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roslyn-mcp

io.github.darylmcd/roslyn-mcp

Source code

About roslyn-mcp

roslyn-mcp is an MCP server published by the GitHub account darylmcd. Local-first MCP server for semantic C# analysis & refactoring via Roslyn & MSBuildWorkspace.

It runs on your own machine: your AI client starts it from the NuGet package Darylmcd.RoslynMcp at version 4.3.0.

It asks for no keys or passwords.

Version 4.3.0 was published on 29 September 2026, and the source code is public, so you can read it before installing.

Written from the registry entry. 7 automated checks on registry metadata: 4 pass, 0 warn, 0 fail, 3 info. How we check.

What it asks for

VariableRequiredSecretDescription
ROSLYNMCP_SANCTIONED_ROOTSNoNoServer-owned filesystem boundary for path validation and solution discovery. Path-separator-delimited (';' on Windows, ':' on macOS/Linux). '.' scopes the server to its working directory. An empty value fails closed: every path-taking tool rejects its input.

Checks

CheckResultDetail
Source repository linkedPasshttps://github.com/darylmcd/Roslyn-Backed-MCP
Version pinnedPassEvery package has an explicit version
Secrets requestedInfoAsks for no secrets
Known package registryPassAll packages come from npm, PyPI, OCI, NuGet or MCPB
Namespace ownershipInfoName verified via GitHub account darylmcd
Registry text aimed at the AIPassDescription and settings contain no hidden characters or instructions to the AI
Code red flagsInfonuget packages are not read yet

Popularity & health: 63 / 100

Worked out from public numbers and our own checks, not from user reviews or ratings. It says how used and how looked-after a server is, not whether it is safe.

Popularity3 / 40

1 GitHub stars, no download count, no Hacker News posts found. Best two of the three, each on a log scale.

Activity25 / 25

Last push 2026-10-29, last release 2026-05-06, 765 commits in 90 days.

Issue health15 / 15

71 closed of 71 issues.

Our checks20 / 20

0 warnings, each costing a fifth.

1 forks, 1,802 merged pull requests. Sources: GitHub, npm, PyPI (pypistats.org) and Hacker News (Algolia), fetched 2026-10-31.

What people say

No Hacker News threads link to its source code.

Look further: search Reddit, search Hacker News, read its GitHub issues. These are not reviews we checked.

Facts

Registry nameio.github.darylmcd/roslyn-mcp
PublisherGitHub account darylmcd
How the name is verifiedName verified via GitHub account darylmcd. The registry ties the name prefix to that account or domain; it does not check the code.
TypeLocal: runs on your machine from a package
Packagesnuget Darylmcd.RoslynMcp 4.3.0 (stdio)
Version4.3.0
Published
Last updated
Source repositoryhttps://github.com/darylmcd/Roslyn-Backed-MCP
Websitehttps://github.com/darylmcd/Roslyn-Backed-MCP
CategoryOther (assigned by keyword rule, not by hand)

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