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TL;DR

GrowthBook is a Developer Tools MCP server that lets Claude Code, Cursor, Windsurf and any MCP-compatible AI agent feature flags and A/B testing. Install in 1 minute with mcpizy install growthbook.

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GrowthBook

Developer Tools

Last updated May 30, 2026 · By MCPizy team

Feature flags and A/B testing. Create flags, review experiments, and manage rollouts.

Install GrowthBook

Via MCPizy CLI (recommended):
mcpizy install growthbook
Or run directly:
npx -y @growthbook/mcp
View on GitHub

Works with

Claude Code
Claude Desktop
Cursor
Windsurf
VS Code + Copilot
Any MCP Client

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Key Takeaways

  • GrowthBook exposes an MCP interface for developer tools workflows in Claude Code, Cursor and Windsurf.
  • No authentication required — works out of the box once installed.
  • Install in 1 command: mcpizy install growthbook — config written to your client automatically.
  • Free and open source (GitHub source linked above) — verified compatible with every MCP client (Claude Code, Claude Desktop, Cursor, Windsurf, VS Code + Copilot).
  • Best use case: automate developer tools workflows from your AI agent without leaving the editor.

Frequently asked questions

What is the GrowthBook MCP server?

The GrowthBook MCP server is an Developer Tools Model Context Protocol server that lets Claude Code, Cursor, Windsurf, VS Code with Copilot, and other MCP-compatible AI agents feature flags and A/B testing. It exposes GrowthBook's capabilities as tools the AI can call directly from your editor or CLI.

How do I install GrowthBook MCP with Claude Code?

The fastest way is the MCPizy CLI: run `mcpizy install growthbook` and MCPizy will add the server to your `.claude.json` automatically. You can also install it manually by adding an entry under `mcpServers` in `.claude.json` with the command `npx -y @growthbook/mcp` and restarting Claude Code.

Is GrowthBook MCP free?

Yes. The GrowthBook MCP server is free and open source (see the GitHub repository linked on this page). You may still need a GrowthBook account or API key to connect the server to the underlying service, but the MCP layer itself has no MCPizy subscription cost.

Does GrowthBook MCP work with Cursor and Windsurf?

Yes. Any MCP-compatible client works — including Claude Code, Claude Desktop, Cursor (via `.cursor/mcp.json`), Windsurf, VS Code with Copilot Chat, and custom agents built on the MCP SDK. The same install command targets all of them; only the config file path differs.

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What can I do with GrowthBook MCP?

Once installed, your AI agent can feature flags and A/B testing directly inside your conversation. Typical use cases include asking Claude Code or Cursor to run GrowthBook operations, inspect results, chain GrowthBook with other MCP servers (see our Workflow Recipes), and automate repetitive developer tools tasks without leaving your editor.