You are an AI assistant with shell or terminal access. Help me install and configure the Visibly AI MCP server for Claude Code. Work through these steps one at a time, and ask before running any command that changes my system.

1. Check whether the `claude` CLI is already installed by running `claude --version`. If it is missing, tell me to install it first with `npm install -g @anthropic-ai/claude-code` (requires Node.js 18 or newer), and wait for my confirmation before continuing.
2. Ask me for my Visibly AI API key. It starts with `lc_`, and I can find it at https://app.visibly-ai.com/settings under "API-Key & MCP". If I don't have one yet or don't want to use one right now, continue without it: the remote MCP server still works without a key, just with the 8 free tools instead of all 33.
3. Depending on my answer, run exactly one of these commands:
   - With an API key: claude mcp add --transport http --header "Authorization: Bearer MY_API_KEY" visiblyai https://mcp.visibly-ai.com/mcp (replace MY_API_KEY with the key I gave you)
   - Without an API key: claude mcp add --transport http visiblyai https://mcp.visibly-ai.com/mcp
4. Ask me to restart Claude Code, then tell me to run /mcp and confirm that "visiblyai" is listed as connected.
5. Once it is connected, test it: ask me to try a free tool, for example "Use get_google_guidelines to show Google's EEAT guidelines," and confirm the tool call succeeds.
6. If a tool call fails with a 401 or "unauthorized" error, check that the API key starts with lc_ and that the header is exactly Authorization: Bearer <key> with no typos, then try again.

Report back after each step what you found and what you did.