Growthbook MCP runs on your own machine — the client starts it, so there is no endpoint to ping. 6 106 installs a week from npm. Last commit 21 Sep 2026.
Thin MCP server for GrowthBook — skill loader + authenticated API passthrough
We read the source, 7 h ago · rules 3dff92dd89df
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
этот файл ставится пользователю, но в репозитории его нет
for (const [key, value] of Object.entries(process.env)) {
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add growthbook-mcp -- npx -y @growthbook/mcp
{
"mcpServers": {
"growthbook-mcp": {
"args": [
"-y",
"@growthbook/mcp"
],
"command": "npx"
}
}
}
[mcp_servers.growthbook-mcp]
command = "npx"
args = ["-y", "@growthbook/mcp"]
{
"mcpServers": {
"growthbook-mcp": {
"args": [
"-y",
"@growthbook/mcp"
],
"command": "npx"
}
}
}
{
"mcpServers": {
"growthbook-mcp": {
"args": [
"-y",
"@growthbook/mcp"
],
"command": "npx"
}
}
}
This one needs environment variables set before it will start:
GB_API_KEY (A GrowthBook API key or personal access token.), GB_API_URL (Your GrowthBook API URL. Defaults to https://api.growthbook.io.), GB_SKILLS_ENABLED (Set to false to disable bundled skill tools (growthbook_list_skills, growthbook_read_skill). Defaults to true.), GB_HTTP_HEADER_* (Custom HTTP headers via GB_HTTP_HEADER_<NAME> (e.g. GB_HTTP_HEADER_CF_ACCESS_TOKEN).).
The author declared them in the registry entry; get the values from the project itself.
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Answers built from our own checks of this server.