How do I install the roslyn mcp server?

This profile does not contain a verified copy-paste launch configuration. Follow the current project documentation to confirm the runtime, entry point, transport and authentication before registering it in your client.

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Roslyn MCP Server

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

Local serverstdioPython

What is the Roslyn MCP Server?

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

What it actually does

Local-first MCP (Model Context Protocol) server for semantic C# analysis, navigation, validation, and refactoring on real .sln / .slnx / .csproj workspaces. It uses Roslyn and MSBuildWorkspace, runs over stdio, and does not require Visual Studio.

Loads real C# solutions and projects with session-scoped workspaceIds
Exposes semantic navigation, diagnostics, build/test helpers, and preview/apply refactoring workflows over MCP
Ships as a .NET global tool, a Claude Code plugin, and a source-buildable stdio host
Publishes the authoritative live surface through server_info and roslyn://server/catalog

Configuration

.NET 10 SDK — pinned to 10.0.100 in global.json (rollForward: latestFeature)

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Recorded tools

Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.

Tool	What it does
roslyn	//server/catalog for the machine-readable contract

Configuration

.NET 10 SDK — pinned to 10.0.100 in global.json (rollForward: latestFeature)

Example prompts to try

“Use Roslyn to Updates.”
“Use Roslyn to roslyn.”
“Use Roslyn to Client.”

Frequently asked questions

Local-first MCP server for semantic C# analysis & refactoring via Roslyn & MSBuildWorkspace. Confirm the tools offered by your installed version in the connected client. Tool availability and permissions depend on the server and account configuration.