Roslyn Code Analysis

Provides C# code analysis, symbol usage lookup, and project-context diagnostics using Roslyn.

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22

GitHub Stars

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Language

6 months ago

First Indexed

2 months ago

Catalog Refreshed

Documentation & install

Readme and setup notes from the catalogue, plus a client-ready config you can copy for your MCP host.

Installation

Add the following to your MCP client configuration file.

Configuration

View docs

{
  "mcpServers": {
    "egorpavlikhin-roslyn-mcp": {
      "command": "dotnet",
      "args": [
        "run",
        "--no-build",
        "--project",
        "E:/Source/roslyn-mcp/RoslynMCP/RoslynMCP/RoslynMCP.csproj"
      ]
    }
  }
}

You run a Roslyn-based MCP Server that analyzes C# code, validates syntax and semantic issues, finds symbol usages, and runs Microsoft-recommended code analyzers within your .NET projects. It helps you validate files in their project context and quickly locate references across a codebase, making static analysis and code quality checks faster and repeatable.

How to use

You interact with the Roslyn Code Analysis MCP Server through an MCP client. Start the server locally, then issue commands to validate C# files, locate symbol usages, and run analyzers within your project context. Use the provided tools to ensure your code is syntactically correct, semantically sound, and aligned with Microsoft’s code analysis recommendations. The server returns diagnostics that include syntax errors, semantic issues, and analyzer warnings so you can fix problems before compilation.

How to install

Prerequisites you need before installing and running the server:

.NET SDK
MSBuild tools
Roslyn analyzers NuGet packages (will be loaded if available)

How to install

# 1) Build the Roslyn MCP project (adjust path if needed)
# If you have the project on disk, navigate there first
cd /path/to/RoslynMCP

# 2) Run the MCP server with the explicit project path
# This starts the server and it will listen for MCP commands via standard I/O

dotnet run --no-build --project E:/Source/roslyn-mcp/RoslynMCP/RoslynMCP/RoslynMCP.csproj
```},

Additional sections

Configuration and purpose: The server is configured to operate as a stdio MCP server. It uses the Roslyn CodeAnalysis libraries to validate C# files, locate symbol usages, and analyze code with standard analyzers within project contexts. The supported tools are:

ValidateFile: Validates a C# file using Roslyn and runs code analyzers
FindUsages: Finds all references to a symbol at a specified position

Example workflow

Start the server using the runtime command described in the installation steps.
Submit a C# file for validation with analyzers enabled.
Request all usages of a symbol at a given file position to understand its references across the project.
Review the diagnostic output to address syntax, semantic, and analyzer warnings.

Available tools

ValidateFile

Validates a C# file using Roslyn and runs code analyzers, returning syntax, semantic, and analyzer diagnostics.

FindUsages

Finds all references to a symbol at a specified position in a C# file, showing usages across the project.