# GET /v2/universes/system

**System universes**

System universes are read-only ticker lists rebalanced monthly by 30-day trailing dollar volume. Available to every account regardless of plan.

## Plan access

- **Plan access.** Included on every plan, Hobby through Enterprise.
- **Rate limit.** Hobby 60/min · Pro 2,000/min · Scale 10,000/min.
- **Universe.** All ~12,000 tracked tickers on every plan.

## Status codes

- **200** — List of system universes.

## Sample response

```json
{
  "as_of": "2026-05-14T11:41:01.000Z",
  "count": 2,
  "next_cursor": null,
  "universes": [
    {
      "id": "top_10",
      "name": "Top 10 by Dollar Volume",
      "description": "The 10 most actively traded tickers (30-day trailing dollar volume), rebalanced monthly on the 1st.",
      "tickers": ["NVDA", "MSFT", "AAPL", "AMZN", "GOOGL", "META", "TSLA", "AVGO", "BRK.B", "LLY"],
      "size": 10,
      "system": true,
      "effective_at": 1777593600,
      "next_rebalance_at": 1780272000,
      "rebalance_method": "30-day-trailing-dollar-volume"
    },
    {
      "id": "top_100",
      "name": "Top 100 by Dollar Volume",
      "description": "The 100 most actively traded tickers (30-day trailing dollar volume), rebalanced monthly on the 1st.",
      "size": 100,
      "system": true,
      "effective_at": 1777593600,
      "next_rebalance_at": 1780272000,
      "rebalance_method": "30-day-trailing-dollar-volume"
    }
  ]
}
```

## Examples

### Get system universes

Request:

```shell
curl https://api.tickerbot.io/v2/universes/system \
  -H "Authorization: Bearer YOUR_KEY"
```

Response (`200`):

```json
{
  "as_of": "2026-05-14T11:41:01.000Z",
  "count": 2,
  "next_cursor": null,
  "universes": [
    {
      "id": "top_10",
      "name": "Top 10 by Dollar Volume",
      "description": "The 10 most actively traded tickers (30-day trailing dollar volume), rebalanced monthly on the 1st.",
      "tickers": ["NVDA", "MSFT", "AAPL", "AMZN", "GOOGL", "META", "TSLA", "AVGO", "BRK.B", "LLY"],
      "size": 10,
      "system": true,
      "effective_at": 1777593600,
      "next_rebalance_at": 1780272000,
      "rebalance_method": "30-day-trailing-dollar-volume"
    },
    {
      "id": "top_100",
      "name": "Top 100 by Dollar Volume",
      "description": "The 100 most actively traded tickers (30-day trailing dollar volume), rebalanced monthly on the 1st.",
      "size": 100,
      "system": true,
      "effective_at": 1777593600,
      "next_rebalance_at": 1780272000,
      "rebalance_method": "30-day-trailing-dollar-volume"
    }
  ]
}
```

---

Interactive sandbox + parameter editor: https://tickerbot.io/api/endpoints/universes/system