GrowthBook MCP

An official MCP server that enables AI agents to interact with GrowthBook for feature flag management and A/B testing. It provides tools for listing skills, reading skill definitions, and performing authenticated API read and write operations to create flags and retrieve experiment data.

Package and access

Local package with source-attributed installation metadata. Koskamo does not execute packages during review.

Community listingLocal stdioSource reviewed; not executedPublished by GrowthBook

You need:GB_API_KEY Yes for stdio; optional for HTTP OAuth — GrowthBook API key or personal access token

Vendor documentation

What you can do with it

Creating feature flags
Getting experiment data
Listing top-level skill entry points
Authenticated API passthrough for read/write operations

Source and maintenance

Community listingRegistry 2.2.0

mcp-registry: io.github.growthbook/growthbook-mcp@2.2.0 Source repository

Maintenance checked: Oct 31, 2026, 10:59 PM UTC

Packages and installation

Source-provided package data. Koskamo has not executed or live-probed this package.

@growthbook/mcp 2.2.0

npm

@growthbook/mcp package definition

{
  "version": "2.2.0",
  "transport": "stdio",
  "identifier": "@growthbook/mcp",
  "registryType": "npm",
  "environmentVariables": [
    {
      "name": "GB_API_KEY",
      "format": "string",
      "description": "A GrowthBook API key or personal access token."
    },
    {
      "name": "GB_API_URL",
      "format": "string",
      "description": "Your GrowthBook API URL. Defaults to https://api.growthbook.io."
    },
    {
      "name": "GB_SKILLS_ENABLED",
      "format": "string",
      "description": "Set to false to disable bundled skill tools (growthbook_list_skills, growthbook_read_skill). Defaults to true."
    },
    {
      "name": "GB_HTTP_HEADER_*",
      "format": "string",
      "description": "Custom HTTP headers via GB_HTTP_HEADER_<NAME> (e.g. GB_HTTP_HEADER_CF_ACCESS_TOKEN)."
    }
  ]
}

Tools

Reported by the attributed source; not independently observed by Koskamo.

No tool definitions available.

Connect from your client

Each snippet configures the same source-provided package; replace placeholders before use.

This server is operated by the named third party. Listing and endpoint checks are not an endorsement or a security audit. Review the operator's permissions, terms, and data handling before connecting. How listings are checked and corrected.

Cursor

Merge this local stdio configuration, replace every placeholder environment value, and restart Cursor. Koskamo has not executed this package.

Cursor configuration

{
  "mcpServers": {
    "growthbook-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@growthbook/mcp@2.2.0"
      ],
      "env": {
        "GB_API_KEY": "<YOUR_GB_API_KEY>",
        "GB_API_URL": "<YOUR_GB_API_URL>",
        "GB_SKILLS_ENABLED": "<YOUR_GB_SKILLS_ENABLED>",
        "GB_HTTP_HEADER_*": "<YOUR_GB_HTTP_HEADER__>"
      }
    }
  }
}

Cline

Merge this local stdio configuration, replace every placeholder environment value, and restart Cline. Koskamo has not executed this package.

Cline configuration

{
  "mcpServers": {
    "growthbook-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@growthbook/mcp@2.2.0"
      ],
      "env": {
        "GB_API_KEY": "<YOUR_GB_API_KEY>",
        "GB_API_URL": "<YOUR_GB_API_URL>",
        "GB_SKILLS_ENABLED": "<YOUR_GB_SKILLS_ENABLED>",
        "GB_HTTP_HEADER_*": "<YOUR_GB_HTTP_HEADER__>"
      }
    }
  }
}

VS Code

Merge this local stdio configuration, replace every placeholder environment value, and restart VS Code. Koskamo has not executed this package.

VS Code configuration

{
  "servers": {
    "growthbook-mcp": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@growthbook/mcp@2.2.0"
      ],
      "env": {
        "GB_API_KEY": "<YOUR_GB_API_KEY>",
        "GB_API_URL": "<YOUR_GB_API_URL>",
        "GB_SKILLS_ENABLED": "<YOUR_GB_SKILLS_ENABLED>",
        "GB_HTTP_HEADER_*": "<YOUR_GB_HTTP_HEADER__>"
      }
    }
  }
}

Claude Desktop

Merge this local stdio configuration, replace every placeholder environment value, and restart Claude Desktop. Koskamo has not executed this package.

Claude Desktop configuration

{
  "mcpServers": {
    "growthbook-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@growthbook/mcp@2.2.0"
      ],
      "env": {
        "GB_API_KEY": "<YOUR_GB_API_KEY>",
        "GB_API_URL": "<YOUR_GB_API_URL>",
        "GB_SKILLS_ENABLED": "<YOUR_GB_SKILLS_ENABLED>",
        "GB_HTTP_HEADER_*": "<YOUR_GB_HTTP_HEADER__>"
      }
    }
  }
}

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