Flagsmith
What is the Flagsmith MCP Server?
The Flagsmith MCP (Model Context Protocol) Server connects your Flagsmith projects to AI assistants like Cursor, VS Code, and Claude.
It lets you create, read, update, and toggle feature flags, manage environments, and adjust segment targeting using natural language, without leaving your editor.
Flagsmith is open source, so you can point the server at Flagsmith Cloud or your own self-hosted instance.
How to use the Flagsmith MCP Server?
Add the server to any MCP-compatible client (Cursor, VS Code, Claude Desktop, Windsurf, or any IDE with MCP support), then provide your Flagsmith API key and, if you self-host, your API URL. Alternatively, you can also authenticate using OAuth. Once connected, you can manage flags by chatting with your AI tool.
Self-hosted users set FLAGSMITH_API_URL to their own instance. Flagsmith Cloud users can leave the default.
Key features of the Flagsmith MCP Server?
- Create, read, update, and toggle feature flags across environments
- Manage segments and targeting rules through natural language
- Inspect flag states and configuration without opening the dashboard
- Find and remove stale flags from your project
- Works with Flagsmith Cloud or any self-hosted Flagsmith instance
- Open source, with no vendor lock-in
Use cases of the Flagsmith MCP Server?
- Flagging a new feature behind a flag while you write the code, in one conversation
- Toggling a flag on or off in a specific environment during testing or rollout
- Auditing and cleaning up stale flags across a project
- Adjusting segment targeting rules without context-switching to the dashboard
FAQ from the Flagsmith MCP Server?
- What is a feature flag?
A feature flag is a technique that lets you turn features on or off without deploying new code, so you can release, test, and roll back safely.
- Do I need a Flagsmith account?
Yes. You need a Flagsmith API key from either Flagsmith Cloud or your own self-hosted instance.
- Can I use this with a self-hosted Flagsmith?
Yes. Set the API URL to your own instance and the server works exactly as it does against Flagsmith Cloud.
- Is Flagsmith open source?
Yes. Flagsmith is open source, so you can self-host it and avoid vendor lock-in.
- Which AI tools are supported?
Any client that supports the MCP (Model Context Protocol), including Cursor, VS Code, Claude Desktop, and Windsurf.
Server Config
{
"mcpServers": {
"flagsmith": {
"command": "npx",
"args": [
"mcp-remote",
"http://mcp.flagsmith.com/mcp"
]
}
}
}