Hugging Face's official MCP server — search the Hub's models, datasets and Spaces, read repository files, and call thousands of Gradio applications as tools from one remote endpoint.
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UnleashMCP Server
by Unleash
Released
v0.4.1
Summary
Unleash's official MCP server for feature flags — and unusually, it first judges whether a change needs a flag at all before creating one.
Features
- evaluate_change scores the risk of a change and recommends whether a flag is warranted
- detect_flag finds existing flags so agents reuse rather than duplicate
- create_flag creates a validated, properly typed flag
- wrap_change explains how to wrap the code change in the flag
- set_flag_rollout and toggle_flag_environment control rollout strategy and per-environment state
- cleanup_flag generates instructions for safely removing flagged code paths
- list_flags and list_projects with pagination; get_flag_state for metadata and strategies
Installation
Set up this MCP server in your favorite AI agent — copy a ready-made configuration below.
Description
Most feature-flag integrations give an agent a create_flag call and leave the judgement to
the model, which is how codebases end up littered with flags nobody needed. Unleash's official MCP server is built
around the opposite instinct: the intended first call is evaluate_change, which scores the risk of a change and
recommends whether a flag is warranted at all. Only then does detect_flag check whether a suitable flag already
exists, so an agent reuses one instead of minting a near-duplicate.
From there the workflow is complete in both directions. create_flag creates a validated, properly typed flag;wrap_change explains how to wrap the code change around it; set_flag_rollout configures a rollout strategy
without enabling the flag, and toggle_flag_environment enables or disables it per environment — a separation that
matters, because "configured" and "live" are different states. get_flag_state surfaces a flag's metadata and
activation strategies, and list_flags and list_projects page through what exists. Crucially, cleanup_flag
generates instructions for safely removing flagged code paths, closing the loop that most teams leave open.
It runs locally over stdio from the @unleash/mcp npm package and talks to the Unleash Admin API, so it works
against both hosted and self-managed instances. Configuration needs UNLEASH_BASE_URL and a personal access token
in UNLEASH_PAT, with an optional UNLEASH_DEFAULT_PROJECT. The guidance it encodes comes from Unleash's own
documentation on using feature flags at scale.
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