Unleash MCP Server
Unleash MCP Server. The unleash feature flag mcp server wraps that behind the Model Context Protocol, so an assistant can use it rather than through you.
This repository contains a Model Context Protocol (MCP) server for interacting with Unleash feature flag management system. It allows AI agents to manage feature flags through the Unleash API.
The Model Context Protocol (MCP) is a specification for enabling AI models to interact with external tools and data sources. This server implements the MCP protocol for Unleash, allowing AI assistants to manage feature flags programmatically.
Installation goes through your MCP client rather than a global install: point it at @ylin6/unleash-ff-mcp-server on npm and it is fetched when the client starts. The copy-paste blocks for Claude Desktop, Claude Code and Cursor are further down this page.
You will need 2 environment variables: UNLEASH_API_URL, UNLEASH_AUTH_TOKEN. The server will not start without them, which is usually why the tools fail to appear on a first run. Keep credentials in your client's env block or a secrets manager rather than in a file you might commit.
Among the developer tooling options, the useful question is rarely "what can it do" but "what does it cost you to run" — permissions, credentials, and how much of your context its toolset consumes. It is maintained by ylin6; worth a glance at recent repository activity before you build anything load-bearing on it.
This entry was verified against Unleash Feature Flag's own documentation before publication; SyncDev keeps the directory reviewed rather than auto-generated.
{
"mcpServers": {
"unleash-ff": {
"command": "npx",
"args": ["-y", "@ylin6/unleash-ff-mcp-server"],
"env": {
"UNLEASH_API_URL": "your-value",
"UNLEASH_AUTH_TOKEN": "your-value"
}
}
}
}Add to claude_desktop_config.json, then restart Claude Desktop.
| Variable | Description | Required |
|---|---|---|
| UNLEASH_API_URL | Endpoint or connection string the server talks to. | Yes |
| UNLEASH_AUTH_TOKEN | Credential the server authenticates with. | Yes |
Kill hallucinated APIs — version-accurate, up-to-date library documentation injected straight into context.
Microsoft's official browser automation server — drive a real browser through the accessibility tree, no screenshots needed.
GitHub's official server — repos, issues, pull requests, Actions and code security, straight from your assistant.
Issue tracking at the speed of conversation — Linear's official hosted server with OAuth and zero install.
Local repository surgery — status, diffs, commits, branches and history for any repo on disk.
Timezone sanity for AI — current time anywhere and correct conversions, without the model doing date math.