GrowthBook MCP Server

With the GrowthBook MCP server, you can interact with GrowthBook right from your LLM client. See experiment details, add a feature flag, and more.

Setup

Environment Variables Use the following env variables to configure the MCP server.

Variable Name	Status	Description
GB_API_KEY	Required	A GrowthBook API key.
GB_USER	Required	Your name. Used when creating a feature flag.
GB_API_URL	Optional	Your GrowthBook API URL. Defaults to `https://api.growthbook.io`.
GB_APP_ORIGIN	Optional	Your GrowthBook app URL Defaults to `https://app.growthbook.io`.

Find instructions below to add the MCP server to a client. Any client that supports MCP is also compatible. Consult its documentation for how to add the server.

Cursor

Open Cursor Settings → MCP
Click Add new global MCP server
Add an entry for the GrowthBook MCP, following the pattern below:

{
  "mcpServers": {
    "growthbook": {
      "command": "npx",
      "args": ["-y", "@growthbook/mcp"],
      "env": {
        "GB_API_KEY": "YOUR_API_KEY",
        "GB_API_URL": "YOUR_API_URL",
        "GB_APP_ORIGIN": "YOUR_APP_ORIGIN",
        "GB_USER": "YOUR_NAME"
      }
    }
  }
}

Save the settings.

You should now see a green active status after the server successfully connects!

VS Code

Open User Settings (JSON)
Add an MCP entry:

 "mcp": {
    "servers": {
      "growthbook": {
        "command": "npx",
        "args": [
          "-y", "@growthbook/mcp"
        ],
        "env": {
          "GB_API_KEY": "YOUR_API_KEY",
          "GB_API_URL": "YOUR_API_URL",
          "GB_APP_ORIGIN": "YOUR_APP_ORIGIN",
          "GB_USER": "YOUR_NAME"
        }
      }
    }
  }

Save your settings.

GrowthBook MCP is now ready to use in VS Code.

Claude Desktop

Open Settings → Developer
Click Edit Config
Open claude_desktop_config.json
Add the following configuration:

{
  "mcpServers": {
    "growthbook": {
      "command": "npx",
      "args": ["-y", "@growthbook/mcp"],
      "env": {
        "GB_API_KEY": "YOUR_API_KEY",
        "GB_API_URL": "YOUR_API_URL",
        "GB_APP_ORIGIN": "YOUR_APP_ORIGIN",
        "GB_USER": "YOUR_NAME"
      }
    }
  }
}

Save the config and restart Claude

A hammer icon should appear in the chat window, indicating that your GrowthBook MCP server is connected and available!

Tools

Feature Flags
- create_feature_flag: Create, add, or wrap an element with a feature flag. Specify key, type, default value, and metadata.
- get_feature_flags: List all feature flags in your GrowthBook instance.
- get_single_feature_flag: Fetch details for a specific feature flag by ID.
- get_stale_safe_rollouts: List all safe rollout rules that have been rolled back or released.
- create_force_rule: Create a feature flag with a targeting condition.
- generate_flag_types: Generates types for feature flags
Experiments
- get_experiments: List all experiments in GrowthBook.
- get_experiment: Fetch details for a specific experiment by ID.
- get_attributes: List all user attributes tracked in GrowthBook (useful for targeting).
Environments
- get_environments: List all environments (e.g., production, staging) configured in GrowthBook.
Projects
- get_projects: List all projects in your GrowthBook instance.
SDK Connections
- get_sdk_connections: List all SDK connections (how GrowthBook connects to your apps).
- create_sdk_connection: Create a new SDK connection for your app, specifying language and environment.
Documentation Search
- search_growthbook_docs: Search the GrowthBook documentation for information on how to use a feature, by keyword or question.

GrowthBook MCP Server