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

1. Open Cursor Settings → MCP
2. Click Add new global MCP server
3. 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"
      }
    }
  }
}

3. Save the settings.

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

VS Code

1. Open User Settings (JSON)
2. 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"
        }
      }
    }
  }

3. Save your settings.

GrowthBook MCP is now ready to use in VS Code.

Claude Desktop

1. Open Settings → Developer
2. Click Edit Config
3. Open claude_desktop_config.json
4. 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"
      }
    }
  }
}

5. 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!

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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).
  • create_experiment: Creates a feature-flag based experiment.

• 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.