How to build an event RSVP form with a response cap

Short answer: settings.max_responses and settings.close_at. Set either (or both) and QuizGen stops taking answers on its own — no manual cutoff.

Worked example

{
  "schema_version": 1,
  "kind": "registration",
  "title": "RSVP: Summer Rooftop Party",
  "description": "Space is limited to 150 guests.",
  "settings": {
    "collect_respondent": "email_required",
    "max_responses": 150,
    "close_at": "2026-08-20T23:59:00Z",
    "completion": { "message": "See you there! Check your email for details." }
  },
  "sections": [ { "key": "main", "questions": [
    { "id": "attending", "type": "choice", "prompt": "Will you be attending?", "required": true,
      "options": [
        { "value": "yes", "label": "Yes, I'll be there" },
        { "value": "no", "label": "Can't make it" }
      ] },
    { "id": "guests", "type": "number", "prompt": "How many guests total, including you?",
      "min": 1, "max": 4,
      "show_if": { "question": "attending", "op": "eq", "value": "yes" } },
    { "id": "dietary", "type": "long_text", "prompt": "Any dietary restrictions?",
      "show_if": { "question": "attending", "op": "eq", "value": "yes" } }
  ] } ]
}

The guests and dietary questions only appear once someone says they're attending (show_if) — no one who declines has to scroll past irrelevant fields.

What happens at the cap

Once the form hits max_responses or passes close_at — whichever comes first — the hosted page switches to "no longer accepting responses," and new POSTs to /api/respond get back a 410 quiz_full (or quiz_closed). Responses already collected stay fully readable.

Why email_required for RSVPs

collect_respondent: "email_required" means every response is tied to a real email — useful for RSVPs specifically, since you'll usually want to follow up with event details or a reminder, not just count heads.

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Full settings reference: quizgen.dev/llms.txt.