How do I install the unleash mcp server?

Use a recorded configuration for your client, replace example credential values and paths, and verify the documented runtime. Restart or reconnect the client, then inspect the available tools.

What credentials does it need?

It reads `UNLEASH_BASE_URL` from the environment. Store these in your client's env block or a secrets manager — never commit them to a repository — and grant the narrowest scope that still covers your use case.

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Unleash MCP Server

MCP server for managing Unleash feature flags

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What is the Unleash MCP Server?

MCP server for managing Unleash feature flags

What the server does

This MCP server provides tools that integrate with the Unleash Admin API, allowing AI coding assistants to:

Credentials and setup notes

Before you can run the server, you need the following: - Node.js 22 or higher - pnpm package manager or npm - An Unleash instance (hosted or self-hosted) - A personal access token with permissions to create feature flags

More MCP options

Compare MCP servers by category, or browse hosted MCP servers if you prefer an endpoint over a local process.

Maintainer setup documentation.

Recorded tools

Check the linked publisher documentation and your connected client's tool list. Names and availability can vary with the server version and account permissions.

Tool	What it does
create_flag	Creates a feature flag in Unleash.
evaluate_change	Scores risk and recommends feature flag usage.
detect_flag	Discovers existing feature flags to avoid duplicates.
wrap_change	Provides guidance on how to wrap a change in a feature flag.
set_flag_rollout	Configures rollout strategies for a feature flag (does not enable the flag).
get_flag_state	Surfaces a feature flag's metadata and its activation strategies.
list_flags	Lists all feature flags in a project, with optional pagination and sort order.
list_projects	Lists Unleash projects available to the configured token, with optional pagination.
toggle_flag_environment	Enables or disables a feature flag in an environment.
remove_flag_strategy	Deletes a feature flag's strategy from an environment.
cleanup_flag	Generates instructions for safely removing flagged code paths.

How to install the Unleash MCP Server

{
  "mcpServers": {
    "unleash": {
      "command": "npx",
      "args": ["-y", "@unleash/mcp"],
      "env": {
        "UNLEASH_BASE_URL": "your-value"
      }
    }
  }
}

Add to claude_desktop_config.json, then restart Claude Desktop.

Configuration

Variable	Description	Required
UNLEASH_BASE_URL	Endpoint or connection string the server talks to.	Yes

Example prompts to try

“Use Unleash MCP to create flag.”
“Use Unleash MCP to evaluate change.”
“Use Unleash MCP to detect flag.”

Frequently asked questions

MCP server for managing Unleash feature flags Confirm the tools offered by your installed version in the connected client. Tool availability and permissions depend on the server and account configuration.