ConfigCat MCP Server

Most developer tooling work still happens through a UI a human drives. ConfigCat MCP server moves it into the conversation instead. interacts with ConfigCat feature flag platform. Supports managing feature flags, configs, environments, products and organizations. Helps to integrate ConfigCat SDK, implement feature flags or remove zombie (stale) flags.

The short version

You can use the following environment variables to configure the MCP server.

• Complete set of tools for ConfigCat's public management API operations. You can Create, Read, Update and Delete any entities like Feature Flags, Configs, Environments or Products within ConfigCat
• Get comprehensive SDK documentation and code examples for seamless feature flag implementation in your project

The tools it exposes

The server publishes 14 tools. What each one is for:

• get-setting-value — Get feature flag value
• update-setting-value — Update feature flag value
• replace-setting-value — Replace feature flag value
• get-setting-values — Get multiple setting values
• post-setting-values — Update multiple setting values
• Cursor — 1. Open Preferences -> Cursor Settings -> MCP & Integrations 2. Click Add Custom MCP 3. Add the following server definition for the ConfigCat MCP
• Organizations — The Organizations tool exposed by this server
• Members — The Members tool exposed by this server
• General — The General tool exposed by this server
• Products — The Products tool exposed by this server
• Configs — The Configs tool exposed by this server
• Environments — The Environments tool exposed by this server

Getting it running

Setup follows the usual MCP pattern — install or clone the server, register it in your client's configuration file, restart the client. The configuration blocks on this page cover the common clients.

What it needs from you

Configuration is passed through the environment: CONFIGCAT_API_USER, CONFIGCAT_API_PASS, CONFIGCAT_BASE_URL. Treat anything key-shaped as a real credential — scope it to the minimum the server needs, and rotate it if it ever lands in a shared config.

How it compares

This sits in the developer tooling group, where several servers overlap in what they claim to do but differ sharply once you actually set them up. ConfigCat's toolset — get-setting-value, update-setting-value, replace-setting-value and 11 more — is a fair guide to whether it matches your workflow.

We check each listing at SyncDev against the project's documentation before it goes live — if something here drifts out of date, it is a bug worth reporting.

Things to watch

• It runs with your machine's permissions. That is convenient and also the reason to think about what you point it at before you approve a tool call.
• With 14 tools registered it takes up a noticeable share of the context window; turn it off in projects that never touch ConfigCat.
• Missing credentials fail quietly in some clients — if no tools show up, check the environment block first.
• Keep per-call confirmation enabled while you learn its behaviour; it is the cheapest safeguard you have.