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mcp/harbor
Claude Desktop

roslyn mcp for Claude Desktop

io.github.darylmcd/roslyn-mcp

Local-first MCP server for semantic C# analysis & refactoring via Roslyn & MSBuildWorkspace.

client:Claude Desktop transport:stdio runtime:nuget

Install roslyn mcp in Claude Desktop

~/Library/Application Support/Claude/claude_desktop_config.json · windows: %APPDATA%\Claude\claude_desktop_config.json

Held in this page only — never stored, logged, or sent anywhere but back to your screen. 

{
  "mcpServers": {
    "roslyn-mcp": {
      "command": "dnx",
      "args": [
        "Darylmcd.RoslynMcp",
        "--yes"
      ],
      "env": {
        "ROSLYNMCP_SANCTIONED_ROOTS": "<ROSLYNMCP_SANCTIONED_ROOTS>"
      }
    }
  }
}

Settings → Developer → Edit Config opens this file. Restart the app after saving. Claude Desktop docs

roslyn mcp in other clients

roslyn mcp MCP server