Dotnetdevmcp MCP server

DotNetDevMCP

<!-- mcp-name: io.github.csa7mdm/dotnetdevmcp -->

An MCP server that gives AI coding agents real .NET tooling: Roslyn code intelligence, dotnet build/test, git, and an orchestrator that runs those tools concurrently as a dependency graph.

Agents working on .NET code usually get by with grep and shelling out to dotnet. That means they read files instead of symbols, edit text instead of syntax trees, and run one command at a time. DotNetDevMCP replaces that with 53 tools that use the compiler's view of your solution and can run builds, tests and analysis in parallel.

Install

Requires the .NET 10 SDK.

Claude Code

claude mcp add dotnetdevmcp -- dnx DotNetDevMCP --yes

VS Code / Visual Studio (.mcp.json or .vscode/mcp.json)

{
  "servers": {
    "dotnetdevmcp": {
      "type": "stdio",
      "command": "dnx",
      "args": ["DotNetDevMCP", "--yes"]
    }
  }
}

Claude Desktop / Cursor / any stdio client (mcpServers form)

{
  "mcpServers": {
    "dotnetdevmcp": {
      "command": "dnx",
      "args": ["DotNetDevMCP", "--yes", "--", "--load-solution", "C:/src/MyApp/MyApp.sln"]
    }
  }
}

dnx downloads the package from NuGet.org on first run. Prefer a permanent install? dotnet tool install -g DotNetDevMCP, then use dotnetdevmcp as the command.

Pass --load-solution to have Roslyn load your solution at startup, or let the agent call SharpTool_LoadSolution when it needs to. --http --port 3001 serves Streamable HTTP instead of stdio. dotnetdevmcp --help lists everything.

By default, the Roslyn edit tools (SharpToolRenameSymbol, OverwriteMember, AddMember, MoveMember, FindAndReplace, CreateRoslynDocument, OverwriteRoslynDocument, ManageUsings, ManageAttributes) never touch git - they apply changes to disk and return the usual compile-check output, nothing else. Pass --git-commit-edits to opt into the old behavior: each edit creates a sharptools/ branch (if you aren't already on one) and commits the change, which is also what SharpToolUndo needs in order to revert. Without the flag, SharpTool_Undo returns an explanatory error instead of failing obscurely. (--disable-git still exists but is a no-op now that git integration is opt-in by default.)

What the agent gets

Shortened. The full README is on GitHub.