BifrostMCP
VSCode Extension with an MCP server that exposes semantic tools like Find Usages and Rename to LLMs
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
Maintainer
Works with
Installation
Manual Installation
npx bifrostmcpConfiguration
Configuration Details
claude_desktop_config.json
Performance
Response Metrics
Resource Usage
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)
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.
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.
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
}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"
}
}
}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
}
}
}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.
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Set Up BifrostMCP in Your Editor
Choose your AI client for step-by-step setup instructions.
Quick Config Preview
Add this to your claude_desktop_config.json or .cursor/mcp.json
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