SharpLS.MCP

MCP server that wraps roslyn-language-server to provide C# code intelligence tools.

Requirements

• .NET 10
• roslyn-language-server installed globally: dotnet tool install -g roslyn-language-server --prerelease

Usage

Pass the solution/project path as a CLI argument:

SharpLS.MCP.exe /path/to/MyProject.slnx

Or use load_solution tool at runtime to load/switch solutions.

Claude MCP config

{
  "mcpServers": {
    "SharpLS": {
      "command": "dotnet",
      "args": ["run", "--project", "/path/to/SharpLS.MCP", "--", "/path/to/MyProject.slnx"]
    }
  }
}

Or using a pre-built binary:

{
  "mcpServers": {
    "SharpLS": {
      "command": "/path/to/SharpLS.MCP/bin/Debug/net10.0/SharpLS.MCP.exe",
      "args": ["/path/to/MyProject.slnx"]
    }
  }
}

Environment variables

Variable	Description
SHARPLSMCP_TIMEOUT	LSP request timeout in seconds (default: 60)

Tools

Navigation

Tool	Description
find_definition	Find the definition of a symbol by name in a file
find_references	Find all references to a symbol across the workspace
get_hover	Get hover documentation and type info for a symbol
find_document_symbols	List all symbols defined in a C# file
find_workspace_symbols	Search for symbols across the entire workspace
go_to_implementation	Find implementations of an interface or abstract method
go_to_type_definition	Jump to the type definition of a symbol

Hierarchy

Tool	Description
incoming_calls	Find all functions/methods that call the specified symbol
outgoing_calls	Find all functions/methods called by the specified symbol
supertypes	Find base types and interfaces of a type
subtypes	Find derived types and implementations of a type
type_hierarchy	Show full inheritance chain from a type up to its root base type

Editing & Diagnostics

Tool	Description
get_diagnostics	Get compiler errors and warnings for a file without building
get_workspace_diagnostics	Get errors and warnings across the entire workspace/solution
rename_symbol	Rename a symbol across the workspace and apply changes to disk
format_document	Format a file (or line range) using project formatting rules

Code Actions

Tool	Description
get_code_actions	List available quick fixes and refactorings for a line or range
apply_code_action	Apply a code action by title (quick fix, refactoring, etc.)

IntelliSense

Tool	Description
get_completion	Get code completion suggestions at a symbol position
get_signature_help	Get method signature overloads and parameter info

Lifecycle

Tool	Description
load_solution	Load a solution or project file (.sln/.slnx/.csproj)
restart_lsp	Restart the language server