Two simpler ways to install, so you don't have to hand-build a config command.
Claude Desktop — one click
Download ecardwidget-mcp-0.2.0.mcpb below and open it. Claude Desktop shows an install dialog that asks you for your API key and stores it in your OS keychain — no config files, no commands.
Everything else — sign in once
npx ecardwidget-mcp login # prompts for your key, verifies + saves it (0600)
claude mcp add ecardwidget -- npx -y ecardwidget-mcpNo key in the command; the server reads the saved credential. npx ecardwidget-mcp logout removes it.
Manual (unchanged)
Set ECW_API_KEY in your client's MCP config. An explicit env var always takes precedence over the saved key.
Generate a scoped API key in your dashboard: Settings → Developers → API Keys. The server registers only the tools your key permits, and destructive actions require a two-step confirmation.