header: API responses include api-supported-versions header
• Future Versions: New versions (v2, v3) can be added without breaking existing clients

Troubleshooting & Logs

• Logs: Logs/mcpserver.log (file), console output
• Common issues: Check connection string, database setup, and logs for errors
• For MCP/Claude issues: Ensure config file is correct and restart the app after changes

Postman Collection

Import the Postman collection and environment from the postman/ folder:

• McpServer-Collection.json - All API endpoints
• McpServer-Environment.json - Environment variables (protocol, host, port, api_version)

📄 License

MIT License - see LICENSE file for details.

⚠️ Disclaimer

This project was developed independently on personal equipment and in personal time. It is not affiliated with, endorsed by, or derived from the intellectual property of EPAM Systems or any of its clients. All examples, configurations, and data are generic and intended solely for demonstration and educational purposes.

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For more details, see the code and comments. Contributions welcome!

Source & license

This open-source MCP server is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: Darko-Martinovic
• Source: Darko-Martinovic/McpServer
• License: MIT

Install and usage instructions live in the source repository linked above.