LaunchDarkly MCP Server for Claude

Overview

The LaunchDarkly MCP Server is the official Model Context Protocol server from LaunchDarkly. It gives Claude direct read/write access to your LaunchDarkly project — feature flags, AI configs, environments, code references, and audit logs — through the LaunchDarkly REST API. It runs locally via npx @launchdarkly/mcp-server over stdio, authenticated with a LaunchDarkly API key. Licensed under MIT.

Key capabilities

• Feature flags — list, create, inspect, update targeting rules (patch), and delete feature flags.
• AI Configs — manage AI configuration definitions for model-backed features.
• Environments — list and inspect the environments in your LaunchDarkly project.
• Audit log — view the history of changes to your project's flags and settings.
• Code references — connect feature flag keys to their locations in source code.

Tools

How it compares

LaunchDarkly's MCP is the only feature flag server to also expose AI Config management, making it well-suited for teams using LaunchDarkly's AI model-config feature alongside standard flag-based rollouts.

Installation

Claude Code

claude mcp add launchdarkly -- npx -y --package @launchdarkly/mcp-server -- mcp start --api-key YOUR_API_KEY

Replace YOUR_API_KEY with an API key from Settings → Authorization → API Keys in your LaunchDarkly account.

Claude Desktop

{
  "mcpServers": {
    "LaunchDarkly": {
      "command": "npx",
      "args": ["-y", "--package", "@launchdarkly/mcp-server", "--", "mcp", "start", "--api-key", "YOUR_API_KEY"]
    }
  }
}

Standalone binary

Download the pre-compiled binary from the GitHub Releases page:

curl -L -o mcp-server https://github.com/launchdarkly/mcp-server/releases/latest/download/mcp-server-bun-darwin-arm64
chmod +x mcp-server

Then reference the binary path in your MCP config instead of the npx command.

Requirements

• A LaunchDarkly account with an API key (Settings → Authorization).
• Node.js v18+ with npx (for the npm install method).
• An MCP client (Claude Code or Claude Desktop).

Security

• Use a dedicated API key with the minimum required scopes for your workflow.
• For read-only analysis, create a reader-role API key to prevent accidental writes.
• Flag patch and delete operations take effect immediately in the target environment.

Source Verification Notes

Verified on 2026-06-18:

• Official GitHub repository launchdarkly/mcp-server (MIT) documents the @launchdarkly/mcp-server npm package, npx install path, --api-key flag, and available resource groups: FeatureFlags (list/create/get/patch/delete), AiConfigs (list/create/get/delete), AuditLog, CodeReferences, and Environments.
• MCP server listing at feluda.ai/mcp-servers/launchdarkly independently confirms the feature flag management and API key authentication model.
• Claude Code MCP documentation at code.claude.com/docs/en/mcp describes the stdio connector setup pattern used above.