SDF MCP Server

A Model Context Protocol (MCP) server for working with SQL Server Compact Edition (SDF) database files. This server provides tools to connect to, upgrade, query, and modify SDF databases

Note: This server is Windows-only as it depends on SQL Server Compact Edition, which is a Windows-only database engine.

System Requirements

• Windows operating system
• .NET 9.0 or later
• Visual Studio Code
• SQL Server Compact Edition 4.0 runtime (included in project dependencies)

Features

• Database Connection: Connect to SDF files with optional password protection
• Database Upgrade: Upgrade older SQL Server Compact databases to version 4.0
• Data Query: Execute SELECT queries on any table in the database
• Data Modification: Execute INSERT, UPDATE, and DELETE operations

Setup

1. Make sure you have .NET 9.0 or later installed
2. Clone this repository
3. Build the project:

dotnet build

4. Configure VS Code to use the server by adding this to your .vscode/mcp.json:

{
    "servers": {
        "sdf-mcp": {
            "type": "stdio",
            "command": "dotnet",
            "args": [
                "run",
                "--project",
                "<path-to-project>/sdf_mcp_server/sdf_mcp_server.csproj"
            ]
        }
    }
}

Available Tools

InitConnection

Initializes a connection to an SDF file. "filePath": "path/to/database.sdf", "password": "optional-password"

UpgradeDatabase

Upgrades a database that was created with an earlier version of SQL Server Compact (e.g., Version 3.5).

• Requires running InitConnection first
• No parameters needed
• Database will be upgrade to version 4.0

GetData

Queries data from a specified table.

ModifyData

Modifies data in a specified table using INSERT, UPDATE, or DELETE operations.

Usage Examples

1. Connect to a database: "filePath": "C:\path\to\database.sdf", "password": "optional-password"

2. If you get a version error, upgrade the database using the UpgradeDatabase tool.

3. Query data:

4. Modify data:

Error Handling

The server provides detailed error messages for common issues:

• File not found
• Invalid password
• Database version mismatch
• Invalid queries
• Table not found
• Connection errors

Dependencies

• .NET 9.0
• ModelContextProtocol SDK
• FluentMigrator.Runner.SqlServerCe