curl --request GET \
  --url https://api.elections.kalshi.com/trade-api/v2/multivariate_event_collections

{
  "cursor": "<string>",
  "multivariate_contracts": [
    {
      "associated_event_tickers": [
        "<string>"
      ],
      "associated_events": [
        {
          "active_quoters": [
            "<string>"
          ],
          "is_yes_only": true,
          "size_max": 123,
          "size_min": 123,
          "ticker": "<string>"
        }
      ],
      "close_date": "2023-11-07T05:31:56Z",
      "collection_ticker": "<string>",
      "description": "<string>",
      "functional_description": "<string>",
      "is_all_yes": true,
      "is_ordered": true,
      "is_single_market_per_event": true,
      "open_date": "2023-11-07T05:31:56Z",
      "series_ticker": "<string>",
      "size_max": 123,
      "size_min": 123,
      "title": "<string>"
    }
  ]
}