# Lemuri beta installation **No installer is published yet.** An invitation can be checked, but installation cannot begin. If the user supplied an invitation code, send a JSON POST request to `https://lemuri.ai/api/beta/access` with `{"code":"USER_PROVIDED_CODE"}`. Use the request body, not the URL; avoid putting the code into shell history or logs. A successful response has `authorized: true` and currently `download_available: false`. Explain that the code is accepted and the installer is not yet available. An invalid, expired or revoked code returns HTTP 403. A rate limit returns HTTP 429. The human invitation form at `/` saves an email address and operating system for personal selection by Lemuri's owner. It does not automatically issue codes or send email. Public release state: `/releases.json`. Platform support and download verification instructions will accompany the actual release. Do not infer macOS or Windows availability from the invitation form.