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Bernstein

Bernstein is an MCP server that adds web browsing tools to AI assistants such as Claude Desktop, Claude Code and Cursor. The open-source governance layer for AI agents. It has 1,416 GitHub stars, is released under the Apache-2.0 license and runs locally with uvx bernstein.

github.com/sipyourdrink-ltd/bernstein (opens in a new tab)

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Install Bernstein

Generated from the server's MCP registry entry. Replace your-value with your own values.

Claude Desktop

claude_desktop_config.json
{
  "mcpServers": {
    "bernstein": {
      "command": "uvx",
      "args": [
        "bernstein"
      ]
    }
  }
}

Settings > Developer > Edit Config. macOS: ~/Library/Application Support/Claude/, Windows: %APPDATA%\Claude\. Restart Claude Desktop afterwards.

Claude Code

claude mcp add --transport stdio bernstein -- uvx bernstein

Cursor

.cursor/mcp.json
{
  "mcpServers": {
    "bernstein": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "bernstein"
      ]
    }
  }
}

Project file; use ~/.cursor/mcp.json to enable it in every project.

VS Code

.vscode/mcp.json
{
  "servers": {
    "bernstein": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "bernstein"
      ]
    }
  }
}

Config formats checked against the official docs on Oct 7, 2026: modelcontextprotocol.io (opens in a new tab), code.claude.com (opens in a new tab), cursor.com (opens in a new tab), code.visualstudio.com (opens in a new tab).

About Bernstein

"To achieve great things, two things are needed: a plan and not quite enough time." - attributed to Leonard Bernstein website · docs · install · first run · glossary · limitations · name policy · discord · sponsor

  • agent-orchestrator
  • deterministic-replay
  • air-gap
  • audit-trail
  • provenance
  • reproducibility
  • git-worktree
  • agent-fleet
  • orchestrator
  • parallel-agents

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FAQ

Bernstein FAQ

Still curious? Email info@appsgit.com.

What is Bernstein?

Bernstein is an MCP server that adds web browsing tools to AI assistants such as Claude Desktop, Claude Code and Cursor. The open-source governance layer for AI agents. It has 1,416 GitHub stars, is released under the Apache-2.0 license and runs locally with uvx bernstein. The source code is at github.com/sipyourdrink-ltd/bernstein.

How do I install the Bernstein MCP server?

Add the command uvx bernstein to your MCP client: put it in claude_desktop_config.json for Claude Desktop, run claude mcp add for Claude Code, or add it to .cursor/mcp.json (Cursor) or .vscode/mcp.json (VS Code). The snippets on this page are ready to paste.

Is Bernstein free?

The server is open source under the Apache-2.0 license, so running it is free. It does not declare any required API key.

Is Bernstein actively maintained?

The most recent commit was on Oct 7, 2026. The latest release is v3.21.0, published Oct 5, 2026. appsgit only lists MCP servers with a commit in the last six months and re-checks every server daily.