Developer · Local MCP server
Roslyn MCP
Local-first MCP server for semantic C# analysis & refactoring via Roslyn & MSBuildWorkspace.
What the MCP Registry states
The entry as published to the official MCP Registry (read 2026-10-04), latest version.
- Registry name
io.github.darylmcd/roslyn-mcp- Version
- 4.3.0
- Status
- Active
- Category
- developer
- Transport
- stdio (local process)
- Package
- NuGet
- Published
- 2026-09-29
- Updated
- 2026-09-29
- Publisher
- darylmcd (GitHub)
- Website
- github.com/darylmcd/Roslyn-Backed-MCP
- Repository
- github.com/darylmcd/Roslyn-Backed-MCP
- Source
- Registry API entry
Packages
| Registry | Package | Version | Transport |
|---|---|---|---|
| NuGetruntime: dnx | Darylmcd.RoslynMcp | 4.3.0 | stdio |
How to connect Roslyn MCP
Roslyn MCP runs locally from a .NET package published to NuGet: Darylmcd.RoslynMcp version 4.3.0. It speaks MCP over stdio, so the client starts it as a program and talks to it through standard input and output. It needs the .NET SDK; run as a .NET tool; the entry names dnx as the runtime. It reads the environment variable ROSLYNMCP_SANCTIONED_ROOTS; set it in the client's configuration for this server.
Derived from the registry entry, not tested here. What the server does, and on what terms, is set by its publisher; check its repository or website before giving it access to your accounts or files. How to add an MCP server to an assistant · Before you connect
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