BifrostMCP

v1.0.0Developer Toolsstable

VSCode Extension with an MCP server that exposes semantic tools like Find Usages and Rename to LLMs

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What is BifrostMCP?

BifrostMCP is a Model Context Protocol (MCP) server that allows AI assistants like Claude, Cursor, and VS Code to vscode extension with an mcp server that exposes semantic tools like find usages and rename to llms

VSCode Extension with an MCP server that exposes semantic tools like Find Usages and Rename to LLMs

This server falls under the Developer Tools category on MCPgee, the world's largest MCP server directory with 33,000+ servers.

Features

  • VSCode Extension with an MCP server that exposes semantic to

Use Cases

Use semantic tools like find usages and rename.
Enable code refactoring with LLM assistance.
Support language-aware code analysis.
biegehydra

Maintainer

LicenseAGPL-3.0
Languagetypescript
Versionv1.0.0
UpdatedMay 16, 2026
Statushealthy
Maintenanceactive

Works with

ClaudeOpenAIwindowsmacoslinux

Installation

Manual Installation

npx bifrostmcp

Configuration

Configuration Details

Config File

claude_desktop_config.json

Performance

Response Metrics

Response Time< 200ms
ThroughputMedium

Resource Usage

Memory UsageLow
CPU UsageLow

How to Set Up and Use BifrostMCP

Bifrost MCP is a VS Code extension that runs an embedded MCP server exposing the editor's language server capabilities — including find usages, go to definition, rename, code actions, call hierarchy, and workspace symbol search — to AI assistants. By bridging VS Code's Roslyn (C#) and other language servers with AI tools like Cursor, Cline, or Claude, it enables semantic, language-aware code navigation and refactoring beyond what plain text search can achieve. The server communicates over HTTP/SSE on port 8008 by default.

Prerequisites

  • Visual Studio Code 1.93.0 or later
  • The Bifrost MCP extension installed from the VS Code Marketplace
  • Language-specific VS Code extensions installed for your project (e.g., C# extension for C# files)
  • An MCP-compatible AI client such as Cursor, Cline, Roo Code, or Claude Desktop
  • Node.js (for Cline users who need the supergateway bridge)
1

Install the Bifrost MCP VS Code extension

Open VS Code and install the Bifrost MCP extension from the Visual Studio Code Marketplace. Search for 'Bifrost MCP' by ConnorHallman.

2

Open your project in VS Code

Open the project folder you want to expose to your AI assistant. Bifrost starts an MCP server automatically when the extension activates. The server runs on port 8008 by default.

3

Optionally create a bifrost.config.json for custom ports

If you have multiple VS Code windows or want a project-specific port, create a bifrost.config.json in the project root. This isolates projects and avoids port conflicts.

{
  "projectName": "MyProject",
  "description": "Description of your project",
  "path": "/my-project",
  "port": 5642
}
4

Connect Cursor IDE

For Cursor, add the SSE URL directly to your MCP configuration. Newer versions of Cursor support the url shorthand.

{
  "mcpServers": {
    "Bifrost": {
      "url": "http://localhost:8008/sse"
    }
  }
}
5

Connect Cline (via supergateway)

Cline requires the supergateway bridge to connect to SSE-based MCP servers. Install supergateway via npx and add the following config.

{
  "mcpServers": {
    "Bifrost": {
      "command": "npx",
      "args": ["-y", "supergateway", "--sse", "http://localhost:8008/sse"],
      "disabled": false,
      "autoApprove": [],
      "timeout": 600
    }
  }
}
6

Verify the server is running

Use the VS Code command palette to manually start or inspect the server. Open the Debug Panel to test available tools.

BifrostMCP Examples

Client configuration (Cursor IDE)

Add this to your Cursor MCP configuration to connect to the Bifrost server running in VS Code.

{
  "mcpServers": {
    "Bifrost": {
      "url": "http://localhost:8008/sse"
    }
  }
}

Prompts to try

Once connected, ask your AI assistant to use Bifrost's language tools for semantic code navigation and refactoring.

- "Find all usages of the UserService class in this project."
- "Go to the definition of the IRepository interface."
- "Rename the method ProcessOrder to HandleOrder across the entire workspace."
- "Show me the call hierarchy for the Authenticate method."
- "Search for all symbols named 'Controller' in the workspace."
- "What quick fixes are available at line 42 of UserController.cs?"

Troubleshooting BifrostMCP

Port 8008 is already in use and the server fails to start

Create a bifrost.config.json in your project root and set a different port value. Use the 'Bifrost MCP: Start Server on port' command in VS Code if needed.

find_usages or go_to_definition returns no results for C# files

Ensure the official C# extension (ms-dotnettools.csharp) is installed and your project has fully loaded. Check the VS Code Output panel under 'Bifrost MCP' for errors.

Cline shows the server as red or disconnected

This is a known visual glitch — the server usually still works. Ensure supergateway is installed (npx -y supergateway) and that VS Code with Bifrost is running. Restart Cline if tools are unresponsive.

Frequently Asked Questions about BifrostMCP

What is BifrostMCP?

BifrostMCP is a Model Context Protocol (MCP) server that vscode extension with an mcp server that exposes semantic tools like find usages and rename to llms It connects AI assistants to external tools and data sources through a standardized interface.

How do I install BifrostMCP?

Follow the installation instructions on the BifrostMCP GitHub repository. Clone the repo, install dependencies, and add the server config to your AI client.

Which AI clients work with BifrostMCP?

BifrostMCP works with all major MCP-compatible AI clients including Claude Desktop, Claude Code, Cursor, VS Code (GitHub Copilot), Windsurf, and Cline.

Is BifrostMCP free to use?

Yes, BifrostMCP is open source and available under the AGPL-3.0 license. You can use it freely in both personal and commercial projects.

Browse More Developer Tools MCP Servers

Explore all developer tools servers available in the MCPgee directory. Each server includes setup guides for Claude, Cursor, and VS Code.

Quick Config Preview

{ "mcpServers": { "bifrostmcp": { "command": "npx", "args": ["-y", "bifrostmcp"] } } }

Add this to your claude_desktop_config.json or .cursor/mcp.json

Read the full setup guide →

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