Requires Node 18+ on your system so npx can fetch the package on first run. Cursor reloads its MCP servers automatically the moment the file is saved — no restart needed. Paste the config below, then follow the reload step to register @launchdarkly/mcp-server.
~/.cursor/mcp.json.cursor/mcp.json (commit alongside your repo){
"mcpServers": {
"LaunchDarkly": {
"command": "npx",
"args": [
"-y",
"--package",
"@launchdarkly/mcp-server",
"--",
"mcp",
"start",
"--api-key",
"api-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx"
]
}
}
}