This project is a Node.js implementation of the Model Context Protocol (MCP) server for Microsoft SQL Server databases. It exposes database tables as resources and provides tools to execute SQL queries and retrieve table schemas. The server supports automatic configuration mode detection and can operate in either single-database mode (configured with MSSQL_SERVER, MSSQL_DATABASE, etc.) or multi-database mode (configured with MSSQL_<DBNAME>_* variables for multiple databases). At runtime, it auto-detects the active mode and exposes the same MCP REST/STDIO interface in both modes. In multi-database mode, any database names can be used following the MSSQL_<YOUR_CUSTOM_NAME>_* pattern; databases are exposed under lowercase keys (e.g., analytics, customers). If no dbKey is provided in a request, the server uses the first configured database alphabetically. The project also includes an Express HTTP API for local testing, alongside the MCP STDIO mode for integration with clients like Claude Desktop or VS Code. It leverages Zod for input validation, uses parameterized queries for security, and provides tooling to manage resources, execute SQL, and obtain table schemas.