FSB MCP Server provides powerful browser control for MCP clients, using a DOM-first architecture that outperforms vision-based approaches. It supports multiple clients and offers a rich toolset. However, it requires installing a browser extension and automation needs supervision with security considerations.
FSB MCP Server is a local MCP server that allows external AI clients (e.g., Claude Code, Cursor, VS Code) to control the FSB Chrome extension. It exposes 66 registered tools covering manual browser control, read-only inspection, autopilot, trigger watchers, capability search/invoke, vault, and observability. The server communicates with the extension via a WebSocket bridge and supports both stdio and Streamable HTTP transports.
npx -y fsb-mcp-server install --claude-code; for Claude Desktop, --claude-desktop; for Cursor, --cursor; for VS Code, --vscode; for Windsurf, --windsurf; for Codex, --codex.\n3. Restart the client for the server to appear.\n4. Try a task from the client, e.g., 'Search for cats on Google'.{
"servers": {
"fsb": {
"type": "stdio",
"command": "npx",
"args": ["-y", "fsb-mcp-server"]
}
}
}